ModBus Module, Operates as ModBus RTU Slave Device, 13Vdc Peak Fullwave Rectified Voltage, Includes 8 Pin Electrical Connector, Provides Ability to Remotely Mount the S7800 Keyboard Display Module, -40-140 Degree Ambient Temperature Range, No Reset Allowed

Remote Reset Module, Serves as Link Between Remote Reset Push Button and Relay Module, Reset Button can be Installed up to 1000 Feet Away, -40-140 Degree Ambient Temperature Range

First Out Expanded Annunciator, 120Vac, For Support of 7800 Series Relay Modules for First Out Annunciation, Sequencing, System or Self Diagnostics and Troubleshooting, 21 Monitored Contact Points