Specifications

2-16 Reference Guide
Model No.
Running Head
System Power and Ground Connections System Installation
Figure 2-10. Front-Loading Chassis with Power Supplies on the Side
2.5.3 Front-Loading Chassis with Power Supplies on Top
Figure 2-11 shows the power connector block on the front-loading chassis with power supplies
on top.. Although the power block is oriented vertically on this chassis, it provides the same
connections as the power blocks on the other chassis models.
Note:
If -48 VDC is applied to V
A
or V
B
, DO NOT connect external power to V
N
.
R
G
R
+
+
+
-
-
-
V
N
V
A
V
B
C
O
M
O
ptional Telecom Ground
A
C* third wire* ground
-
48VDC Return
-
48 VDC Supply
AC PLUG
48 VDC PSU
(Note: on Optional Telecom Ground Connection:
It may be required when the 48VDC PSU output is
not grounded or when the system is AC powered. It
is only needed for the proper operation of the
Telecom Ground Start and E&M signaling circuits.
For Additional information please refer to Field Alert
Bulletin 108-000001).
POWER CONNECTIONS
-
+