LME75.812A1PKG-PRG1 Siemens Flame Safeguard

Overview

The Siemens LME75.812A1PKG-PRG1 is a microprocessor-based flame safeguard and burner control unit designed for the supervision of 1-stage or modulating forced draft burners. This high-performance controller ensures safe commissioning and continuous operation of gas or oil burners in medium to large capacity industrial and commercial plants. The package includes the LME75.000A1 burner control unit along with the PME75.812A1 program module and a matching connector plug kit, providing a comprehensive solution for sophisticated combustion systems.

Features

• Microprocessor-controlled digital signal handling for accurate control sequences
• Integrated 3-color LED for clear indication of operational and fault status messages
• Self-checking capability for continuous operation exceeding 24 hours of uninterrupted use
• Built-in display interface for connecting AZL2 units to view flame signal strength and status
• Independent ignition position for modulating actuator control
• Integrated valve proving function and undervoltage detection for enhanced safety
• Electrical remote lockout reset facility
• SIL3 classification according to DIN EN 13611 for high safety integrity in industrial applications

Specifications

• Model: LME75.812A1PKG-PRG1
• Supply Voltage: AC 120 V (50/60 Hz)
• Power Consumption: Approx. 3 VA
• Degree of Protection: IP40 (when mounted)
• Operating Temperature: -20 C to +60 C
• Safety Level: Up to SIL3 (Safety Integrity Level 3)
• Analog Inputs: DC 0 to 10 V, DC 0/4 to 20 mA, or 0 to 135 Ohm for load controllers
• Design Lifetime: 250,000 burner startup cycles (approx. 10 years)
• Weight: Approximately 5 lbs

Applications

• Supervision of 1-stage or modulating forced draft burners in continuous operation
• Industrial thermoprocessing equipment in accordance with EN 746-2
• Gas-fired equipment and forced draft burners as per EN 676
• HVAC systems requiring sophisticated air-fuel ratio control and safety monitoring
• Suitable for use with self-checking UV scanners, infrared scanners, or flame rods
• Control of mechanical or pneumatic ratio control modulation for high-demand burner cycles