Product Overview
The RM7890A1031 is a microprocessor-based integrated primary burner control. This relay module manages single burner applications for gas, oil, or combination fuels . It delivers automatic burner sequencing and comprehensive flame supervision. The control provides system status indication and self-diagnostics for efficient troubleshooting .
Key Specifications
| Parameter | Specification |
|---|---|
| Model | RM7890A1031 |
| Type | On-Off Primary Burner Control |
| Input Voltage | 120 Vac (+10%, -15%) |
| Frequency | 50/60 Hz |
| Pilot Flame Establishing Period | 30 seconds fixed |
| Main Flame Establishing Period | Intermittent |
| Dimensions (W x H x D) | 127 x 127 x 133 mm (with Q7800A subbase) |
| Weight | 0.8 kg (1 lb 13 oz) |
| Operating Temperature | -40°C to +60°C |
| Vibration Limit | 0.5G environment |
| Power Dissipation | 10W maximum |
| Max Connected Load | 2000 VA |
Hardware & Connectivity
This relay module requires a Q7800A or Q7800B subbase and a compatible flame amplifier . Interchangeable plug-in amplifiers include R7847, R7848, R7849, R7851, R7852, R7861, or R7886 models . Five LEDs provide clear sequence and status information at a glance . The module uses a 34-pin connector for subbase interface.
Memory & Safety Features
Nonvolatile memory retains history files and sequencing status after power loss . This module is SIL 3 capable in a properly designed safety instrumented system . The RM7890A1031 has a fixed 30-second pilot flame establishing period . Selectable relight or lockout on flame loss gives users operational flexibility .
Certifications & Compliance
This control carries approvals from UL, FM, Swiss Re, and meets FCC Class B emissions standards . It also complies with CSA certification requirements . The unit operates reliably from -40°C to +60°C across demanding industrial environments. Proper earth grounding is essential, requiring a low impedance connection .
Details
| Weight | 0.2 kg |
|---|---|
| Dimensions | 85 × 65 × 30 mm |
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