Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
37
Installation
Chapter
2
Communication Connectors and Settings
There are three ports on the unit: the factory calibration port, the redundancy
port (COM1), and the EtherNet/IP® network port.
Factory Calibration Port
The factory calibration port is not intended for use by anyone other than
qualified factory representatives.
Redundancy Port (COM1)
The DB-9 female connector on the bottom side of the CGCM-DLR unit is used
for communication with another CGCM-DLR unit when operating in a
redundant system configuration. Use a null modem cable for this connection.
See CGCM-DLR Unit Interconnection Cable
table for connector pin numbers,
functions, names, and signal directions.
The cable pinout is illustrated in the
CGCM-DLR Unit Interconnection Cable
Figure 26 - CGCM-DLR Unit Interconnection Cable Diagram
Table 2 - CGCM-DLR Unit Interconnection Cable
Pin
Name
Description
Function
1
Not used
2
XMIT
Transmit
Sends serial data from CGCM-DLR unit
3
RCV
Receive
Receives serial data from CGCM-DLR unit
4
DTR
Data terminal ready
Receives a signal that the sending unit is operational
5
GND
Ground
Provides the ground signal
6
DSR
Data-set ready
Sends a signal that the CGCM-DLR unit is operational
7, 8, 9
Not used
To CGCM Unit
DB-9 Female
To CGCM Unit
DB-9 Female