Honeywell R7120M1019 7800 Series Burner Control Module

Configured for integrated relay control, flame signal amplification, and purge execution in industrial combustion systems, the Honeywell R7120M1019 (R7120M Burner Control Module) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

Hardware Specifications

Process Loop Signal Conditioning & Channel Isolation

The module incorporates dedicated signal processing circuitry engineered for high-integrity 4-20 mA HART loop protocol compatibility and isolated analog channel conditioning. Multi-stage cold junction compensation (CJC) maintains thermal accuracy across ambient transitions, while channel-to-channel isolation suppresses common-mode noise interference during flame monitoring cycles. The internal bus structure enables deterministic signal routing to optional sub-modules including the S7800A1142 Keyboard Display Module (KDM) and DataControlBus interface via high-noise-immunity physical layers.

Frequently Asked Questions

Q: What fault diagnostic indication is provided directly on the module hardware?

A: The module executes fault detection by flashing coded fault sequences via the POWER LED during alarm shutdowns, providing immediate operational diagnostic state feedback.

Q: Is hot-swapping permitted during active burner operation?

A: No. Electrical power to the subbase must be isolated prior to removing or installing the module to prevent electrical arcing, damage to internal microcomputer circuits, or unintended system trips.

Field Installation Guidelines

1. Mount the subbase securely within an IP54 or NEMA 4 rated enclosure to protect against environmental contaminants and excessive moisture.
2. Ensure high-voltage ignition wiring is routed in a dedicated grounded conduit separate from sensor signal lines and communication cables to avoid electromagnetic interference.
3. Verify that the 15 A Fast Blow fuse (Type SC or equivalent) is correctly installed in the supply loop before applying 120 Vac operating power.
4. Terminal wiring must conform to local electrical codes using wire rated for the maximum ambient operating temperature (-40 deg C to +60 deg C).