Dortronics Systems Inc.
The Interlock Controllers incorporate a unique watchdog circuit that constantly monitors operation. Also featured are LED indicators for input-output connection status, and system busy or system idle confirmation. The 4700 Series includes suppression protection on all outputs to prevent inductive load locking devices from damaging the circuitry. Additional features include interlock violation alarm relay output; 4 DPDT relays (three powered and one dry contact for signaling); panic release and custom programmable propped door, panic release and door unlock timers.