The Sentry series from ABB covers the entire range of safety relays, from basic models for simple safety applications or for the multiplication of safety outputs, to highly flexible universal models with extremely accurate timer functions. The series thus covers all requirements for safety applications. Manual or automatic reset can be selected easily with a switch on the front of the relay. The new multi-reset function enables the resetting of up to 10 safety relays Sentry with only one reset button. The BSR basic models are suitable for emergency stop shutdowns, for example, or for extending safety outputs. The single function models SSR are suitable for applications such as the monitoring of contacts and OSSD signals or for two-hand switching. The TSR safety timer is characterized by its very high accuracy of better than 1 %, and the USR universal models for all common safety applications offer additional display and configuration options.
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