BCU - Siemens Electronic Type_J C TET Boiler Control

IBC

● 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 Stage” and “Fault Code” achievable from BCU

● Burner fault description translated from the BCU “Fault Code” when 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