12 in stock
Honeywell RM7898A1018 Relay Module
Honeywell RM7898A1018 Relay Module
Brand/Manufacturer: Honeywell
Order Number: RM7898A1018
Type: Relay Module
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 RM7898A1018, also cataloged as the RM7898A1018 Burner Control Unit, operates as a dedicated hardware component for safety sequence execution and valve proving within 7800 SERIES burner control systems. It mounts to a standard wiring subbase to directly manage sequence timing, pre-ignition interlocks, dynamic self-check flame detection, and automated safety valve closure testing across commercial and industrial combustion platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | RM7898A1018 |
| Brand | Honeywell |
| Origin | USA / Mexico |
| Weight | 3.00 lbs (1.36 kg) |
| Dimensions | 127 mm x 127 mm x 133 mm (with Q7800A subbase) |
| Operating Temp | -40 deg C to +60 deg C |
| Power Consumption | 10 W nominal |
| Supply Voltage | 120 VAC (+10%, -15%), 50/60 Hz |
| Pilot Flame Establishing Period | Selectable 4 s or 10 s |
| Integrated Features | Valve Proving System (VPS), Early Spark Termination |
Process Control and DCS Interface Features
The module provides isolated digital outputs to drive dynamic self-checking ultraviolet flame detectors and safety shutoff valves via integrated hardwired relays. Internal microprocessors manage channel-to-channel isolation between low-voltage sensor inputs and line-voltage output circuits. Communication with supervisory DCS and PLC architectures is executed via an optional S7800 display module connected to the ControlBus header, ensuring system status, sequence timing, and specific fault code data are transmitted without loading the safety interlock safety loops.
Frequently Asked Questions
Q: What is the primary function of the Integrated Valve Proving System (VPS) on the RM7898A1018?
A: The VPS automatically tests the tight closure of safety shutoff valves prior to ignition or post-purge phases, triggering a safety lockout if valve leakage is detected.
Q: Can the RM7898A1018 relay module be operated without plug-in accessory cards?
A: No, the RM7898A1018 requires a plug-in flame signal amplifier, a purge timer card, and a compatible Q7800 wiring subbase to complete the functional hardware assembly.
Field Installation Guidelines
- Disconnect all line-voltage power supplies prior to installing or removing the module from the Q7800 subbase.
- Verify subbase terminal wiring aligns with the 120 VAC input and load ratings before energizing the safety loop.
- Ensure the module card-edge connector aligns straight with the subbase receptacle, applying firm hand pressure until retaining screws engage.
- Separate high-voltage ignition leads from low-voltage signal, flame detector, and communication wiring by at least 150 mm to suppress high-frequency electromagnetic interference.
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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
Reliable Partner for Original Parts
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
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
Trusted Source for Industrial Automation Spares
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
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