LME71.111A1PKG-PRG23 Siemens Flame Safeguard

Overview

The Siemens LME71.111A1PKG-PRG23 is a comprehensive, microprocessor-based flame safeguard control package designed for the supervision of 1- or 2-stage gas forced draft burners. This specific package includes the LME71.000A1 basic unit, a PME71.111A1 programming module, and a complete AGG3.710 connector plug set. As a critical safety device, it manages burner startup and continuous operation, ensuring that safety shutoff valves are energized only when a flame is present. The LME7 series is engineered for medium to high-capacity burners and features digital signal handling for high-precision control sequences and intermittent operation, requiring a controlled shutdown at least once every 24 hours.

Features

• Comprehensive safety supervision for burner startup and continuous operation
• Integrated 3 x 7-segment display for program sequence, service, and error status information
• Multicolor LED signal lamp providing visual feedback on operating status and faults
• Programmable purge and Proof of Closure (POC) input for enhanced safety monitoring
• Digital signal processing ensures accurate and repeatable timing for all control phases
• Electrical remote lockout reset facility for convenient system management
• BC interface allowing for connection to an AZL2 display unit or PC via OCI410/417 interface
• Air pressure supervision with a functional check of the air pressure switch during startup

Specifications

• Model: LME71.111A1PKG-PRG23
• Supply Voltage: AC 120 V (+10% / -15%)
• Frequency: 50/60 Hz
• Power Consumption: Approximately 12 VA
• Flame Detection: Ionization probe or UV flame detector (QRA2, QRA4, or QRA10)
• Safety Response Time: 1 second or 3 seconds (parameter adjustable)
• Operating Temperature: -20 C to +60 C
• Protection Rating: IP40 (when mounted)
• Approvals: UL, FM, CSA, CE

Applications

• Management of 1-stage or 2-stage gas forced draft burners in commercial and industrial settings
• Supervision of direct or pilot ignited burners in HVAC and boiler systems
• Suitable for use in gas-fired equipment complying with EN 676 standards
• Integration into industrial thermal process plants following EN 746 part 2 guidelines
• Ideal for medium to large capacity atmospheric gas burners requiring intermittent operation supervision