JHCTech BRAV-7501, Руководство пользователя

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User’s Manual
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3 GP72 4 GP73
5 GND 6 GP74
7 GP75 8 GP76
9 GP77
(All of the above DIOs are TTL signals, digital inputs (high level 1: 2-5.25V, low level 0: 0-0.8V), digital
output (high level 1: minimum 2.4V, low level 0: Maximum 0.4V).)
2.3.6 COM Connector
The BRAV-7501 provides 2 serial ports of COM1/2 by 2*D-sub 9-pin connectors. COM1/2 can be
configured as RS232
、
RS422 or RS485 by BIOS setup. Table 2.7 for pin assignments.
Figure 2. 12
Table 2.7: COM1/2 Serial Ports Pin Assignments
Pin RS-232 Signal RS-422 Signal RS-485 Signal
1 DCD TX- DATA-
2 RxD TX+ DATA+
3 TxD RX+ NC
4 DTR RX- NC
5 GND GND GND
6 DSR NC NC
7 RTS NC NC
8 CTS NC NC
9 RI NC NC