Product Details
Configured for burner management and safety sequencing in single burner combustion systems, the Honeywell RM7890B1014/U (RM7890B1014/U Burner Control Relay) provides direct physical/electrical execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | RM7890B1014/U |
| Brand | Honeywell |
| Origin | Standard Industrial Manufacturing |
| Weight | 0.8 kg |
| Dimensions | Standard 7800 Series plug-in module profile |
| Operating Temp | -40 deg C to +60 deg C (-40 deg F to +140 deg F) |
| Power Consumption | Max 10 W |
| Input Voltage | 120 VAC (+10%, -15%), 50/60 Hz |
| Output Contacts | 2 SPDT relays |
| Flame Establishing Period | Selectable 4 or 10 seconds (intermittent pilot) |
Channel-To-Channel Isolation And Loop Protocol Integrity
The module integrates specialized flame amplifier inputs compatible with R7847, R7848, R7849, R7851, R7861, and R7886 sensors, maintaining strict electrical isolation between high-voltage combustion interlocks and low-voltage system logic. It supports data communication bus modules and PC interface protocols while providing galvanic separation to protect burner management networks from electromagnetic interference and ground potential shifts. Cold junction compensation (CJC) and internal nonvolatile memory safeguard sequence tracking and fault history retention during transient power losses.
Frequently Asked Questions
Q: Can the RM7890B1014/U burner control relay be hot-swapped while the burner management panel is energized?
A: No. Main electrical power and 120 VAC supply lines must be completely isolated and locked out prior to removing or inserting the module on its Q7800 subbase to prevent internal component damage or accidental ignition staging.
Q: How is the flame establishing period configured on this module?
A: The flame establishing period is selectable for either 4 seconds or 10 seconds via internal hardware jumper settings or configuration tools prior to final system commissioning.
Field Installation Guidelines
- Ensure all primary 120 VAC power feeds and burner interlock circuits are locked out and tagged out before handling the unit.
- Mount the module securely onto a compatible Q7800A or Q7800B universal wiring subbase, ensuring all plug-in pin connectors seat fully without binding.
- Verify correct wiring of input power terminals and ensure flame detector signal leads maintain proper shielding against high-voltage ignition interference.
- Test system sequencing, pilot flame establishing intervals, and safety shut-off valve response via manual burner startup checks before returning the equipment to operational service.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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Mastering Time Synchronization in Industrial Automation Applications
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