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P C / 1 0 4 M o d u l e
3
4
5
6
7
8
9
RS-422
Pin
1
2
3
4
5
6
7
8
9
RS-485
Pin
1
2
3
Chapter 2 Quick Installation Guide
RXD2
RTS2
TXD2
CTS2
DTR2
RI2
GND
Pin Name
TX-
N.C
RX+
N.C
TX+
N.C
RX-
+5V/+12V
GND
Pin Name
B (Data-)
N.C
N.C
2-26
P F M - C V S R e v . B
IN
OUT
OUT
IN
OUT
IN
GND
Signal Type
OUT
IN
OUT
IN
PWR
GND
Signal Type
I/O
±9V
±9V
±9V
Signal Level
±5V
±5V
+5V/+12V
Signal Level
±5V
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