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Vanguard Multiport 4520CP Controller User’s Guide A-11
Synchronous Serial Cables
FIGURE 14. Signals Transmitted through the DB-25 Connector Pins for RS-
422 and 485
TxD
B
TxCin
A
RxD
B
RxCin
A
TxCout
A
14
15
16
17
18
19
20
21
22
23
24
25
DTR
GND (Shield)
TxD
A
RxD
A
RTS
CTS
DSR
GND Signal
CD
RxCin
B
TxCout
B
TxCin
B
1
2
3
4
5
6
7
8
9
10
11
12
13