Rockwell Automation 440C Guardmaster 440C-CR30 Configurable Safety Relay User Manual - Manual (Page 21)

Rockwell Automation Publication 440C-UM001C-EN-P - November 2014 21
Power, Ground, and Wiring Chapter 3
Grounding the Configurable
Safety Relay
This product is intended to be mounted to a grounded mounting surface such as
a metal panel. See the
Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1 , for more information.
Connecting a Power Supply Power for the relay is provided by an external 24V DC power supply source.
To comply with the CE Low Voltage Directive (LVD), the 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, 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.
The following Rockwell Automation power supplies are SELV- and PELV-
compliant, and they meet the isolation and output hold-off time requirements of
the CR30 relay:
• 2080-PS120-240VAC
• 1606-XLP30E
• 1606-XLP50E
• 1606-XLP50EZ
• 1606-XLP72E
• 1606-XLP95E
• 1606-XLDNET4
• 1606-XLSDNET4
Figure 5 - Power Supply
WARNING: All devices that are connected to the RS-232 communication port
must be referenced to controller ground, or be floating (not referenced to a
potential other than ground). Failure to follow this procedure can result in
property damage or personal injury.
+DC
24V
COM
0V
Input Terminal Block
Input/Output Terminal Block
09 10 11
12 A2 A1 13 14 15 16 17 18 19 20 21
+24V DC
24V Common
00 01 02 03 04 05 06 07 08