Brochure/Catalogue

Functional safety
Relays for processing safety-related signals
Industrial safety has become an important focus topic. There is an increasing
demand for safety systems. At the same time, the demands placed on such
systems are increasing. In order to provide optimum protection for plant, users,
goods and the environment, dangers and incidents of all kinds should be avoided.
This is also evident from the increasingly strict international standards and
directives.
We have specially-developed safety relays for processing safety-related signals in
our product range. They achieve a safety integrity level of up to SIL3 in accordance
with EN 61508 and can therefore be used flexibly in the process industry.
Relay modules with positively-driven contacts
Relay modules with positively-driven contacts are used in safety-related
applications to provide reliable feedback on the switching state of the operating
contact to the control system. They enable safe diagnosis via a positively-driven
NC contact and ensure the reliable exchange of signals between two systems with
feedback function. In elementary relays with positively-driven contacts, NO and
NC contacts are mechanically connected to each other. This means that NO and
NC contacts can never be closed at the same time, so that a diagnostic coverage
of 99 % is achieved.
C.102 2737920000
Application range
C
Functional safety – Overview