Honeywell RM7865C1007 Burner Control Modules
The Honeywell RM7865C1007, also cataloged as the RM7865C Burner Control Unit, operates as a dedicated hardware component for microprocessor-based sequence execution and flame monitoring within 7800 Series burner management systems.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | RM7865C1007 |
| Brand | Honeywell |
| Origin | USA |
| Weight | 0.71 kg (1.57 lbs) |
| Dimensions | 127 mm x 127 mm x 77 mm (5 in. x 5 in. x 3-1/32 in.) |
| Operating Temp | -40 deg C to +60 deg C |
| Power Consumption | 10 W maximum |
| Supply Voltage | 120 VAC (+10%, -15%) |
| Frequency | 50 Hz / 60 Hz (+/-10%) |
| Pre-Purge / Post-Purge | 35 sec |
| Pilot Flame Establishing Period | 2 sec |
| Main Flame Establishing Period | 4 sec |
| Replaces Model | RM7865A1009 |
| Required Subbase | Q7800 Universal Wiring Subbase |
| Required Flame Amplifier | R7847, R7848, R7849, or R7886 Flame Signal Amplifier |
| Vibration Tolerance | 0.5 G environment |
| Approvals | UL Listed, CSA Certified, FM Approved, FCC Part 15 Class B |
Channel-to-Channel Isolation & DCS Flame Loop Signal Interfacing
The Honeywell RM7865C1007 features galvanic channel-to-channel isolation barriers that electrically separate high-voltage safety interlock inputs and valve drive outputs from internal low-voltage microprocessor control logic. Designed for integration with plant distributed control systems (DCS) and industrial PLCs, the module communicates sequence timing, lockout codes, and dynamic flame signal values through optional Modbus network interfaces and 4-20 mA HART loop protocol adapters. Internal diagnostic circuits continuously test safety relay contacts and execute dynamic self-checking logic without injecting electrical noise or signal offsets into external monitoring loops.
Frequently Asked Questions
Q: Is the RM7865C1007 designed to support hot-swapping on an active wiring subbase?
A: No. Line voltage to the Q7800 wiring subbase must be isolated prior to insertion or removal. Attempting to hot-swap the module while energized can lead to contact arcing on edge connector pins and permanent logic degradation.
Q: How does the module maintain stored sequence status and fault diagnostic logs during power interruptions?
A: Operating parameters, historical lockout fault codes, and sequence timing data are written directly to internal nonvolatile memory, retaining all critical system records during complete mains power failure.
Q: What safety actions occur if an artificial flame signal is present during the standby state?
A: The RM7865C1007 executes an automated safe-start check during standby. If a flame signal is detected prior to sequence initiation, the unit inhibits burner startup, holds sequence execution, and asserts a safety lockout condition.
Field Installation Guidelines
Mount the RM7865C1007 into a compatible Q7800 Universal Wiring Subbase enclosed within a NEMA-rated industrial panel. Disconnect all 120 VAC main power sources before aligning the connector pins and pressing the relay module firmly into place.
Flame sensor signal wiring must be isolated inside grounded, metallic conduit separate from high-voltage ignition transformer leads and heavy inductive motor wiring. Connect the subbase grounding terminal to the main panel earth bus with a low-impedance copper conductor. Torque terminal connection screws to 0.8 Nm - 1.1 Nm to maintain solid physical and electrical contact across field wiring points.
Honeywell RM7865C1007 Burner Control Modules
Honeywell RM7865C1007 Burner Control Modules
The Honeywell RM7865C1007, also cataloged as the RM7865C Burner Control Unit, operates as a dedicated hardware component for microprocessor-based sequence execution and flame monitoring within 7800 Series burner management systems.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | RM7865C1007 |
| Brand | Honeywell |
| Origin | USA |
| Weight | 0.71 kg (1.57 lbs) |
| Dimensions | 127 mm x 127 mm x 77 mm (5 in. x 5 in. x 3-1/32 in.) |
| Operating Temp | -40 deg C to +60 deg C |
| Power Consumption | 10 W maximum |
| Supply Voltage | 120 VAC (+10%, -15%) |
| Frequency | 50 Hz / 60 Hz (+/-10%) |
| Pre-Purge / Post-Purge | 35 sec |
| Pilot Flame Establishing Period | 2 sec |
| Main Flame Establishing Period | 4 sec |
| Replaces Model | RM7865A1009 |
| Required Subbase | Q7800 Universal Wiring Subbase |
| Required Flame Amplifier | R7847, R7848, R7849, or R7886 Flame Signal Amplifier |
| Vibration Tolerance | 0.5 G environment |
| Approvals | UL Listed, CSA Certified, FM Approved, FCC Part 15 Class B |
Channel-to-Channel Isolation & DCS Flame Loop Signal Interfacing
The Honeywell RM7865C1007 features galvanic channel-to-channel isolation barriers that electrically separate high-voltage safety interlock inputs and valve drive outputs from internal low-voltage microprocessor control logic. Designed for integration with plant distributed control systems (DCS) and industrial PLCs, the module communicates sequence timing, lockout codes, and dynamic flame signal values through optional Modbus network interfaces and 4-20 mA HART loop protocol adapters. Internal diagnostic circuits continuously test safety relay contacts and execute dynamic self-checking logic without injecting electrical noise or signal offsets into external monitoring loops.
Frequently Asked Questions
Q: Is the RM7865C1007 designed to support hot-swapping on an active wiring subbase?
A: No. Line voltage to the Q7800 wiring subbase must be isolated prior to insertion or removal. Attempting to hot-swap the module while energized can lead to contact arcing on edge connector pins and permanent logic degradation.
Q: How does the module maintain stored sequence status and fault diagnostic logs during power interruptions?
A: Operating parameters, historical lockout fault codes, and sequence timing data are written directly to internal nonvolatile memory, retaining all critical system records during complete mains power failure.
Q: What safety actions occur if an artificial flame signal is present during the standby state?
A: The RM7865C1007 executes an automated safe-start check during standby. If a flame signal is detected prior to sequence initiation, the unit inhibits burner startup, holds sequence execution, and asserts a safety lockout condition.
Field Installation Guidelines
Mount the RM7865C1007 into a compatible Q7800 Universal Wiring Subbase enclosed within a NEMA-rated industrial panel. Disconnect all 120 VAC main power sources before aligning the connector pins and pressing the relay module firmly into place.
Flame sensor signal wiring must be isolated inside grounded, metallic conduit separate from high-voltage ignition transformer leads and heavy inductive motor wiring. Connect the subbase grounding terminal to the main panel earth bus with a low-impedance copper conductor. Torque terminal connection screws to 0.8 Nm - 1.1 Nm to maintain solid physical and electrical contact across field wiring points.
