Specifications

3-20
Reference Guide
Model No.
Running Head
System Power and Ground Connections System Installation
Figure 3-12. D/C Terminal Block on Enhanced Chassis
with Power Supplies on Top in a D/C Environment with one Power Source
Note:
The diagram above only depicts one DC power source which would support the F1
power supply. If a redundant power configuration is desired, then a second power
source would be applied to the V
B
(+ & -) leads. A separate feed is not required to the
V
NB
(+ & -) leads unless a redundant feed is preferred.
Note:
See “Power Enhanced Chassis with Power Supplies in Front (891930)” on page 19.
for information on proper connections when using “Telecom Signaling Ground.”
CAUTION: For continued protection
against fire, replace fuses only
with the same type and rating.
Fuse 8A
Time Delay
RGR
COM
V
NA
+
-
V
NB
+
-
V
A
+
-
V
B
+
-
-
+
-48 VDC Supply
-48 VDC Return
48 VDC Source
Protective Earth/Chassis Ground
Terminal Block