Honeywell FF-SRS5939 dual channel interface control module is a safe emergency stop control module for electrosensitive protection devices. The module has a 24 Vdc power supply voltage, dual input and two cross-monitored relays with guided contacts, providing two normally open contacts and one normally closed contact. The module also has a 1mA-6A closing current, a 15ms response time, an optional automatic or manual restart mode, an optional final switch device monitoring circuit, an LED indicating input and output status and restart status, and a removable wiring board for easy maintenance.