Specifications

Reference Guide 2-9
System Installation Installing the System Power Cards
Also be sure to set the same jumper on the system resource cards and external alarm cards to
agree with the above setting for the chassis. Refer to the associated chapters in this guide for
more information on those card jumpers.
2.3 Installing the System Power Cards
Next, install power supplies, AC-to-DC power converters, and ringing generators into the
system chassis, as described in this section. However, do not apply power to the system until
you finish installing these cards, AND after making the power and ground connections to the
chassis as described in the next section of this chapter.
CAUTION!
Failure to follow the procedures mentioned above will result in damaging the
boards.
2.3.1 Talk Battery Supply Fuses
The fuse for the DC Power Supply is in a removable cartridge next to the DC input socket on
the front or rear panel (depending on which chassis you may have). The power supply should
have a 5amp fuse on it. Refer to the system specifications section in this manual.
2.3.2 AC Power Supply and DC Supply Fuses
The AC power supply and DC Power Supply Fuses already built in. When unpacking the unit
a power cord will be in the box. The AC inlet connector is located in the front or rear of the
chassis. Refer to the system specification section in this manual.
2.3.3 Installing AC or DC Power Supplies
To install the AC or DC power supply in a chassis, first remove the panel covering the front
power slot. Then, hold the power supply by its metal handle and align the printed circuit board
(PCB) edges with the rail guides of either power supply slot. Push the unit in until it is firmly
seated in the backplane connector, and replace the panel cover. For redundant power supplies,
also insert a second AC or DC power supply into the adjacent slot.
You may remove or install
power supplies with power applied.