Chapter 2 Hardware Configuration
Page: 2-6
PMB-901LF USER
′
S MANUAL
2-4. COM PORT & CONNECTOR
COM1:
COM1 Port, fixed as RS-232
The pin assignments are as follows:
PIN ASSIGNMENT
PIN ASSIGNMENT
1
COM1_DCD#
6
COM1_DSR#
2
COM1_RX
7
COM1_RTS#
3
COM1_TX
8
COM1_CTS#
4
COM1_DTR#
9
COM1_RI#
5
GND
COM2:
COM2 Connector, selectable as RS-232/422/485
The pin assignments are as follows:
ASSIGNMENT
PIN
RS-232
RS-422
RS-485
1
COM2_DCD#
TX-
485-
2
COM2_RX
TX+
485+
3
COM2_TX
RX+
X
4
COM2_DTR#
RX-
X
5
GND
GND
GND
6
COM2_DSR#
X
X
7
COM2_RTS#
X
X
8
COM2_CTS#
X
X
9
COM2_RI#
X
X
10
NC
NC
NC
5
1
9
6
COM1
1
6
5
10
COM2
