GE PACSystems RX7i - Serial Port Pin Assignments

Chapter 5. Communications
GFK-2222AD April 2018 191
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, RX3i CRU,
and RX7i CPE Models
RX3i CPE310 Model
Pin No.
78
Signal Name
Description
Pin No.
78
Signal Name
Description
1
NC
No Connection
1
DCD
Data Carrier Detect
2
TXD
Transmit Data
2
TXD
Transmit Data
3
RXD
Receive Data
3
RXD
Receive Data
4
DSR
Data Set Ready
4
DSR
Data Set Ready
5
0V
Signal Ground
5
COM
Signal Ground
6
DTR
Data Terminal Ready
6
DTR
Data Terminal Ready
7
CTS
Clear to Send
7
CTS
Clear to Send
8
RTS
Request to Send
8
RTS
Request to Send
9
NC
No Connection
9
RI
Ring Indicator
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
Clear to Send
2
TXD
Transmit Data
3
0V
Signal Ground
4
0V
Signal Ground
5
RXD
Received Data
6
RTS
Request to Send
78
Pin 1 is at the bottom right of the connector as viewed from the front of the module.