Honeywell BCU 460 Technical Information page 57

Fieldbus communication
BCU input information (BCU ➔ PLC)
This module transfers the signal states of the digital inputs on the BCU to the PLC.
Input terminals
Bit Byte n
0
Terminal 1
1 Terminal 2
2 Terminal 3
3 Terminal 4
4 Terminal 5
5 Terminal 6
6 Terminal 7
7 Terminal 35
BCU output information (BCU ➔ PLC)
This module transfers the signal states of the digital outputs on the BCU (via output terminals and bus) to the PLC.
Bit Byte n Byte n+1
0 Terminal 60 Terminals 80/81/82
1 Terminal 61 Terminals 85/86/87
2 Terminal 62 Terminals 90/91/92
3
Terminal 63 Terminals 95/96
4 Terminal 64 Terminals 95/97
5 Terminal 65 Terminal 51
6 Terminal 66 Free
7
Terminal 67 Free
1) Only with BCU 465 depending on the parameter settings.
BCU 460, BCU 465 · Edition 11.19
K-SafetyLink
Byte n+1 Byte n+2
Terminal 36 Safety interlocks (limits)
Terminal 37 LDS
Terminal 38 High temperature
Terminal 39 Purge
Terminal 40 Free
Terminal 41 Free
Free Free
Free Free
Byte n+2
Ready
Purge ON
Operating signal
Free
Free
Free
Free
Free
Transfer via
Byte n+3
Reset
Burner 1 start
Air
Purge
Burner 2 start
Flameless operation
Open control element
Close control element
Byte n+3
Burner 1 operating
signal
Burner 2 operating
signal
BCU system fault
Fault lock-out
Safety shut-down
Warning
BCU ON
Manual mode
NFS bus
Byte n+4
Auxiliary gas
Optional output
Cooling air valve
Free
Free
Free
Free
Free
Byte n+4 Byte n+5
Control element to Flameless mode
max. position ON 1)
Control element to
Free
closed position
Air ON Free
Purge ON Free
HT ON Free
Ready Free
Burner 1 flame Free
Burner 2 flame Free
Format
BOOL
BOOL
BOOL
BOOL
BOOL
BOOL
BOOL
BOOL
Format
BOOL
BOOL
BOOL
BOOL
BOOL
BOOL
BOOL
BOOL
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