LC700 – User’s Guide
3.40
PS-AC-R - AC Power Supply Module
Part Number:
PS-AC-R (Power Supply 90 to 264 Vac Redundant)
Description
This redundant power supply works independently or with another redundant power supplies
module to assure a constant energy supply to the application. When two redundant power supply
modules are used, only one of them will supply energy to the system while the other stays in stand-
by as a backup. When there’s a failure the backup power supply will assume the operation. Each
redundant power supply module has a relay to indicate failures allowing the user to replace
damaged 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:
There are two modes of redundancy:
- Splitting Power concept: In this case of redundancy, the user may have two Power Supplies
modules in parallel (first and third slots) the “CH1” jumper must be set in “R” position for both
modules and “W1” must be opened for both modules. In this situation, the two powers will be
splitting power to the bus.
- Stand By concept: In this case, the main module must be located in the first slot and the back-up
module in the third slot. In both modules, the jumper “CH1” must be placed in the position “R” and
“W1” must be placed ONLY in the back-up module.
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