Multiple safety functions from single device

The industry automation division of Siemens, Germany, has introduced the Sirius 3RK3 modular safety system. It is suitable for most applications where a number of safety functions have to be evaluated but where it would be too costly to wire together several switching devices. With a capability halfway between a simple safety relay and a fail-safe controller, the system allows connection of up to seven expansion modules. www.automation.siemens.com