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Help CenterHoneywell 7800 SERIES RM7890D, RM7895E,F Relay Modules Spot Goods
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FEATURES
Safety features:
Access for external electrical voltage checks.
Dynamic airflow switch check feature (RM7895F).
Application flexibility.
Dependable, long-term operation provided by microcomputer technology.
Five Light Emitting Diodes (LEDs) for sequence information, see Fig. 1.
Interchangeable plug-in flame amplifiers.
Nonvolatile memory; retains history files and sequencing status after loss of power.
Selectable recycle or lockout on loss of airflow (RM7895E,F).
Selectable recycle or lockout on loss of flame.
OPTIONAL FEATURES
Communication interface capability. ï First-out annunciation and system diagnostics are provided by a 2 row by 20 column Vacuum Fluorescent Display (VFD) located on the optional KDM.
First-out expanded annunciation with 26 LEDs for limits and interlocks.
Local or remote annunciation of RM7890D, RM7895E,F operation and fault information.
Report generation.
Remote reset.
Burner controller data using S7800 Keyboard Display:
Expanded annunciator status.
Flame signal strength.
APPLICATION The Honeywell RM7890D, RM7895E,F is a microprocessor based integrated burner control for automatically fired gas, oil, or combination fuel single burner Infrared Heater applications. The RM7890D, RM7895E,F System consists of the Relay Module, Wiring Subbase and Amplifier. A Purge Card is required for the RM7895E,F to complete the system. Options include Keyboard Display Module (KDM), Personal Computer Interface, DATA CONTROLBUSô MODULE, Remote Display Module, First-Out Expanded Annunciator and COMBUSTION SYSTEM MANAGERô Software. The Relay Module is programmed to provide a level of safety, functional capability and features beyond the capacity of conventional controls. Functions provided by the RM7890D, RM7895E,F include automatic burner sequencing, flame supervision, system status indication, system or self-diagnostics and troubleshooting. Higher impressed flame rod voltage makes the RM7090D, RM7895E,F suitable for infrared heaters and some unstable/ hard to sense flame rod applications.
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