Dte connector - eia rs-232-c, Telco connector, Interface pin assignments – Telenetics MOT202TSA User Manual
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Interface Pin Assignments
Page
29
Interface Pin Assignments
DTE Connector - EIA RS-232-C
Pin
RS-232C Circuit
CCITT V.24 Circuit
Function
1
AA
101
Protective Ground
2
BA
103
Transmitter Data
3
BB
104
Receive Data
4
CA
105
Request to Send
5
CB
106
Clear to Send
6
CC
107
Data Set Ready
7
AB
102
Signal Ground
8
CF
109
Data Carrier Detect
9
+12 Volts Test Only
10
-12 Volts Test Only
25
Analog Loopback
Note:
All interfaces on the RS-232-C digital connector conform to
the requirements of EIA-RS-232-C.
Telco Connector
Pin
Description
4, 5
2-wire mode: transmit/receive pair.
4-wire mode: transmit pair.
3, 6
Receive pair for 4-wire mode.
Polarity of transmit pair or receive pair is not significant. Remaining
pins are not used.