Serial Port Pin Assignments - GE PACSystems RX7i Reference Manual

5.2.3 Serial Port Pin Assignments

COM1 (RS-232, 9-pin Subminiature D Connector)
This port has a 9-pin, female, D-sub connector with a standard pin out. This is a DCE (data
communications equipment) port that allows a simple straight-through cable to connect with a standard
AT-style RS-232 port.
The CPE310 provides the DCD and RI signals to support point-to-point protocol (PPP).
COM1 RS-232 Signals
RX3i CPU,
and RX7i CPE Models
78
Pin No. Signal Name Description
1 NC
2 TXD
3 RXD
4 DSR
5 0V
6 DTR
7 CTS
8 RTS
9 NC
COM1 (RS-232, RJ-25 Connector)
The CPE302/CPE305 provides RS-232 communications via an RJ-25 connector and requires shielded
cable IC693CBL316.
CPE302/CPE305 COM1 RS-232 Signals
Pin No. Signal Name Description
1 CTS
2 TXD
3 0V
4 0V
5 RXD
6 RTS
78
Pin 1 is at the bottom right of the connector as viewed from the front of the module.
GFK-2222AD
RX3i CRU,
No Connection
Transmit Data
Receive Data
Data Set Ready
Signal Ground
Data Terminal Ready
Clear to Send
Request to Send
No Connection
Clear to Send
Transmit Data
Signal Ground
Signal Ground
Received Data
Request to Send
April 2018
RX3i CPE310 Model
78
Pin No. Signal Name Description
1 DCD
2 TXD
3 RXD
4 DSR
5 COM
6 DTR
7 CTS
8 RTS
9 RI
Chapter 5. Communications
Data Carrier Detect
Transmit Data
Receive Data
Data Set Ready
Signal Ground
Data Terminal Ready
Clear to Send
Request to Send
Ring Indicator
191