AS-Interface Safety at Work Schmersal

Application:
Easy, safe and reliable
AS-Interface Safety at Work (SaW) is the first safety bus system based upon the open standard of AS-International. Safety components such as Emergency Stop command devices, safety switches, solenoid interlocks or safety light curtains are simply connected to the yellow AS-Interface cable. For the evaluation of the safety signals a “Safety Monitor” is merely added to the AS-Interface system.

Design and mode of operation:
AS-Interface Standard in accordance with EN 50295
With the integration of AS-Interface SaW the AS-Interface network will continue to operate unchanged. The well known components, like the standard AS-Interface master, the standard power supply as well as the AS-Interface yellow cable will still form the basis of all AS-Interface installations. Therefore an existing machine can easily be equipped with additional AS-i SaW components.

The heart of safety
The safety monitor analyses all transmitted information from each safety device on the AS-Interface network and, in case of a safety device being activated or in case of a fault in one of the safety devices, the safety monitor immediately shuts down to create a safe condition. The safety monitor is equipped with one or two redundant pairs of enabling paths for applications up to Control Category 4 according to EN ISO 13849-1. Each safety function of the monitor can be set with a simple drag & drop software. Afterwards the configuration is downloaded into the safety monitor and protected with a password.

Safe transmission mechanism
The communication protocol for safety relevant applications is based on the unchanged AS-Interface Standard transmission. With each AS-Interface master call each safety device answers in return with a preset data telegram. This information is analysed and in case of a deviation from the pre-set values the enabling paths are opened. The maximum response time for a safe shutdown is 40 ms.

Cost reduction with AS-Interface Safety at Work
Reduce cost and installation time – A never ending story. During installation and machine commissioning as well as during maintenance, AS-Interface SaW supports the user with integrated system diagnosis. It provides detailed information about the cause and place of the failure, and enables the user to quickly find and analyse a malfunction and therefore minimise machine downtime. With AS-Interface Safety at Work you can directly reduce your cost.

More flexibility with AS-Interface Safety at Work
For the realisation of individual safety solutions, SCHMERSAL offers the maximum amount of flexibility with its diverse range of safety devices. Depending on the application the user can choose the optimal solution out of an extensive product basket. As AS-Interface SaW is an open system, the user has also the possibility to include additional Safety components from other suppliers. AS-Interface Safety at Work fulfils the safety requirements to the highest standards.

Less installation time with AS-Interface Safety at Work
Easier and quicker with AS-Interface SaW: Choose a Safety device – Connect it to the yellow AS-Interface cable – Configure the safety function in the safety monitor. – That’s it.
No further settings are required at each of the safety devices, the bulky parallel wire cables between the safety devices in the field and the switching cabinet are reduced and wiring time is decreased. The power supply for all safety sensors is supplied over the single yellow AS-Interface cable.

AS-Interface SaW System Features
• Up to 31 standard and safety slaves on the AS-Interface system
• No Safety PLC necessary
• Safety-relevant signals can be allocated into groups and multiple Safety monitors may be connected
• Response time is max. 40 ms
• Safety-relevant signals can be integrated into plant diagnostics
• Certified up to Control Category 4 in accordance with EN 954-1
• Certified by the TÜV (German Technical Inspectorate)