Rockwell Automation 1752-L24BBBE SmartGuard 600 Controllers User Manual - Manual (Page 30)

30 Rockwell Automation Publication 1752-UM001E-EN-P - June 2014
Chapter 2 Installing and Wiring the SmartGuard 600 Controller
Grounding the SmartGuard
Controller
You must provide an acceptable grounding path for each device in your
application. Functionally ground the controller through its V0/G0 power
connection.
In addition, if you are using the 1752-L24BBBE controller, you should connect
the Ethernet ground terminal to an acceptable ground.
Figure 4 - Ethernet Ground
Refer to the Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1, for additional information.
Connecting a Power Supply Power for the controller is provided via an external 24V dc power source. The
output hold time must be 20 ms or longer.
To comply with the CE Low Voltage Directive (LVD), DeviceNet connections
and I/O must be powered by a dc source compliant with Safety Extra Low
Voltage (SELV) or Protected Extra Low Voltage (PELV).
To comply with UL restrictions, DeviceNet connections and I/O must be
powered by dc sources whose secondary circuits are isolated from the primary
circuit by double insulation or reinforced insulation. The dc power supply must
satisfy the requirements for Class 2 circuits or limited voltage/current circuits
defined in UL 508.
ATTENTION: This product is grounded through the DIN rail to chassis ground.
Use zinc plated yellow-chromate steel DIN rail to assure proper grounding. The
use of other DIN rail materials (for example, aluminum or plastic) that can
corrode, oxidize, or are poor conductors, can result in improper or intermittent
grounding. Secure DIN rail to mounting surface approximately every 200 mm
(7.8 in.) and use end anchors appropriately.