Interfaces in WERMA systems


The right connection for your application


From standardised protocols to customised integrations - gain insight into the variety of interfaces that WERMA products have mastered, to meet your requirements and ensure seamless system solutions.

IO-Link

New standards with IO technology.

IO-Link defines the standard for global IO technologies (IEC 61131-9), enables communication with both sensors and actuators, and thus represents the future of networking. Consisting of an IO-Link master and various components with an IO-Link interface, such as signal towers (sensor, actuators or both), IO-Link presents itself as a dynamic point-to-point interface.


In contrast to conventional bus systems, IO-Link is limited to 15 metres, but the possibility of integrating bus systems means that greater distances between the PLC and machine can be bridged without any problems.


The downward compatibility of IO-Link enables seamless integration into existing systems. Wiring is straightforward using a conventional 3-core, unshielded cable (voltage and IO-Link port). If a component, such as the master, fails, the new master learns from its counterpart, such as a sensor. Continuous communication takes place via the IODD protocol. Previously required direct configuration of the sensors on the device is now carried out in real time by the central control system. IO-Link revolutionises connectivity and brings efficiency in real time.

AS-Interface

Efficient networking for modern automation technology.

AS-Interface, recognisable by its characteristic yellow cable, represents an advanced networking solution in automation technology.


This innovative technology offers many advantages of larger and more expensive fieldbuses at a much lower price. The "master" automatically organises communication in the network, exchanges process images and diagnostic data with the higher-level controller and recognises connected devices without user configuration. The AS-Interface master does not require any application-specific software.


The network topology is extremely flexible and supports various structures, especially tree-shaped structures. In contrast to ring and line structures, slaves can be integrated at any optimum point, whereby branches can be realised easily and flexibly - even to moving system parts.


WERMA Signaltechnik GmbH + Co KG has been a proud member of the AS-Interface® Association since 1996, and we successfully use this innovative networking solution in our products.