Safety relay INT-22.5R1-24

3 NOemergency stopDIN rail

- Basic device to EN 60204-1 and EN 954-1 - Safety category 4 to EN954-1 - Stop category 0 to EN 60204-1 - Manual or automatic start - Cross monitoring - Feedback circuit for monitoring external contactors - 3 enabling current paths - Equivalent and non-equivalent activation This device is a two-channel safety switching device with self-monitoring on each ON-OFF cycle. It conforms to EN 60204-1 and is equipped with positively driven relays. It is intended for monitoring connected switching elements on separating safety devices and generating a safety-oriented output signal (enable). Depending on the design, separating safety devices may include protective screens, safety doors, enclosures, covers, screens, etc. Basic Function: After supply voltage has been connected to terminals A1/A2 and the safety inputs closed, operating the reset button closes the enabling current paths (manual start). When the safety inputs are opened the enabling current paths will open. Operating modes / system functions Two-channel activation The device uses two-channel activation. With equivalent activation safety channel CH2 via negative potential. With non-equivalent activation both safety channels are connected to positive potential. Cross-monitoring With equivalent activation cross monitoring is achieved by means of the short-circuit principle; with non-equivalent activation it is achieved through functional density. Manual start When the safety inputs are closed, a button is used to close reset input S34 and then open it again (triggering with failing edge) or to close reset input S35 (triggering with rising edge).