PLCs, Power Supplies & Others

This flame safety relay monitors burner flame presence for industrial combustion systems. It provides automatic shutdown during flame loss or internal faults. Therefore, this component suits boilers, furnaces, and kilns.

Physical Dimensions and Weight Specifications

The Honeywell RM7890B1014 features a rugged housing for panel mounting. Its width measures 105 mm for standard cutout dimensions. The total depth reaches 130 mm including the rear terminals. Consequently, technicians can install this relay in burner control cabinets.

Interface Types and Connection Layout

The Honeywell RM7890B1014 provides screw-clamp terminals for all field wiring. A separate 15-pin socket carries flame sensor and control signals. The front panel carries LED indicators for flame status and alarm conditions. Hence, operators can verify burner safety at a quick glance.

Component Count and Safety Architecture

This flame safety relay contains one main board with dual microprocessors. The board holds self-checking circuitry for critical safety functions. You will also find two redundant flame detection channels for reliability. An onboard watchdog timer shuts down the system during internal faults.

Energy Storage and Power Requirements

The Honeywell RM7890B1014 draws 18 VA from the AC supply. An internal supercapacitor stores fault history for 14 days without power. This storage retains last fault codes during maintenance shutdowns. Therefore, technicians can diagnose past issues after power restoration.

Safety Functions and Certification

The relay includes a manual reset function for lockout conditions. It performs a self-test sequence at every startup. Users can program purge timing and ignition trials via the front panel. This relay meets NFPA, EN, and FM safety standards for burner management.

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