Rockwell Automation 1769-SM2 Compact I/O DSI/Modbus Communication Module - Manual (Page 34)

2-12 Installing the Module
The 1769-SM2 module is intended to be mounted to a well-grounded
mounting surface such as a metal panel. Additional grounding
connections from the module’s mounting tabs or DIN rail (if used) are
not required unless the mounting surface cannot be grounded. Refer to
Industrial Automation Wiring and Grounding Guidelines, publication
1770-4.1, for additional information.
Shielded Connector Grounding Requirements
When using the 22-RJ45CBL-20 cable, which has shielded connectors,
the shields are all grounded to the chassis terminal block on the
1769-SM2 module (item 11 in
Figure 1.1 ). However, the user must:
•
Install a wire from the chassis terminal block on the 1769-SM2
module to a grounded, conductive surface (i.e. metal panel). See
Figure 2.6 .
•
Remove the shield connection to chassis ground at the drive I/O
block shield terminal.
Figure 2.6 Shielded Connector Grounding Details
Grounding the Module
Drive Drive I/O Block
PowerFlex 4 Terminal 16
PowerFlex 4M Terminal 16
PowerFlex 40 Terminal 19
PowerFlex 40P Terminal 19
PowerFlex 400 Terminal 20
DSI / Modbus RTU
MODULE
CH1 CH2 CH3
C
H
1
C
H
2
C
H
3
To Drive 1
To Drive 2
To Drive 3