PLCs, Power Supplies & Others

The Honeywell RM7800L1087 keyboard display module offers a direct interface for the RM7800 relay module, enabling local monitoring and configuration of burner management systems . This display provides real-time operational feedback and detailed system diagnostics . It is an accessory to the core relay module and not required for basic operation .

Technical Specifications of Honeywell RM7800L1087

The Honeywell RM7800L1087 features a Vacuum Fluorescent Display (VFD) that shows sequence status, timing information, and lockout fault codes . The second line of the display can show selectable or preemptive diagnostic messages . A five-function Run/Test switch on the module permits sequence modification for testing and commissioning . It retains history files and lockout status in nonvolatile memory even after a power loss . The module comes standard with the S7800A1142 Keyboard Display .

Key Features and Diagnostics

The Honeywell RM7800L1087 provides visual feedback through five LEDs that indicate POWER, PILOT, FLAME, MAIN, and ALARM statuses . A blinking POWER LED signals a fault code during a lockout condition . The display’s first line shows current burner sequence status and remaining timing in minutes and seconds . Preemptive messages appear in parentheses and provide detailed support information .

Integration and Application

The Honeywell RM7800L1087 mounts on the RM7800 relay module and connects through the Q7800 wiring subbase . You need this keyboard to set up the Valve Proving feature and change the post-purge time . This module is ideal for commercial and industrial burner management systems.

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