LME75.231A2PKG Siemens Flame Safeguard

Overview

The Siemens LME75.231A2PKG is a comprehensive flame safeguard package designed for the supervision and control of forced draft burners of medium to large capacity. This specific kit includes the LME75.000A2 basic burner control unit, the PME75.231A2 program module, and a compatible plug kit. It is engineered for continuous operation and utilizes a microprocessor-based system to ensure high-precision digital signal handling. This safeguard is a critical safety component for industrial thermal process applications, providing reliable commissioning and flame monitoring for 1-stage or 2-stage burners, as well as those with pneumatic or mechanical ratio control modulation.

Features

• Microprocessor-based burner control for high accuracy and repeatable control sequences
• Designed for continuous operation, allowing for permanent flame supervision without the need for periodic shutdowns
• Self-check scanner capability when used with compatible flame detectors
• Integrated BC interface for connection to an AZL2 display unit or OCI460 cloud gateway
• Multicolor LED signal lamp provides clear indication of operational status and fault messages
• Includes undervoltage detection and an electrical remote lockout reset facility
• Comprehensive safety interlocks wired independently for specific fault indication
• SIL3 capable classification according to DIN EN 13611, making it suitable for high-safety-level industrial applications

Specifications

• Model: LME75.231A2PKG
• Base Unit: LME75.000A2
• Program Module: PME75.231A2
• Operating Voltage: AC 230 V (50/60 Hz)
• Power Consumption: Approximately 3 VA
• Protection Rating: IP40 (when mounted)
• Operating Temperature: -20 C to +60 C
• Design Lifetime: 250,000 burner startup cycles (approx. 10 years)
• Weight: Approximately 5.0 lbs (package weight)
• Flame Detection: Compatible with Ionization probes and self-checking UV scanners (e.g., QRA7, QRI)

Applications

• Supervision of 1-stage or 2-stage forced draft burners for gaseous or liquid fuels
• Industrial thermoprocessing equipment in accordance with EN 746-2
• Forced draft burners with pneumatic/mechanical fuel-air ratio control modulation
• Continuous or high-demand burner operations in commercial and industrial boiler systems
• Suitable for use in safety-related systems requiring SIL2 or SIL3 integrity levels