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BCU - Siemens Electronic Type

For burner fitted with Siemens electronic Burner Control Unit (BCU)

The PLC is connected to the BCU via RS485 interface for communication

On-line burner Operating Stageand Fault Codeachievable from BCU

Burner fault description translated from the BCU Fault Codewhen activated

Siemens

Burner Control Unit (BCU)

LMV52

LMV51

LMV2

LMV3

LME39…

LME7…

PLC / BCU interface

RS485 / RS232

RS485 / RS232

RS485 / OCI412

RS485 / OCI412

Communication protocol

MOD Bus

MOD Bus

MOD Bus / BCI

BCI

Current fuel type for dual fuel burner

Dry contacts

Dry contacts

Dry contacts

Dry contacts

Burner off / restart and firing control

BCU Internal

BCU Internal

via MOD Bus

Dry contacts

On Screen Display

BCU “Operating Stage” number

Burner operation graphical imitation

Air damper actuator position

Current fuel actuator position

-

Flame trimming actuator position

-

-

FGR damper actuator position

-

-

Air fan motor speed via VSD/VFD

-

-

Air temperature

Flue gas temperature

Flue gas O2 content

Combustion efficiency

Burner output (%)

-

-

BCU internal burner start counter

Flame intensity signal (%)

Burner fault code with description

standard

separate transmitter required; - not available