The WD2 is a PLC version of the Watchdog Timer. Up to 8 MS speed switches can be monitored with each input having its own 8 amp output. The WD2 is shipped programmed with a 4 sec. delayed output. Field modification to the delayed time can easily be programmed via the display screen on the WD2. Din rail mounting and 120v AC powered, the WD2 is a great option when your application requires multiple WD1’s but is not large enough to need a stand-alone PLC system.