Schroder IES258K

Technical Specifications

• Supply voltage: 230 V AC, 50/60 Hz
• Ignition output voltage: Matches mains voltage
• Flame detection method: Ionization electrode type
• Safety time on start-up: 5 seconds
• Safety time during operation: 1 second
• Power consumption: Approximately 9 VA
• Protection rating: IP54
• Operating temperature range: -20°C to +60°C
• Maximum sensor cable length: 75 m for ionization control
• Maximum ignition cable length: 5 m

Functional Features

• Fully automatic ignition sequence control and flame supervision
• Selectable fault response: immediate lockout or automatic restart after flame failure
• Integrated status display shows program status and flame signal intensity
• Built-in self-diagnostic function with fault indication
• Compatible with both single-stage and two-stage burner control
• Compact design supports DIN rail mounting or direct wall installation

Application Scenarios

• Industrial gas burner control systems
• Boiler and furnace combustion control
• Oven, kiln and drying equipment heating systems
• Thermal processing equipment in metalworking industry
• Incinerator and waste heat treatment systems

Working Principle

When the controller receives an operation command, it initiates the ignition sequence: it opens the gas solenoid valve and outputs a high-voltage ignition pulse to the ignition electrode. After successful ignition, the ionization electrode detects the micro-current generated by the flame to confirm combustion status. During normal operation, the controller continuously monitors the flame signal. If flame loss is detected, it immediately cuts off the gas supply and triggers an alarm or restart sequence according to the configured mode. The built-in safety logic ensures reliable gas shutoff under fault conditions to prevent safety hazards.

Installation Requirements

• Install in a location protected from direct heat radiation and vibration
• Use shielded cables for flame detection and ignition circuits
• Keep ignition cables as short as possible (maximum 5 meters)
• Ensure reliable grounding of the burner and controller
• Mount vertically with the cable glands facing downward

Material & Structure

• Flame-retardant plastic housing with IP54 dust and water protection
• Internal integrated ignition transformer, flame detection circuit and logic control unit
• Front panel with status indicators and mode selection switch
• Screw terminal connectors for power, sensor and actuator connections

Usage Notes

• Verify gas type and pressure match burner specifications before commissioning
• Regularly inspect and clean the ionization electrode to maintain detection reliability
• Do not bypass or disable safety protection functions
• Disconnect power before performing maintenance on the burner system
• Periodically test safety functions to ensure proper operation