LC700 – User’s Guide
3.44
PS-DC-R - DC POWER SUPPLY MODULE
Part Number
PS-DC-R (Power Supply Module - 20 to 30 Vdc – Redundant)
Description
This redundant power supply works independently or with another redundant power supply module
to assure a constant power supply to the application. When two Redundant Power Supply modules
are used, both split the energy that is needed to supply to the system. When one power supply fails,
the other, automatically, will assume the operation. Each power supply has a relay to indicate
failures allowing the user to replace damage modules.
This module has two voltage outputs:
a) 5 Vdc @ 3A distributed by Power Lines in the Inter-Module-Bus (IMB) through Racks to supply
module circuits;
b) 24 Vdc @ 300mA for external use through terminals 1B and 2B.
The AC applied voltage and the 5Vdc and 24 Vdc are isolated.
There are three ways to use this module:
Single Module (only one module is used): Less than 3 A are required.
There is an address restriction related to the location of the Power Supply. This restriction is the first
Rack (Address 0) must have a Power Supply Module in the first slot. The CH1 jumper must be in the
position E.
More Than One Module: More than 3 A are required.
They must be placed in the first slot of the rack. Jumper W1 on the rack that has the new Power
Supply must be cut. Every new Power Supply will only supply energy to the Rack in which it is
located and, with the jumper cut off, it will not supply energy to the previous Racks. All modules
must have the jumper CH1 placed in the E position.
Redundant Mode:
In redundant mode, the power supply modules must be located in the first and third slots of the rack.
In both, the jumper CH1 must be in the position R. In this condition, the power supply modules will
split the power. This topology is called “split power mode”.
Figure 3.20- DC Power Supply
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