Rockwell Automation Publication 842E-UM002A-EN-P - November 2013 23
Installation Chapter 3
Electrical
Electrical Wiring Instructions
Three electrical connections are located on the back of the housing.
A 4-pin M12 connector is used for the 24V DC power supply connection.
Two 4-pin M12 connectors are used for the Ethernet connection. The Link
1 connection is used for star networks. For ring networks, use both the
Link 1 and Link 2 connectors. In a linear network, use Link 1, Link 2, or
both connectors.
Also refer to publication 1770-4.1
, Industrial Automation Wiring and
Grounding Guidelines, available online at http://
www.rockwellautomation.com/literature/, for additional installation
requirements.
ATTENTION: Switch off the power supply. The machine/system could
unintentionally start while you are connecting the devices.
Ensure that the entire machine/system is disconnected during the electrical
installation.
ATTENTION: Commissioning requires a thorough check by authorized
personnel!
Before you operate a system equipped with the 842E-CM encoder, make sure
that the system is first checked and released by authorized personnel.
Please read more in Chapter 1, Safety Precautions, page 11.
For best results, grounding the encoder flange is recommended.
Net
Mod
Link 1
Link 2
XS
Network
Address
Switches
x1
x10
x100
Power connection
Link 2 connection
Link 1 connection
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