Hardware reference guide

Pwr. & Grnding. Guide
35013379 02 October 2007 777
DC Powered
Systems
The following figure shows the DC powered systems.
Note: This power and grounding configuration is compliant with the CE standards
for the 140CPS11420 and 140CPS12420 power supplies, and for the
140CPS11100 (PV 01 or greater) power supply.
FUSE
+24 VDC
24 V COM*
FUSE
24 V COM*
24 V
+
−
EARTH GROUND
*It is recommended that the 24 V
power be earth grounded.
PANEL
GROUND
POINT
EQUIPMENT
(CHASSIS)
GROUND
GND
GND
GROUND
SCREWS
FUSE
+24 VDC
24 V COM*
GND
PS C
P
U
I/O
or
C
C
P
U
PS
O
M
M
I/O
or
C
O
M
M
I/O
or
C
O
M
M
I/O
or
C
O
M
M
I/O
or
C
O
M
M
I/O
or
C
O
M
M
I/O
or
C
O
M
M
PS
RED/
BACKPLANES
+24 VDC
RED/
SUM
SUM
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com