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14 en | Installation ATM/POS Bridge
F.01U.171.816 | 1.0 | 2010.09 Installation Manual Bosch Security Systems, Inc.
4.3 COM Connector Detail
The four COM connectors on the bridge are all 9-pin SubD-type
male connectors.
Figure 4.2 COM connector detail
Note: The console cable has pin 9 connected to pin 5 (GND).
When pin 9 of COM 3 (console) is at GND level on power-up,
the bridge enters firmware download mode.
Pin COM 1
RS232
COM 2
RS232
COM 3
(console)
RS232
COM 4
RS485
1
2RxRxRxD2+
3TxTxTxD2-
4
5GND GND GND GND
6
7RxC RxC
8 TxC TxC
9INIT
15
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