52 Rockwell Automation Publication 1791ES-UM001G-EN-P - November 2016
Chapter 3 Install the Module
must also mount the module to an earth-grounded, conductive surface with
conductive mounting hardware.
If you do not want to ground the Ethernet shields at the module, remove the
‘shorting’ bar and conductive screw/washer combination and mount the
module to wall or panel.
Functional Earth Ground for EMC
The mounting screw at the bottom of the module is required to be a
conductive screw for EMC compliance. Mount the module to an earth-
grounded, conductive surface by using conductive mounting hardware to make
the required connection with earth ground.
Make Connections for 1791ES
Modules
Follow these guidelines when wiring the module:
• For stranded wire, install an insulation-covered ferrule (DIN 46228-4
standard compatible-type) at the ends before you connect wires.
• Torque screws for the power connector to 0.56…0.79 N•m (5…7 lb•in).
• Torque screws for the I/O connectors to 0.5…0.56 N•m (4.5…5 lb•in).
See the Ethernet Design Considerations Reference Manual, publication
ENET-RM002
, for information about Ethernet cable.
Power Connections
See Table 7 for a description of the pins in the power connector.
Table 7 - Power Connector Pin Descriptions
TIP If the Ethernet shields are not grounded at the module, the mounting screw
at the Ethernet end of the module is not required to make a connection with
earth ground.
Pin No. Signal
1 Input +24V DC power
2 Input power common
3 Output +24V DC power
(1)
(1) NC on catalog number 1791ES-IB16 modules.
4 Output power common
(1)
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