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November 18, 2005
T
U
S
URNING
P THE
Perform the following procedures prior to installing the management unit(s) into the shelf.
Insert Fuse
Insert an appropriately sized fuse(s) into the equipment bay fuse panel for the circuit(s) where the HRM-238 shelf
battery wire(s) were terminated. Refer to the appropriate management unit user manual for power consumption,
power dissipation, and current drain.
Verify Cabling
Verify the following:
Step
1
Verify a minimum of -42 Vdc and a maximum of -56 Vdc between the following:
a. -48 Vdc battery screw Terminal 1 and the battery common Terminal 3 (BATTERY RETURN)
b. -48 Vdc battery screw Terminal 2 (when used) and the battery common Terminal 4 (BATTERY
RETURN)
2
Visually verify that all connections are securely terminated.
Secure Cabling
Tie the cable connectors to the back of the HRM-238 shelf using the tie wraps and mounting screws.
I
R
NSTALLING OR
EPLACING
This section provides instructions for installing or replacing the HMU-319 in a HRM-238 List 2 shelf.
Electronic modules can be damaged by electrostatic discharge (ESD). Before handling modules,
IMPORTANT
wear an antistatic discharge wrist strap to prevent damage to electronic components. Place
!
modules in antistatic packing material when transporting or storing. When working on modules,
always place them on an approved antistatic mat that is electrically grounded.
Installing or Replacing the HMU-319 Management Cards
This section provides instructions for installing or replacing an HMU-319 management card.
Step
1
To remove an existing management card, grasp the card's handle and slide the management card out of
card slot.
2
To install the new management card, align the edges of the management card with the card guides in
appropriate slot, then slide the card into the slot.
• Slot A - HMU-319 that will manage the "A Side" shelf/line cards
• Slot B - HMU-319 that will manage the "B Side" shelf/line cards
3
Carefully press the management card into the slot until the connector on the rear of the card properly
seats in the connector on the backplane.
4
Refer to the
HiGain Management Unit (HMU) 319 User Manual
LTPH-UM-1315-01
YSTEM
HRM-238 S
Action
C
HELF
OMPONENTS
Action
(LTPH-UM-1142) for turnup instructions.
Chapter 2: Installation
2-11
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