LME71.111A1PKG-PRG0 Siemens Flame Safeguard

Overview

The Siemens LME71.111A1PKG-PRG0 is a preprogrammed, microprocessor-based flame safeguard control package designed for the startup and supervision of 1- or 2-stage gas forced draft burners. This specific package includes the LME71.000A1 base unit, a PME71.111A1 program module, and a connector plug set. It serves as a critical safety component in industrial thermal process applications, energizing safety shutoff valves while monitoring the flame via ionization probe or UV sensors to prevent hazardous conditions during intermittent operation.

Features

• Preprogrammed with factory settings for standard “Basic with Purge” applications
• Integrated 3-color LED signal lamp for status and error messages
• Built-in 3 x 7-segment display for program sequence, service, and error information
• Electrical remote lockout reset facility
• Air pressure supervision with functional checks of the air pressure switch during startup and operation
• Proof of Closure (POC) input to ensure gas valves are fully closed before startup
• Accurate digital signal handling for precise control sequences
• Undervoltage detection and restart limitation for enhanced safety

Specifications

• Model: LME71.111A1PKG-PRG0
• Operating Voltage: AC 120 V (50/60 Hz)
• Power Consumption: Approximately 12 VA
• Safety Class: I
• Protection Rating: IP40 (when mounted)
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 1.2 lbs (0.54 kg)
• Flame Detection: Ionization probe, QRA2, QRA4, or QRA10 UV detectors
• Approvals: UL, FM, CSA, and CE

Applications

• Supervision of 1-stage or 2-stage gas forced draft burners
• Atmospheric gas burners in intermittent operation
• Industrial thermal process applications and boiler systems
• Commercial HVAC systems requiring controlled air damper or fan speed management
• Replacement or integration into complex gas train assemblies requiring programmable purge cycles