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Honeywell RM7890A1015 Burner Control Relay Module
Honeywell RM7890A1015 Burner Control Relay Module
Brand/Manufacturer: Honeywell
Order Number: RM7890A1015
Type: Burner Control Modules
Country of Origin: Sweden
Condition: Original Brand
Lead Time: Available in stock
Payment Term: 100% TT In Advance
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Description
The Honeywell RM7890A1015, also cataloged as the RM7890A1015 Burner Control Unit, operates as a dedicated hardware component for on-off primary control and flame sequence execution within 7800 SERIES combustion platforms. It mounts directly onto a wiring subbase to supervise intermittent pilot ignition, nonvolatile memory status storage, five-LED diagnostic sequencing, and 120 VAC fuel shutoff valve circuits across single-burner gas or oil applications.
Suffix Breakdown & Model Matrix
- RM7890A1015: Current production primary relay module equipped with nonvolatile memory and five diagnostic status LEDs (Direct replacement for RM7890A1007).
- RM7890A1007: Legacy base release (Discontinued by manufacturer, superseded by RM7890A1015).
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | RM7890A1015 |
| Brand | Honeywell |
| Origin | USA / Mexico |
| Weight | 2.40 lbs (1.09 kg) |
| Dimensions | 127 mm x 127 mm x 133 mm (with Q7800 subbase) |
| Operating Temp | -40 deg C to +60 deg C |
| Power Consumption | 10 W nominal |
| Supply Voltage | 120 VAC (+10%, -15%), 50/60 Hz |
| Status Display | 5 Diagnostic LEDs (Power, Pilot, Flame, Main, Alarm) |
| Pilot Flame Establishing Period | Selectable 4 s or 10 s |
| Memory Type | Nonvolatile Memory |
Process Control and DCS Interface Features
The unit relies on internal channel-to-channel isolation to decouple low-voltage micro-ampere flame detection circuits from 120 VAC heavy-duty output relays. Operational sequence timing, real-time flame signal voltage, and historical diagnostic lockout metrics pass through the integrated serial ControlBus connection, enabling direct integration into plant DCS networks and PLC automation architectures without degrading safety interlock loop integrity.
Frequently Asked Questions
Q: Does the RM7890A1015 directly replace the older RM7890A1007 relay module?
A: Yes, the RM7890A1015 is the direct functional and mechanical replacement for the legacy RM7890A1007 module, mating directly with existing Q7800 subbases.
Q: Is an external ST7800 purge card required for the RM7890A1015 to operate?
A: No, the RM7890A1015 functions as an on-off primary control without a purge timing requirement, though it still requires a plug-in flame signal amplifier and Q7800 subbase.
Field Installation Guidelines
- Disconnect and lock out all 120 VAC power supplies feeding the Q7800 subbase prior to installing or removing the module.
- Verify subbase card-edge connector terminals are clean and straight to ensure proper electrical pin alignment.
- Seat the module firmly onto the subbase receptacle and tighten the central captive retaining screws to resist industrial vibration.
- Maintain physical separation of at least 150 mm between low-voltage flame sensor lines, serial ControlBus wiring, and high-voltage ignition transformer leads.
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Testimonials
Fast Delivery, Excellent Quality
We’ve worked with IndustriaX Limited on several urgent orders for automation components. Their ability to provide original, factory-sealed parts with full documentation—often from in-stock inventory—has significantly reduced our downtime. The delivery is consistently fast, and their logistics team is highly responsive. IndustriaX has become one of our most trusted global suppliers for industrial spare parts.
- Sarah Johnson
We’ve worked with IndustriaX Limited on several urgent orders for automation components. Their ability to provide original, factory-sealed parts with full documentation—often from in-stock inventory—has significantly reduced our downtime. The delivery is consistently fast, and their logistics team is highly responsive. IndustriaX has become one of our most trusted global suppliers for industrial spare parts.
- Sarah Johnson
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Finding authentic automation parts has always been a challenge, especially for discontinued models. IndustriaX Limited has impressed us with their genuine stock, clear product traceability, and prompt updates. We’ve verified their shipments against OEM specs multiple times, and the results are flawless. They’re now our preferred sourcing partner for critical systems.
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Finding authentic automation parts has always been a challenge, especially for discontinued models. IndustriaX Limited has impressed us with their genuine stock, clear product traceability, and prompt updates. We’ve verified their shipments against OEM specs multiple times, and the results are flawless. They’re now our preferred sourcing partner for critical systems.
- David Smith
Professional Service with After-Sales Support"IndustriaX Limited doesn’t just ship products—they provide solutions. When we encountered installation issues with one of the modules, their technical team replied in less than 4 hours and provided wiring guides and troubleshooting tips. This level of post-sale support is rare in the spare parts sector. Their professionalism gives us confidence in every order."
- Emily Brown
"IndustriaX Limited doesn’t just ship products—they provide solutions. When we encountered installation issues with one of the modules, their technical team replied in less than 4 hours and provided wiring guides and troubleshooting tips. This level of post-sale support is rare in the spare parts sector. Their professionalism gives us confidence in every order."
- Emily Brown
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We've tested multiple suppliers over the years, but IndustriaX Limited consistently stands out. Their product catalog is extensive, their team is knowledgeable, and they understand the urgency of industrial needs. With every order, we receive timely updates, fast delivery, and 100% genuine products. It’s rare to find such consistency and reliability in this field.
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We've tested multiple suppliers over the years, but IndustriaX Limited consistently stands out. Their product catalog is extensive, their team is knowledgeable, and they understand the urgency of industrial needs. With every order, we receive timely updates, fast delivery, and 100% genuine products. It’s rare to find such consistency and reliability in this field.
- Michael Anderson