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Installation
1
Remove the fuse(s) in the equipment bay fuse panel for the circuit(s) where the HRM-238 shelf battery
wire(s) will terminate.
2
Connect one end of the frame ground wire to Terminal 4 (FGND) on TB1 of the HRM-238 shelf and attach
the other end of the frame ground wire to the CO ground wire termination point.
3
Connect the -48 Vdc CO battery to the HRM-238 shelf
a
Connect a wire to the HRM-238 shelf TB1 Terminal 1 (-48V_A) for Primary CO battery.
b
Connect a wire to the HRM-238 shelf TB1 Terminal 2 (-48V_B) for Redundant CO battery.
c
Connect the battery common wire to HRM-238 shelf TB1 Terminal 3 (BATTERY RETURN) of the
HRM-238 shelf and attach the other end to CO battery ground source(s).
d
Connect the wire(s) from the HRM-238 TB1 Terminal 1 and Terminal 2 to the CO -48 Vdc power
termination point(s).
I
C
NSTALLING
OMMUNICATION
All wiring and connections for the HRM-238 shelf are on the back.
and connectors. Connect the NMA wiring from the HRM-238 shelf to each HiGain or Megabit Modem line unit
that will be managed using the steps beginning on
or Interconnect Shelves" on page 9
appropriate for your application.
6
Table 2. Terminal Block (TB1)
Terminal
1
2
3
4
Terminal 2
to -48 Vdc
Terminal 3 to battery
Terminal 1
common (Battery Return)
to -48 Vdc
Figure 7. Connect -48 Vdc and Frame Grounds to TB1
W
IRING
page
and
"Connect to a Computer, Terminal, or Modem" on page 9
July 21, 2004
Description
-48V_A
-48V_B
BATTERY RETURN
FGND
(Figure
7):
Terminal 4 to
frame ground (FGND)
H0547-B
Figure 5 on page 4
7. Then, use the other connectors in
LTPH-UM-1237-04
shows the shelf backplane
"Connect to a LAN
that are
HRM-238 List 1
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