Honeywell 600U Ultra Flame Rod Signal Processor

HTS IFM – 600U Ultra Flame Rod Signal Processor

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Overview

The Honeywell 600U Ultra Flame Rod Signal Processor is a rectification-based flame detection device designed to confirm the presence of a flame by measuring rectified current flow through a flame rod. When the rectified current exceeds a preset threshold, the flame relay is energized, providing a reliable flame signal output for burner management and safety interlock systems.

The 600U features a six-LED bar graph for real-time visual flame signal indication, fault LEDs for rod-fouled and rod-grounded conditions, and selectable high/low gain for flexible installation. It is compatible with ignition coils and ignition transformers, allowing the flame rod to also serve as the ignition rod in supported configurations.

Features & Benefits

Flame detection via rectified current flow through a flame rod — energizes flame relay when signal exceeds preset threshold
Six-segment LED bar graph (1–6) provides visual indication of flame signal strength and relay status
Four selectable gain levels via jumper plug — allows sensitivity adjustment for varying flame rod applications
Compatible with ignition coil or ignition transformer — flame rod doubles as ignition rod when used with ignition coil
Flame rod fouled, grounded, and fault LED indicators — supports rapid field diagnosis without additional test equipment
Three ignition modes supported: flame rod only, flame rod with ignition coil, and flame rod with ignition transformer
35 mm DIN rail mounting — simplifies panel installation and wiring
Dual-voltage input (85–132 VAC or 170–264 VAC, 50/60 Hz) — suitable for North American and international applications

Technical Specifications

Input Power: 85–132 VAC or 170–264 VAC, 50/60 Hz
Input Current (Monitoring Only): 0.07 A at 115 VAC; 0.035 A at 230 VAC
Input Current (Ignition On): 0.3 A at 115 VAC; 0.15 A at 230 VAC + ignition transformer current (max 5 A)
Flame Rod Voltage: 175 VAC
Flame Rod Current: < 0.5 mA (no flame)
Flame Relay Output: DPDT contacts, rated 5 A at 125/277 VAC and 30 VDC
Ignition Transformer Relay: DPST contacts, rated 5 A at 125/250 VAC
Ignition Command Input: 12–50 VDC or 85–264 VAC
Ignition Coil Drive: 4.4 μF capacitor discharged at line frequency via 4 A, 400 V SCR
Signal Display: 6-digit LED bar graph (1–6) for flame signal strength
Sensitivity Levels: 4 selectable gain levels via jumper
Detection Method: Flame rod sensing via rectified current flow
Mounting: 35 mm DIN rail
Ambient Temperature Range: 0 to 60°C (32 to 140°F)

Applications

Industrial burner management systems requiring flame rod-based flame detection
Direct spark ignition (DSI) systems using a shared flame rod and ignition rod
Ignition transformer-based ignition systems with integrated flame supervision
Industrial combustion equipment requiring DIN rail-mounted flame signal processing
Flame supervision in boilers, ovens, dryers, and process heating equipment