Honeywell Q7055A Installation Instructions Manual page 43

Figure 7-2 shows how to configure a Null Modem
Cable DB9F.
RxD
TxD
DTR
DCD
DSR
GND
RTS
CTS
Figure 7-2: Signal connections for DB9F Null Modem Cable
EN1B-0198GE51 R1004B
BUILDING NETWORK ADAPTER BNA-1C/2CS/2DN
2
3
4
1
6
5
7
8
RI
9
RxD
2
TxD
3
DSR
6
DCD
1
DTR
4
GND
5
RTS
7
CTS
8
RI
9
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