User`s guide

Jumpers and Connectors • 25

Pin header on RTM

PIN SIGNAL FUNCTION

P1 RDCDJ1 Data Carrier Detect

P2 RDSRJ1 Data Set Ready

P3 RRXD1 Receive Data

P4 RRTSJ1 Request to Send

P5 RTXD1 Transmit Data

P6 RCTSJ1 Clear to Send

P7 RDTRJ1 Data Terminal Ready

P8 RRIJ1 Ring Indicate

P9 GND Ground

P10 NC No Connect

Table 15: COM1 Pin Header on RTM

2.3.6 COM2 Serial Ports on RTM (RS-232/422/485/485+)

COM2 serial port on the cPCI-R6765 can be configured as RS232, RS422,

RS485 or RS485+ by setting the appropriate jumpers, refer to section 2.2.4.

Pin # RS-232 RS-422 RS-485

1 DCD, Data carrier detect TX- DATA-

2 RXD, Receive data TX+ DATA+

3 TXD, Transmit data RX+ NC

4 DTR, Data terminal ready RX- NC

5 GND, ground GND GND

6 DSR, Data set ready NC NC

7 RTS, Request to send NC NC

8 CTS, Clear to send NC NC

9 RI, Ring indicator NC NC

Table 16: COM2 Serial Port Pin Assignment