BIRCHER  AG CH-8222 SAFETY RELAY SWITCHING UNIT

Description

BIRCHER  AG CH-8222 SAFETY RELAY.
Switching Units monitor tactile signal sensors such assafety mats, contact strips and bumper systemsFunctionConnected Sensors have a terminal resistance of 8.2 kOhmand are monitored for changes in the continuously flowingno-load current. In the non-activated condition both relaysare energised.
When one or more Sensors are activated
• the total resistance sinks towards zero ohm
• if the value falls below the defined threshold (6.2 kOhm)
• the relays are de-energised• the yellow LED illuminatesWhen a Error occurs in the Sensor circuit
• the total resistance rises towards infinity if the valuerises above the defined threshold (11 kOhm)
• the relays are de-energised• the red LED illuminates
Condition is Used. Shipped with USPS Priority Mail.