QPC513 Enhanced Serial Data Interface card Page 859 of 906
Circuit Card Description and Installation
Connector pin assignments
Table 268 shows the pin assignments for J1 and J2 when the port is configured for RS-232-C interface, and Table2 69 on page 860 shows the pin assignments for J1 and J2 when the port is configured for the high-speed interface.
Table 268
Connector J1 and J2 pin assignments – RS-232-C interface (Part1 of 2)
Pin number Signal functions
Signal source
EIA
circuit
To DCE From DCE
Ground and
common return
1Shielded n/a n/a
7Signal ground (SG) n/a n/a AB
Data
2Transmitted data (TX) 3—BA
3Received data (RX) —3BB
Control
4Request to send (RTS) 3—CA
5Clear to send (CTS) —3CB
6Data set ready (DSR) —3CC
8Carrier detect (CD) —3CF
20 Data terminal ready (DTR) 3—CD
Timing
15 Transmitter signal element timing (DCE) —3DB
Note: Pins not used are 9 to 14, 16, 18, 19, 21, 22, 25.