LME75.831A2PKG Siemens Flame Safeguard

Overview

The Siemens LME75.831A2PKG is a high-performance, microprocessor-based burner control and flame safeguard package designed for the supervision of forced draft burners of medium to large capacity. This comprehensive package includes the LME75.000A2 base unit, a PME75.831A2 program module, and a complete connector plug kit. Engineered for continuous operation, it provides sophisticated commissioning and monitoring for 1-stage, 2-stage, or modulating burners. Its digital signal handling ensures an accurate control sequence, while the integrated interface allows for easy parameterization and diagnostics, making it a critical safety component for industrial thermoprocessing and commercial combustion systems.

Features

• Digital signal handling for high-precision control sequences and repeatable performance
• Integrated valve proving function to ensure safety and integrity of the gas train
• Multi-color LED and 3 x 7-segment display for clear operational status and fault messaging
• SIL 3 capable, meeting high safety integrity levels for industrial applications
• Undervoltage detection and electrical remote lockout reset facility for enhanced reliability
• Built-in BC interface for connection to PC or AZL2 display units
• Programmable actuator modulation supporting PWM, analog, or 3-position step control
• Proof of Closure (POC) input for monitoring valve positions during startup and operation

Specifications

• Model: LME75.831A2PKG
• Supply Voltage: AC 220 V (50/60 Hz)
• Base Unit: LME75.000A2
• Program Module: PME75.831A2
• Enclosure Rating: Designed for integration in burner systems or control cabinets
• Operating Temperature: -20 C to +60 C
• Service Life: Designed for 250,000 burner startup cycles (approx. 10 years)
• Approvals: CE, UL, FM, CSA, and SIL 3 certified
• Inputs: Analog inputs for load controllers (DC 0…10 V, 0/4…20 mA, 0…135 Ohm)

Applications

• Supervision of 1-stage or 2-stage forced draft oil and gas burners
• Modulating burners with pneumatic or mechanical fuel-air ratio control
• Continuous operation burner systems in industrial thermoprocessing equipment
• Integration with forced draft burners for liquid or gaseous fuels in accordance with EN 267 and EN 676
• HVAC and commercial boiler systems requiring high-reliability flame safeguard controls
• Compatible with self-checking UV scanners (QRA7), infrared detectors (QRI), or ionization probes for flame monitoring