Fact-checked by Grok 2 weeks ago

AS-Interface

AS-Interface (ASi), short for Sensor-Interface, is a globally standardized industrial bus system for the lower field level of , enabling the simple and cost-effective connection of and analog sensors and s to higher-level control systems via a single unshielded two-conductor that supplies both and . Developed to replace traditional hard-wiring, it supports topologies such as line, star, or tree configurations and allows for network lengths up to 100 meters per segment, extendable to over 500 meters with repeaters. The technology originated in 1990 when a of European companies sought a unified solution for sensor-actuator networking, leading to the founding of the AS-International Association in 1991 to oversee its development and standardization. The first prototypes emerged in 1992, with commercial deployment beginning in 1994, and international standards EN 50295 and IEC 62026-2 established by 1999 to ensure across manufacturers. ASi has since evolved through versions like ASi-3.0 (introduced in 2004), which enhanced addressing and diagnostics, and the more recent ASi-5, which employs (OFDM) for higher data rates—up to 3072 bytes of cyclic process data input/output—and cycle times as low as 1.2 milliseconds, supporting up to 96 devices per network while maintaining . Key features include tool-free piercing connections for easy installation, reverse polarity protection, IP69K-rated components for harsh environments, and integrated safety functions compliant with EN for performance levels up to e. These attributes make ASi particularly suitable for factory automation, process industries, and building systems, where it reduces wiring complexity, control cabinet , and maintenance costs compared to discrete wiring or other fieldbuses. The system's facilitates retrofits and expansions, with electronic addressing performed directly over the bus, and it integrates seamlessly as a subnetwork for protocols like or . Globally adopted, ASi powers millions of devices worldwide, with ongoing innovations like ASi-5 enabling advanced diagnostics, compatibility, and support for Industry 4.0 applications such as predictive .

History and Development

Origins and Early Adoption

The AS-Interface (ASi) standard emerged in the and early as a response to the challenges of complex wiring in industrial and networks, where traditional parallel cabling was labor-intensive, error-prone, and costly. A consortium of 11 primarily German and Swiss companies, including , , , Leuze Electronic, , Balluff, ifm electronic, Baumer, and ELESTA, collaborated to develop a simple, standardized networking solution for binary I/O devices at the field level. This initiative focused on enabling a single two-wire cable to carry both power and data, drastically simplifying connections in environments. As development progressed, the original consortium dissolved, leading to the establishment of the in 1991 as an independent organization to oversee the standard's specifications, , and global promotion. The ensured among manufacturers and facilitated international efforts. The first commercial ASi system was publicly demonstrated at the Hanover Fair in 1994, highlighting its potential for seamless integration of sensors and actuators. This debut paved the way for early implementations in factory automation, where ASi served as a replacement for cumbersome multi-wire setups. Early adopters recognized ASi's key advantages, including substantial cost reductions through minimized wiring, enhanced flexibility in device layout without rewiring, and reduced risks via automatic addressing and diagnostics. These benefits were particularly valuable for binary I/O applications in the lowest level of the automation pyramid, such as connecting proximity sensors, valves, and indicators directly to systems. By the early , ASi had achieved widespread uptake, with millions of s installed worldwide, solidifying its role in streamlining field-level communications. The standard's evolution during the included formalization under norms like EN 50295 in 1999 and IEC 62026-2 in 2000, setting the stage for broader compatibility.

Evolution to ASi-5 and Recent Advances

The standardization of AS-Interface as EN 50295 in 1999 marked a pivotal milestone, establishing it as a norm for actuator-sensor interface systems in low-voltage switchgear and controlgear. This was followed by its adoption as the IEC 62026-2 in 2000, which defined the bit-oriented for connecting sensors and actuators to a master device, promoting across global manufacturers. The IEC standard underwent significant updates, with the second edition published in 2008, followed by amendments including one in 2019 to refine specifications for enhanced reliability and compatibility, solidifying AS-Interface's position as a normative framework for field-level networking in industrial automation. Building on this foundation, further evolution included ASi-3.0 in 2004, which improved addressing and diagnostics capabilities. ASi-5 was introduced in at the SPS IPC Drives fair in , , representing a major evolutionary step that increased data throughput while maintaining backward compatibility with earlier versions. This advancement facilitated seamless integration with devices, enabling greater digitalization by supporting larger data packets and faster cycle times for real-time applications without requiring extensive rewiring. ASi-5's design emphasized future-proofing for Industry 4.0 environments, allowing actuator-sensor networks to handle complex diagnostics and parameter exchanges directly over the existing two-wire infrastructure. From 2022 onward, ASi-5 capabilities expanded notably, including the integration by SEW-Eurodrive into its MOVI-C modular system, which enhanced drive control and efficiency through plug-and-play . This period also saw strengthened IIoT , with ASi-5 gateways supporting OPC UA interfaces to bridge field-level data to higher-level IT systems, enabling and remote in distributed setups. Adoption grew in process technology and drive systems, exemplified by the launch of the GEMÜ 4242 ASi-5 combi switchbox in September 2025, a valve controller optimized for pneumatic linear actuators in hazardous environments with ATEX and IECEx certifications. By 2025, over 40 million AS-Interface devices had been installed worldwide, with ASi-5 driving recent market expansion through its support for intelligent sensor integration. The AS-International Association, founded in 1991, has played a central role in these evolutions by developing and maintaining specifications, conducting product certifications, and ensuring ongoing compliance with international norms to foster widespread adoption. Through annual updates and developer seminars, the association continues to certify new ASi-5 implementations, promoting interoperability and innovation in technology up to 2025.

Applications and Benefits

Industrial and Process Automation

AS-Interface (ASi) is widely deployed in automation for connecting binary sensors, such as proximity switches, and actuators, like solenoids, in conveyor systems, packaging lines, bottling plants, and valves. In conveyor systems, ASi enables efficient control of by linking multiple sensors and actuators along the line, facilitating seamless detection and movement of goods. Packaging lines benefit from ASi's ability to integrate devices for tasks like filling, sealing, and labeling, where rapid ensures synchronized operations. Bottling plants utilize ASi to manage valve positions and sensor feedback during high-speed filling processes. Key benefits in factory include significant wiring cost reductions of up to 70% through ASi's single-cable , which eliminates the need for extensive multi-wire harnesses. Simplified is achieved via piercing , allowing devices to be tapped into the flat without stripping or specialized tools, thereby reducing time and errors. The system's supports up to 248 I/O points per , enabling expansion without major rewiring and accommodating growing needs in dynamic environments. These features collectively lower initial setup costs and enhance flexibility for reconfiguration during production changes. In process technology, ASi integrates into chemical and pharmaceutical for precise and level detection, where it connects sensors fluid levels and actuators regulating in pipelines and tanks. This setup reduces through hot-pluggable devices, permitting replacement without network interruption or power shutdown, thus maintaining continuous operation in sensitive environments. For instance, ASi-5 implementations allow direct integration of sensors for real-time process data like pressure and temperature, improving accuracy and compliance with stringent industry standards. Notable case examples illustrate ASi's impact, such as the implementation of ASi-5 at Mercedes-Benz's Factory 56 in , , starting in 2020, where it supports flexible by connecting units to numerous receiver devices via a single two-conductor , enabling rapid reconfiguration for diverse production lines. In bottling applications, ASi networks achieve cycle times as low as 5 milliseconds for up to 31 slaves, ensuring of valves and sensors to prevent overflows and maintain precision. These deployments highlight ASi's role in enhancing operational reliability. Economically, ASi enables modular machine designs by minimizing cabling complexity and maintenance requirements, which reduces error rates during installation and supports Industry 4.0 initiatives for smart, adaptable factories. This modularity facilitates easier upgrades and scalability, lowering long-term operational costs and accelerating in automated systems.

Safety Systems and Emerging Uses

AS-Interface plays a crucial role in safety-critical applications by supporting safety integrity levels up to SIL 3 and performance levels up to PL e, as defined in standards such as EN ISO 13849-1 and , through certified safe slaves. These slaves enable the seamless integration of protective devices like emergency stop buttons, light curtains with resolutions from 14 mm to 30 mm and protection heights up to 1770 mm, and two-hand control panels into machinery safety circuits. For instance, components such as the NAS 311-AS emergency-stop button and SLC 440-AS light curtain provide Category 4 safety with programmable features like blanking, ensuring reliable monitoring of up to 31 safe AS-i slaves on a single network. Integration with higher-level safety networks is facilitated through dedicated gateways that connect AS-Interface to protocols like PROFIsafe over or CIP Safety over , allowing mixed operation of safe and unsafe inputs/outputs on one unshielded two-wire cable. This setup supports up to 1,536 safe I/Os per network while maintaining compatibility with fieldbus systems such as , TCP, and , reducing wiring complexity in safety architectures. Such gateways enable safe AS-i slaves to report and switch via black-channel principles, ensuring fail-safe communication without separate cabling for safety signals. Emerging applications extend AS-Interface beyond industrial automation into building and , where it controls door interlocks, smoke exhaust dampers, and lighting systems for energy-efficient operation, minimizing installation costs through reduced cabling and free topology. The ASi-5 extension enhances IIoT capabilities in smart factories by enabling via increased data bandwidth—up to 32 bytes per device—and integration, as demonstrated in applications like decentralized inverter monitoring for material flow s. For example, in 2022, SEW-EURODRIVE integrated ASi-5 into its MOVI-C® modular , providing piercing technology for failsafe profile cables and advanced diagnostics over 200 m networks. As of 2025, ASi-5 includes a new update profile enabling cross-manufacturer firmware updates for connected devices, further supporting process digitalization and IIoT trends. Key advantages in these new domains include high noise immunity and resistance, making AS-Interface suitable for harsh environments with wet or dirty conditions, alongside extensive diagnostics for remote monitoring and automatic device recognition. of ASi-5 with ASi-3 allows mixed operation on existing networks, facilitating gradual adoption without complete rewiring and ensuring smooth upgrades in legacy systems.

System Architecture

Components and Network Topology

The AS-Interface (ASi) network fundamentally consists of a single device, such as a gateway or (PLC) interface, which controls communication with multiple slave devices. Slaves encompass sensors, actuators, (I/O) modules, and other field devices that connect to the network for data exchange and control. In the standard configuration, a single supports up to 62 slaves using addressing , enabling up to 248 binary inputs and 248 binary outputs. With the ASi-5 extension, this capacity increases to up to 96 slaves, facilitating larger networks and improved integration of intelligent devices like . All components must be certified by the AS-International Association to ensure compatibility across manufacturers, with examples including like the IE/AS-i LINK PN IO and Pepperl+Fuchs slaves such as the K60 series sensors. Network topology in ASi systems is highly flexible, supporting line, , , or structures without requiring specific wiring rules, which simplifies installation in environments. The physical medium is an unshielded, two-wire flat (profile cable) that carries both data and power, with a standard maximum length of 100 meters per segment for ASi-3 (200 meters for ASi-5); this can be extended to over 500 meters total using repeaters. Star-like configurations are enabled through repeaters or distributors, allowing branches without signal degradation. For ASi-5, the topology remains topology-free but supports enhanced cabling up to 2.5 mm² cross-section for higher current handling. Slave addressing employs a scheme: standard 5-bit IDs (addresses 1 to 31) for basic setups, expandable with A/B variants for up to 62 slaves, including parameter settings for I/O mapping via or handheld tools. In extended mode, this supports up to 124 or 248 I/O points depending on . ASi-5 introduces extended addressing for more granular , allowing automatic recognition and parameterization of up to 96 devices. Power distribution occurs over the same two-wire cable at 30.5 V DC, with a total capacity of up to 8 A from dedicated ASi power supplies, though voltage drops must be considered for longer runs to maintain slave functionality. Ground-fault detection and data decoupling units ensure reliable operation in extended networks.

Cabling and Power Distribution

The AS-Interface system employs a specialized unshielded, flat two-wire , typically in a yellow profile, to serve as the physical medium for both transmission and . This design, with dimensions of approximately 10 mm in width and 4 mm in thickness, facilitates simple integration through piercing contacts that enable tool-free tapping and daisy-chaining of slave devices directly onto the line. The unshielded construction minimizes material costs while supporting robust connections in industrial environments, where the two wires—one acting as the power return and the other handling combined and power—streamline installation compared to traditional multi-wire setups. Cable length limitations are defined to ensure and power stability, with a standard maximum of 100 m per segment for ASi-3 networks (200 m for ASi-5) without additional components. Extensions are possible beyond 300 m using to mitigate . These limits accommodate most field-level applications, such as connecting sensors and actuators in manufacturing lines, while preventing excessive voltage drops. Power distribution in AS-Interface is integrated into the same two-wire , utilizing a regulated voltage of 29.5–31.6 V provided by dedicated ASi power supplies, which deliver a total current capacity of up to 8 A across the network. Each slave device is limited to a maximum draw of 200 mA to maintain system stability and prevent overloads, with the power supply ensuring consistent delivery even under varying loads from multiple nodes. This unified approach eliminates the need for separate power cabling, enhancing in distributed setups. Installation guidelines emphasize reliability in harsh industrial conditions, requiring IP67-rated connectors for dust- and water-resistant junctions and compliance with electromagnetic compatibility () standards to operate effectively in electrically noisy environments like factories with heavy machinery. The supported tree topology allows branching from the main line, significantly reducing overall requirements—often by 50–70% compared to point-to-point wiring—by enabling flexible layouts that minimize excess runs to remote devices. For extended networks, auxiliary 24 V power options via a separate black can supplement the primary ASi supply, supporting higher loads without compromising core functionality. Maintenance of the cabling and infrastructure benefits from built-in visual diagnostics, such as LED status indicators on power supplies and slaves that signal voltage levels, connection integrity, and fault conditions for quick . In longer segments or high-density configurations, integration helps isolate and resolve power-related issues, ensuring minimal downtime during inspections or repairs.

Communication Technology

Core Principles and Protocols

The AS-Interface (ASi) operates on a , where a single device cyclically polls all connected slave devices in a deterministic manner to ensure predictable communication. The initiates communication by sending request telegrams to each slave, addressed sequentially from 1 to 31 (or up to 62 in extended modes), and slaves respond only when directly addressed, using a request-response telegram exchange. This polling mechanism prevents collisions and supports up to 31 slaves in a basic network configuration, with the controlling all timing and traffic. Data transmission in ASi employs Manchester II coding at a bit rate of 167 kbit/s, which encodes each bit through specific voltage transitions on the two-wire bus to provide self-clocking and balance. A telegram begins with a start sequence featuring a falling edge, followed by bits represented by falling-to-rising (logical 0) or rising-to-falling (logical 1) transitions within each bit period. The telegram structure consists of a start bit, up to four 4-bit cycles (allowing 16 bits total in extended formats), a for error checking, and an end sequence to delineate the frame; this design also enables acyclic parameter setting for configuration outside regular polling cycles. The ensures deterministic times, with a full poll of 31 slaves completing in 5 ms, facilitating control in environments. Error detection is achieved through even bits in each telegram and timers in slaves that reset the device if no valid poll is received within approximately 41 ms, maintaining high classified under DIN 19244 Class 3. For , standard operations use single-channel signaling, while safe operations employ dual-channel configurations for ; noise immunity is enhanced by signaling on the unshielded two-wire , allowing robust performance in industrial settings without additional shielding.

ASi-3 Implementation

AS-Interface version 3.0, known as ASi-3, enhances the original by introducing extended addressing capabilities while maintaining the core binary data transmission framework for simple and integration in environments. In ASi-3, each cyclic telegram exchanged between the master and a slave carries 4 bits of output data from the master to the slave and 4 bits of input data in response from the slave, enabling binary-only I/O operations typically configured as 1 input and 1 output per slave in standard setups. This structure supports up to 31 standard slaves per network, but extended addressing doubles the capacity to 62 slaves by incorporating an A/B slave selection bit in the address field, allowing a total of 248 I/O points (124 inputs and 124 outputs) across the network for legacy-compatible binary devices. The relies on a dedicated for non-cyclic operations, such as slave assignment and configuration, which occurs via separate telegrams outside the standard cyclic exchange to avoid impacting real-time performance. Transmission in ASi-3 operates at a fixed rate of 167 kbit/s over a single two-wire unshielded flat cable, providing both power and data to slaves while supporting a maximum cable length of 100 meters without repeaters. The resulting cycle time for polling all slaves is 5 ms in standard mode with 31 slaves, scaling to 10 ms in extended addressing mode to accommodate the additional slaves without exceeding the protocol's deterministic bounds. For slave access, the master issues a single request telegram per slave in the cycle, but configuration or parameter transfers may involve up to four consecutive 4-bit telegrams to handle addressing and verification sequences reliably. This binary-focused design ensures low-latency communication for digital I/O, with all ASi-3 slaves fully compatible with existing AS-Interface masters that adhere to the V3.0 specification. Safety integration in ASi-3 is achieved through ASi Safety at Work, which enables up to SIL 3 according to and Performance Level e (PL e) per EN ISO 13849-1 by pairing safe input slaves and performing cross-checking of redundant signals transmitted over the same cable. Safe pairs involve two slaves monitoring the same safety signal, with the master comparing their inputs for consistency and detecting discrepancies via protocol-level error checking, ensuring fault-tolerant operation without additional wiring. This safety extension has been certified by for compliance in hazardous environments, allowing seamless integration of emergency stops, guards, and other safety devices into the ASi-3 network while adhering to black-channel principles for data transmission. Despite these advancements, ASi-3 remains limited to binary I/O and lacks native for analog signals or large payloads, requiring separate modules or higher versions for such needs, which positions it ideally for cost-effective, simple field-level in systems.

ASi-5 Enhancements

ASi-5 represents a significant evolution in the AS-Interface standard, introducing enhanced handling capabilities to meet the demands of modern systems requiring higher and more sophisticated . It supports a cyclic of 16 bits per per , expandable to up to 32 bytes of flexible process per , along with a 256-byte acyclic channel for parameter exchange and diagnostics. This allows for up to 96 slaves per network, enabling a total of 1,536 inputs/outputs per Ethernet node, a substantial increase from the limitations of earlier versions like ASi-3, which supported fewer s and binary-focused operations. Transmission specifications in ASi-5 use (OFDM) with a carrier frequency range of 1–2 MHz to achieve higher data throughput compared to the 167 kbit/s of earlier versions, with a constant cycle time of 1.27 ms for full network loads including 384 bits of input and output data, ensuring low below 10 ns for precise timing in dynamic applications. For smaller configurations, such as 24 slaves, cycle times can reach as low as 1.2 ms, while scaling to 96 slaves extends to approximately 5 ms without compromising overall performance. with ASi-3 is maintained through dual-mode masters that enable glitch-free mixed operation of ASi-5 and ASi-3 slaves on the same network, facilitating gradual upgrades in existing installations. Protocol enhancements in ASi-5 include a dedicated parallel parameter channel for advanced diagnostics and configuration, allowing channel-specific monitoring of device status and faults to maximize system availability. Integration with is a key feature, supporting up to 96 IO-Link masters per with 32 bytes of cyclic per device and full acyclic parametrization, enabling the transmission of analog and sensor such as , , and without additional wiring. The system adopts a flexible tree topology, extending cable lengths up to 200 meters while powering devices via a single two-wire line, reducing installation complexity compared to point-to-point protocols like IO-Link, which are better suited for single-device connections but less efficient for multi-device . Safety capabilities in ASi-5 achieve SIL 3/PL e certification per , with support for 16 safe bits per user and up to 1,536 safe inputs/outputs per network, allowing combined transmission of safe and standard data packets over the same cable for streamlined safety-integrated designs. For digitalization and Industry 4.0 applications, ASi-5 incorporates IIoT readiness through OPC UA gateways, which provide integrated servers for real-time data shuttling from the field level to higher IT systems, enabling via of parameters like current consumption, temperature, and vibration. Recent integrations as of 2025 highlight expanded diagnostics and drive control functionalities, exemplified by SEW-EURODRIVE's ASi-5 modules within their MOVI-C® system, which support 16-bit cyclic control for velocity and acceleration alongside acyclic engineering data for decentralized motor operations like MOVIMOT units. These modules offer automatic device recognition and enhanced diagnostics channels, providing a single connection for oversight and contributing to reduced through proactive fault detection in conveyor and systems. Overall, ASi-5's advantages over alternatives like include lower wiring costs and greater scalability for distributed s, making it ideal for applications demanding high data throughput and multi-protocol convergence.

Standardization and Certification

International and Regional Standards

The AS-Interface system is primarily governed by the IEC 62026-2 Ed. 2.1 (2019), which outlines the general specifications for the actuator sensor interface, including communication methods between control devices and switching elements, protocols, and basic safety requirements to ensure . This establishes a framework for connecting sensors and actuators in environments, supporting up to 62 slaves per and Manchester-coded at 167 kbit/s. In , the harmonized norm EN 62026-2:2013/A1:2019 adopts and aligns with the IEC standard, enabling manufacturers to apply the under the Directive by demonstrating compliance with essential health, safety, and environmental protection requirements. Regional adoptions further extend compatibility globally, such as JIS C 82026-2 (2013) in , GB/T 18858.2 (2002, revised 2012 as identical to IEC 62026-2) in , and KS C IEC 62026-2 (2007) in , all of which facilitate seamless integration of AS-Interface devices across international markets. The AS-International Association e.V. plays a central role in maintaining and evolving the standard by managing detailed specification profiles—for instance, Profile S-B3-BA defines parameters for basic digital input/output slaves—and enforcing mandatory certification for all network components to verify compliance and interoperability among vendors. The 2019 amendment of EN 62026-2 and IEC 62026-2 incorporated elements supporting the AS-i safety system, with ASi-5 enhancements handled through association-managed profiles for backward compatibility. As of 2025, the core standard remains stable, with ongoing profile developments by the association. These standards also include provisions for safety extensions, such as integration with EN ISO 13849-1 for performance levels in safety-related applications.

Safety Compliance and Interoperability

AS-Interface systems achieve high through the ASi Safety at Work protocol, which complies with up to 3 (SIL 3) and ISO 13849-1 up to Performance Level e (PL e). This protocol enables the integration of -related components, such as emergency stops and safety gates, alongside standard devices on a single two-conductor cable, using techniques like cyclic redundancy checks and time stamps to ensure safe data transmission and detection of errors. The design supports flexible topologies and automatic assignment, allowing functions to operate reliably in mixed networks without dedicated safety cabling. Certification processes are managed by the AS-International Association, which accredits independent laboratories to test devices for , , and adherence to AS-Interface specifications. Vendors submit products for rigorous evaluation, including immunity tests and verification with other certified components, resulting in a that guarantees seamless operation across manufacturers. TÜV Rheinland provides additional verification for safety modules, such as safe inputs and outputs, confirming compliance with SIL 3 and e requirements through type approval and assessments. For instance, gateways like the VBG-PN-K30-DMD-S32-EV have been certified by Rheinland for dual AS-Interface networks up to these safety levels. Interoperability is facilitated by strict adherence to standardized slave profiles, with more than 200 defined profiles ensuring that devices from different vendors function plug-and-play in the network. Automatic addressing via handheld programmers or masters, combined with built-in diagnostics for error detection and localization, minimizes commissioning time and supports mixed ASi-3 and ASi-5 environments without conflicts. Testing protocols include (EMC) assessments per EN IEC 61000-6-2 for immunity and EN IEC 61000-6-4 for emissions, alongside environmental evaluations for IP67 ingress protection against dust and water, and operational temperatures from -30°C to +70°C. As of 2025, ASi-5 enhancements have bolstered safety for (IIoT) applications, incorporating integrated safety monitors and PROFIsafe over in certified gateways. These updates enable secure data exchange with higher-level buses, supporting OPC UA for IIoT connectivity while maintaining and safety integrity up to SIL 3. Devices like the Bihl+Wiedemann ASi-5/ASi-3 Gateway with integrated safety monitor exemplify this, allowing safe operation in expansive, vendor-agnostic networks.

References

  1. [1]
    AS-Interface
    Automation with AS-Interface. Welcome to AS-Interface, the efficient, easy, and worldwide standardized bus system for the lower field level.Technology · Products · News · Dates
  2. [2]
    AS-Interface | TECHNOLOGY
    ### AS-Interface Technology Summary
  3. [3]
    Facts and Data - AS-Interface
    AS-Interface history · 1990 – Numerous companies come together to initiate a system for networking sensors and actuators · 1991 – Founding of the AS-International ...
  4. [4]
    ASi-5 – easily connecting a new technology - AS-Interface
    Easily connecting a new technology. The new ASi-5 technology significantly increases the performance while making the system future-proof.
  5. [5]
    Applications - AS-Interface
    AS-Interface is used for the communication and building automation systems. The various sensors and actuators in the building communicate via the yellow cable..Missing: official | Show results with:official
  6. [6]
    ASi-5 - AS-Interface
    AS-Interface stands for easy connecting, fast and cost-effective. ASi-5 technology follows that line while enabling a significantly increased performance.
  7. [7]
    Introduction to AS-Interface (ASi) - Technical Articles - Control.com
    Sep 1, 2021 · ASi is a widely used networking technology in industry. Its main purpose is to connect field devices to programmable logic controllers (PLCs), ...Missing: overview | Show results with:overview
  8. [8]
    ORGANIZATION - AS-Interface
    AS-International is the global user organization for AS-Interface, founded in 1991 by leading industrial companies to establish a strong, independent platform ...Missing: official | Show results with:official
  9. [9]
    https://standards.iteh.ai/catalog/standards/clc/625dff8a-65b8-4c47-9e23-470dfda20ca2/en-50295-1999
  10. [10]
    https://webstore.iec.ch/publication/65473
  11. [11]
    AS-Interface - Wikipedia
    AS-Interface is a networking alternative to the hard wiring of field devices. It can be used as a partner network for higher level fieldbus networks.History · Technology · ASi-3 communication and... · ASi-5 communication and...Missing: overview | Show results with:overview
  12. [12]
    Entering new dimensions with ASi-5 - Bihl+Wiedemann GmbH
    In the meantime, there are 37 million standard devices and 8 million safety devices in use, with more than 2000 certified products for all kinds of ...Missing: early | Show results with:early
  13. [13]
    [PDF] SEW-EURODRIVE will now integrate ASi-5 - AS-Interface
    SEW-EURODRIVE implemented AS-Interface into the modular automation system MOVI-C® and integrates ASi-5 into automation products.Missing: 2022-2025 | Show results with:2022-2025
  14. [14]
    FAST AND SAFE INTO THE IIOT WITH ASi-5
    Oct 13, 2023 · ... ASi-5 but also their ASi-5/ASi-3 fieldbus gateways with OPC UA interface ensure future-proof connectivity with IT systems.
  15. [15]
    [PDF] GEMÜ 4242 ASi-5 - GEMU Group
    Sep 18, 2025 · The GEMÜ 4242 combi switchbox is suitable for installation on pneumatically operated linear actuators. The position of the valve spindle is ...Missing: September | Show results with:September
  16. [16]
    AS-Interface - Bihl+Wiedemann GmbH
    Which facts and data are known about the AS-Interface market? Over 40 million ASi devices in use worldwide; Over 7 million of them are safety devices; More ...
  17. [17]
    AS-International Association - Automation World
    The AS-International Association was founded in 1991 as a user group for manufacturers and users of the AS-Interface® system. The task of the User Group is ...
  18. [18]
    NEWS - AS-Interface
    The numbers speak for themselves: With a staggering 850 exhibitors and a record-breaking 42,985 registrants, Automate 2024 was the largest show in history.
  19. [19]
    Packaging technology - Bihl+Wiedemann GmbH
    Packaging automation is an ideal field of application for AS-Interface (ASi). This is because the advantages of our hassle-free wiring system come into ...
  20. [20]
    Packaging automation – AS-Interface | Einfach automatisieren mit ...
    Application examples for packaging automation. AS-Interface can be used in shrink wrapping, palletizing and pallet stretchers, as well as strapping machines.
  21. [21]
    Sustainable automation with AS-Interface: Less connectors
    Apr 19, 2024 · This explains why, depending on the machine or system layout, ASi can reduce wiring costs by almost 70 percent compared to other fieldbus ...Missing: benefits factory
  22. [22]
    AS-Interface - Bihl+Wiedemann GmbH
    AS-Interface (ASi) is a globally standardized fieldbus system for the first level of automation. The abbreviation ASi stands for Actuator-Sensor Interface.Missing: official | Show results with:official
  23. [23]
    Process automation with AS-Interface - Bihl+Wiedemann GmbH
    Thanks to the greatly reduced wiring effort with AS-Interface, you save assembly and material costs. This saves valuable resources. More information!Missing: factory | Show results with:factory
  24. [24]
    ASi-5: high-performance data shuttle for digitalization in process ...
    Discover ASiMAG, your premier source for AS-Interface insights, featuring articles on applications and solutions using this industrial automation standard.
  25. [25]
    [PDF] w w w .ifm .co m
    The Actuator Sensor Interface is a hot-pluggable alternative to conventional wiring ... The heart of the system is the AS-Interface master or the AS-Interface ...
  26. [26]
    Factory 56 - Mercedes Benz - AS-Interface
    The key is the ASi-5 communication technology, connecting the control unit with an integrated touchscreen to up to 96 receiver devices via a unique two- ...
  27. [27]
    [PDF] Systems - AS-Interface • IO-Link • PROFIBUS
    Mar 5, 2010 · http://www.siemens.com/as-interface/master. Transmission rates per AS-Interface line. • AS-Interface bus cycle time ms. 5 (for 31 slaves). 10 ...
  28. [28]
    The next generation of AS-Interface - Control Design
    Oct 10, 2019 · Now a new generation of the ASi standard has been presented for the new requirements in times of Industry 4.0. ASi-5 easily enables faster ...
  29. [29]
    [PDF] AS-INTERFACE SAFETY AT WORK - Schmersal USA
    DESCRIPTION. Fast mounting, smooth installation. The AS interface enables fast mounting and installation of the components in the safety circuit.Missing: early | Show results with:early
  30. [30]
    https://products.schmersal.com/upload/orig/10/00/20/05/DOC_MAN_SYS_sh-asmm-2m-asgg-2m_SEN_AIN_V2.pdf
  31. [31]
    [PDF] AS-i 3.0 PROFINET Gateway with integrated Safety Monitor
    Jun 17, 2006 · The safety AS-i system is intended for safety applications up to Category 4/. SIL 3. Mixed operation of standard components and safe components ...
  32. [32]
    Video PROFIsafe and CIP Safety - Bihl+Wiedemann GmbH
    05 - PROFIsafe and CIP Safety (2:12). Jochen Bihl explains how easy it is to integrate the ASi safety technology with safe Siemens or Rockwell drives.
  33. [33]
    Building automation - AS-Interface
    AS-Interface makes building automation easier in many respects. Transmitting data on two cables significantly reduces the installation and commissioning effort ...
  34. [34]
    FAST AND SAFE INTO THE IIOT WITH ASi-5
    Oct 13, 2023 · Using the ASi-5/ASi-3 gateway as an edge device, data from smart factory devices such as decentralized inverters are made available for further ...
  35. [35]
    [PDF] AS-INTERFACE - Konvex Electric
    □ High noise immunity during data transfer. □ Extensive diagnostic function. □ Automatic addressing when the device is replaced. □ Flexible system ...
  36. [36]
    [PDF] ASi-5 - AS-Interface
    The technology innovation ASi-5 is downward compatible. ASi-5 can easily be included into existing networks. Without any doubt. Mixed operation with ASi-3 and ...
  37. [37]
    [PDF] AS-Interface Introduction - Siemens
    Acquisition of safety-related signals via safe input slaves on the AS-Interface bus. Further signals can be detected through other F-DI modules of the SIMATIC.<|control11|><|separator|>
  38. [38]
    User Advantages - ASi-5 - AS-Interface
    Optimized spare parts management. Reduced implementation cost through improved master/slave ratio; Larger networks; Significantly increased number of end- ...
  39. [39]
    [PDF] EL6201, EL9520 - EtherCAT Terminals for AS-Interface - download
    Standardized economic efficiency. All AS-Interface products conform to the European standard EN 50295 and the world standard IEC 62026-2. Certified: Economic ...<|separator|>
  40. [40]
    [PDF] Industrial communication made simple: with AS-Interface.
    What is AS-Interface? The actuator-sensor interface (AS-i) is a manufacturer-independent standard for connection of sensors and actuators of the.Missing: history | Show results with:history
  41. [41]
    ASi Cable ▷ Simple and Efficient Power Distribution
    The ASi cable is a flat, unshielded, two-wire cable that transmits data and power, with a black cable for higher power needs. It has a mechanically coded ...Missing: voltage | Show results with:voltage
  42. [42]
    https://www.ifm.com/us/en/us/learn-more/as-interface/as-interface-system-overview
  43. [43]
    A Comparison of ASi-3, ASi-5, and IO-Link - Pepperl+Fuchs Blog
    Jun 16, 2025 · Learn where to use ASi-3, ASi-5 and IO-Link, and what are the advantages and differences between the AS-Interface and IO-Link communication ...
  44. [44]
    https://www.ifm.com/us/en/product/AC1209
  45. [45]
    ASI - SMAR Technology Company
    The AS-International Association or AS-Interface UK Expert Alliance is a user group founded in 1991 by companies and users of the AS-InterfaceÒ system. The ...
  46. [46]
    [PDF] AS-Interface Spec. V3.0 Compliant Universal AS-i IC
    Jan 26, 2016 · The AS-Interface Complete Specification V3.0 describes the input impedance behavior of a slave module by an equivalent circuit that consists of ...
  47. [47]
    [PDF] The AS-interface - RS Online
    The AS-interface. 2.2 Basic specifications of the AS interface. Topology: any of: line, star, tree, ring. Number of users: 31 AS-interface slaves, or. 248 ...Missing: core | Show results with:core
  48. [48]
    [PDF] AS-Interface Installation Guidelines Tips and Tricks - Pepperl+Fuchs
    Address Allocation for Slaves. □ For AS-Interface 31 slave addresses are available. □ There is a difference between standard address allocation and extended ...
  49. [49]
    [PDF] System Manual AS-Interface system ASIsafe - Support
    Safety Guidelines. This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent damage to property.
  50. [50]
    AS-Interface master module Modicon Quantum - 30 V DC
    Via AS-Interface line. [Us] rated supply voltage, 30 V DC. AS-i cabling system cycle time, 156 x (n + 1) µs 31 156 x (n + 2) µs. Transmission Rate, 167 kbit/s.
  51. [51]
    Safety at Work - AS-Interface
    This system meets the highest functional safety requirements, reaching up to PL e (EN ISO 13849) and SIL 3 (IEC 61508), while requiring minimal installation and ...Missing: TÜV | Show results with:TÜV
  52. [52]
    https://www.as-interface.net/en/technology/safety-at-work
  53. [53]
    [PDF] ASi-5 - AS-Interface
    Detects whether the same address has been assigned to two ASi slaves. Frequent error when using a handheld addressing device. Checks the ASi line for ...
  54. [54]
    ASi-5 at SPAX - AS-Interface
    These few and simple changes now make predictive maintenance possible, since the connected IO-Link devices no longer provide just digital values, but rather ...
  55. [55]
    MEST EN 62026-2:2015
    The complete system is called 'Actuator Sensor interface (AS-i)'. This second edition of IEC 62026-2 cancels and replaces the first edition published in 2000.
  56. [56]
    GB/T 18858.2-2012 English PDF
    Oct 26, 2025 · This part replaces GB/T 18858.2-2002 "Low-voltage switchgear and control equipment controller - device interfaces - Part 2. Executive Actuator sensor interface ...
  57. [57]
    What is Actuator Sensor Interface? - Engineers Garage
    Nov 30, 2022 · The interface allows connecting 31 or 62 slave devices within 100 meters. The range can be extended up to 300 meters using repeaters. The ...
  58. [58]
    Certification - AS-Interface
    The AS-Interface certification signifies that a product has been developed in compliance with the AS-Interface specifications. All AS-Interface network ...Missing: profiles | Show results with:profiles
  59. [59]
    VBG-PN-K30-DMD-S32-EV AS-Interface Gateway/Safety Monitor
    This gateway/safety monitor connects to PROFINET IO, is certified up to SIL 3 and PL e, and has a double master for 2 AS-Interface networks.
  60. [60]
    [PDF] AS-i Analog Modules, IP67, M12 - AS-Interface
    Environment. Applied standards. EN 61000-6-2. EN 61000-6-4. Operating altitude max. 2000 m. Ambient temperature. -30 °C … +70 °C. Storage temperature. -30 °C …
  61. [61]
    ASi-5/ASi-3 PROFINET Gateway with integrated Safety Monitor
    ASi-5 – Great data bandwidth, short cycle times · PLC Independent Safety Technology · Safe Link; OPC UA interface and REST API for IIoT applications; Integrated ...Missing: enhancements | Show results with:enhancements