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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
functions, names, and signal directions.
The cable pinout is illustrated in the
Diagram.
Table 2 - CGCM-DLR Unit Interconnection Cable
Pin
Name
Description
1
Not used
2
XMIT
Transmit
3
RCV
Receive
4
DTR
Data terminal ready
5
GND
Ground
6
DSR
Data-set ready
7, 8, 9
Not used
Figure 26 - CGCM-DLR Unit Interconnection Cable Diagram
To CGCM Unit
DB-9 Female
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
Installation
table for connector pin numbers,
CGCM-DLR Unit Interconnection Cable
Function
Sends serial data from CGCM-DLR unit
Receives serial data from CGCM-DLR unit
Receives a signal that the sending unit is operational
Provides the ground signal
Sends a signal that the CGCM-DLR unit is operational
To CGCM Unit
DB-9 Female
Chapter 2
37
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