Product Details
Configured for automatic burner sequencing and intermittent pilot flame safety control in 7800 Series platforms, the Honeywell RM7895A1014 (RM7895A Primary Burner Control) provides direct physical execution of safety interlocks and valve actuation. The microprocessor-based relay module processes flame detector signals, enforces selectable safety interlocks, and coordinates timing sequences across a 120 VAC 50/60 Hz line supply. It manages a 4-second or 10-second pilot flame establishing period alongside an intermittent main flame sequence, automatically cutting off fuel supply paths upon flame failure detection.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | RM7895A1014 |
| Brand | Honeywell |
| Origin | USA |
| Weight | 1.25 kg (2.75 lbs) |
| Dimensions | 127 mm x 127 mm x 133 mm |
| Operating Temp | -40 to +60 deg C |
| Power Consumption | 120 VAC (+10/-15%), 50/60 Hz, 10 W max |
| Module Type | Flame Safety Burner Control Relay Module |
| Pilot Type | Intermittent |
| Pilot Flame Establishing Period | 4 sec or 10 sec (selectable) |
| Safety Interlocks | Selectable interlock inputs |
| System Platform | Honeywell 7800 Series |
4-20 mA HART Loop Protocol & Channel-to-Channel Isolation
The RM7895A1014 integrates high-voltage isolation barriers between internal microcomputer logic and external line-voltage terminal outputs driving gas valves, ignition transformers, and alarm circuits. While nearby process instrumentation channels transmit data over 4-20 mA HART loop protocol connections in shared control enclosures, the RM7895A1014 uses internal high-frequency noise suppression to prevent ignition transformer switching transients from coupling onto surrounding low-voltage analog signal lines or degrading channel-to-channel isolation on adjacent loop interfaces.
Frequently Asked Questions
Q: Is live insertion or hot-swapping supported for the RM7895A1014 module?
A: No, all line voltage must be completely isolated from the wiring subbase prior to inserting or removing the relay module to prevent connector arcing and internal logic damage.
Q: How is the pilot flame establishing period configured on this module?
A: The pilot flame establishing period is set to either 4 seconds or 10 seconds via internal hardware jumper configurations prior to mounting the card onto its terminal subbase.
Field Installation Guidelines
- De-energize all power feeds to the Q7800 subbase before mounting or replacing the RM7895A1014 relay module.
- Align the rear connector block with the Q7800 subbase guide slots and press the module straight in until the side retention latches click into place.
- Keep high-energy ignition leads isolated from low-voltage flame sensor cabling, routing them in grounded flexible steel conduits to limit electromagnetic interference.
- Ensure the subbase frame ground connection maintains low-impedance earth continuity to allow stable flame current signal sensing.
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
The Shift to Flexible IO Modules in Modern Industrial Automation
Traditional control systems rely on dedicated Input Output (IO) cards for industrial automation. Each conventional module processes a single signal type, such as Digital Input (DI), Digital Output (DO), Analog Input (AI), or Analog Output (AO). A standard 16-channel card accepts only one specific channel type across all ports. This inflexible hardware design often creates severe engineering bottlenecks during project execution. Engineers frequently must install entirely new cards to accommodate a single extra sensor. Consequently, late design changes increase control cabinet space requirements and drive up project costs.
DCS Commissioning Steps in Industrial Automation Projects
Commissioning a Distributed Control System (DCS) represents a crucial milestone when deploying modern process automation infrastructure. Field engineers must execute systematic verification steps to transition complex control hardware from static installation to dynamic plant control. Proper commissioning ensures that controllers, I/O modules, network switches, and HMI software operate in strict compliance with engineering design specifications before introducing live process fluids.
PLC and DCS Control System Spares Strategy: Engineering Guidelines
Modern factory automation relies on high-speed fiber optic backbones to link distributed control systems across noise-intensive industrial environments. Unlike copper wiring, optical fibers transmit data via light pulses, making them completely immune to electromagnetic interference (EMI). Field engineers must master optical cable joining and fusion splicing techniques to guarantee low-loss data transmission across critical Programmable Logic Controller (PLC) and Distributed Control System (DCS) nodes.