Rockwell Automation 1756-xxxx ControlLogix Chassis and Power Supplies Installation Instructions - Manual (Page 51)

Rockwell Automation Publication 1756-IN005C-EN-P - March 2014 51
Install Chassis and Redundant Power Supplies Chapter 2
The relays are closed during standard operation. The solid-state relay contacts
open if either of these events occur:
• One or both of the supplies fail.
In this case, the contact opens on the failed supply (or supplies), and the
input module alerts you to the failure through the controller program.
• The connected redundant power supplies are turned OFF.
When you use the solid state relay annunciator function, connect a compatible
source voltage to either contact terminal. Then connect the other terminal to the
monitoring or signaling device.
Connect the solid-state relay as shown in Figure 36 .
Figure 36 - Solid-state Relay Connection
ATTENTION: Annunciator cable length is less than 10 m (32.8 ft).
The annunciator output is rated for resistive loads. Do not use it to drive the coil of
an electromagnetic relay.
The redundant power supply and the annunciator
cable that use different input power sources. Redundant power supply and the annunciator cable
that use the same input power source.
The annunciator wiring must be tucked under the tab at the top of
the plastic barrier and routed separately from the power wires.
1
3
2
5
4
1
4
2
3
Configuration 1 Configuration 2
45841
45842
Item Description
1 Source voltage
2 Annunciator cable to input module
3 0.25…2.5 mm² (22…14 AWG) solid or stranded-copper wire rated at 90 °C (194 °F), or
greater, 1.2 mm (3/64 in.) insulation max
4 0.25…2.5 mm² (22…14 AWG) solid or stranded-copper wire rated at 90 °C (194 °F), or
greater, 1.2 mm (3/64 in.) insulation max
5 Plastic barrier