Zhone IMACS 8000, User Manual

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2-14 Reference Guide
Model No.
Running Head
System Power and Ground Connections System Installation
The Table 2-2 describes the function of all the terminals on the DC Terminal Block.
The figures Figure 2-8 to Figure 2-12 show some examples of how to wire/strap the DC
Terminal Block for various common powering configurations.
Figure 2-8.DC Powered System - Single DC Power Supply in Slot F1 - No Voice Cards
Table 2-2. Terminals on DC Terminal Block
DC Terminal Block
Connection
Function
RGR Connect external Ring Generator to this terminal only if 8000-RG cards are not
provided in the 8000 chassis and ringing voltage is required (e.g. using FXS
cards in the chassis).
VNA (+ and -) Connect 48 VDC power feed to these terminals to:
(a) Power 8000-RG (ringing generator) in slots R1 and R2.
(b) Provide network power for cards needing -48 V such as; talk battery for
voice cards (FXS and FXO), signal battery to E&M cards, and sealing current
to OCUDP and ISDN cards.
VNB (+ and -) Connect 48 VDC power feed to these terminals to:
(a) Power redundant 8000-RG (ringing generator) in slot R1 and R2.
(b) Provide redundant network power for cards needing -48 V such as; talk
battery for voice cards (FXS and FXO), signal battery to E&M cards, and
sealing current to OCUDP and ISDN cards.
VA (+ and -) Power connection for primary DC Power Supply in slot F1
VB (+ and -) Power connection for redundant DC Power Supply in slot F2
COM Common ground for all data cards
Terminal for building/chassis ground connection. This terminal is common
with the ground lug on the side of the chassis.
R G R
C OM
V
NA
+
-
V
NB
+
-
V
A
+
-
V
B
+
-
T erminal
B lock
-
+
-48 VDC S upply
-48 V D C R eturn
P rotective E arth/C hassis G round