Function Of Terminal 66; Function Of Terminal 67; Function Of Terminal 68 - Honeywell Krom Schroder BCU 580 Technical Information

Parameters

10 .10 .4 Function of terminal 66

Parameter 71
Parameter 71 = 0: Off.
Parameter 71 = 8: AND with input at terminal 46 (emer-
gency stop).
Parameter 71 = 20: LDS ignition position check.
The BCU does not perform a burner start-up, restart or
start-up attempt until the butterfly valve is in ignition
position. To ensure that the burners only start with the
start-up fuel rate, the FCU issues an enable signal to
start the burner via terminal 66 to the BCU with setting
P71 = 20. In addition, the safety interlocks must have
been enabled by the FCU.
FCU
µC
53 53 54 55 54 55
M M
BCU 580 · Edition 11.15l
L1 L1 +24V
66 66
BCU BCU

10 .10 .5 Function of terminal 67

Parameter 72
Parameter 72 = 0: Off.
Parameter 72 = 8: AND with input at terminal 46 (emer-
gency stop).

10 .10 .6 Function of terminal 68

Parameter 73
Parameter 73 = 0: Off.
Parameter 73 = 8: AND with input at terminal 46 (emer-
gency stop).
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