CB Series PC104 Plus User’s Manual
Pin Assignments
DB25(M) Connectors
1
14
13
25
The CBL-F40M25x4-50 and CBL-F20M25x4-50 cables provide DB25 (M) connectors for each
serial port, with pin assignments as follows:
Pin RS-232
RS-422
4-wire RS-485 2-wire RS-485
2 TxD
RxD+(B)
Data+(B)
3 RxD
TxD+(B)
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4 RTS
---
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5 CTS
---
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6 DSR
---
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7 GND
GND
GND
8 DCD
TxD-(A)
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20 DTR
RxD-(A)
Data-(A)
5-3