ControlLogix Redundant Power Supply 15
Publication 1756-IN573C-EN-P - October 2003
Connect Solid State Relay
A solid state relay on your redundant power supplies can be connected to an input
module. This connection monitors whether the supplies are functioning properly.
When using the solid state relay, you must wire a source voltage that is compatible
with the input module to either contact terminal and then connect the other
terminal to the input point.
The relays are closed during standard operation. The solid state relay contacts open
in any of the following conditions:
• If one or both of the supplies fail. In this case, the contact open on the failed
supply (ies), and the input module alerts you to the failure through the
controller program.
• The connected redundant power supplies are turned OFF.
Use Figure 14 to wire the solid state relay on your redundant power supply.
Figure 14
The annunciator cable must not exceed 10 meters (32.8 feet). For recommendations
on how to route the wiring in your redundant power supply application, see
page 17.
ATTENTION
The annunciator output is rated for resistive loads. It should
not be used to drive the coil of an electromagnetic relay.
42663
Connection to input module
Source voltage
Screws
Make sure you tighten the
screws on either side of the
plug to make sure it is
completely mated to the
power supply through the
life of the product.
Allen-Bradley HMIs
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