Specifications

Copyright © AMETEK
9
9.1 Description
The FOCUS Power Supply Module is part of the
FOCUS chassis common equipment. It comes in
four variations, depending on the voltage of the
power source. The four variations are:
• 24Vdc
• 48/60Vdc
•110/125Vdc/Vac
• 220/250Vdc/Vac
Each variation of the module comes with the
following regulated voltage supplies:
• +8 volts
• -8 volts
• +18 volts
•-18 volts
•-30 volts
The module is designed such that a failure of one
of these regulated voltages illuminates the major
or minor alarm LED on the front edge of the
module, depending on which one fails. (See the
section titled “Status Indicators” later in this
chapter for a description of the module’s status
LEDs.) The failure also registers an alarm in the
FOCUS Configuration Software (FCS).
The power supply interface is a screw-type
terminal block with 10 connections, or screws and
a separate ground screw. We recommend using a
stranded copper wire, braided preferred, for
connection to ground.
Each FOCUS Power Supply Module is fully
redundant and non-load sharing. The module’s
specifications are shown in Table 9-1.
9.2 Application
The Power Supply Module energizes the FOCUS
chassis. You can have either a single Power
Supply Module or two: one for the main power
supply and one for standby, or backup. If you have
both a main and a standby Power Supply Module,
they can have different source voltages (e.g., main
= 250Vdc; standby = 48Vdc).
9.3 Installation
A FOCUS chassis is typically shipped with the
Power Supply Module(s) already installed, along
with the other common equipment and the
specified channel modules. We recommend that
you set up the entire chassis in a test setting,
attach any necessary wiring or cables, and test its
functionality before installing it in an operating
network. Likewise, if you are adding a new or
replacement Power Supply Module to your
system, we also recommend you first install and
test it in a test chassis.
If your Power Supply Module(s) came already
installed in the chassis, you can skip Step 2 below,
which tells you to insert the module into the
chassis. If your Power Supply Module(s) came
separately, complete all steps.
The FOCUS chassis provides two slots for power
supply modules. These are labeled PWR-MAIN
and PWR-STBY on the front of the chassis.
9.3.1 Hardware Installation and
Connections
To install the FOCUS Power Supply Module(s)
and connect the proper wiring, complete the
following steps:
1. Connect the proper wiring to the Power
Supply Module interface(s).
If you have a single Power Supply Module,
connect the wiring from the ac or dc power
source to screws 1 and 2 on the terminal block
on the rear interface (see Figure 9-1). You
must also connect the ground screw to an
electrical ground via a dedicated wire, prefer-
9. Power Supply Module