Rockwell Automation 1771-A2BSS_A3B1SS Install Instruc Universal I/O Chassis - Manual (Page 9)

Universal I/O Chassis 9
Publication 1771–5.60 – May 1999
Use the installation manual for your programmable controller or
adapter module to set the switches.
!
ATTENTION: If you do not properly configure the
backplane switch assembly, various system failures
may occur.
10807–I
I/O chassis
backplane switch assembly
OFF ON
12
3
4
5
6
7
8
Your I/O chassis can receive power through:
•
processors with integral power supplies that provide 2-4A
•
power-supply modules that provide 3-8A
•
external power supplies that provide 6.5-16A
(external power supplies are not designed for parallel operation)
Power-supply modules are designed for parallel operation. See your
power supply installation documentation for possible configurations.
Important: The 1772-LSP, -LWP, -LXP, and -LZP processor
modules already contain a power supply so you can
only parallel one additional power-supply module with
these processor modules.
!
ATTENTION: Do not connect an external power
supply and a power-supply module to the same I/O
chassis; they are incompatible.
If your I/O chassis is receiving power through Then
an external power supply or a power supply chassis continue with this section
power-supply modules go to page 10
Attaching a Power Supply to an I/O Chassis
The I/O chassis has two power connectors. You connect the external
power supply or power supply chassis (1771-PSC) to the I/O chassis
using these connectors and the appropriate power supply cables.
Set the Switches on the
Backplane Assembly
Provide Power
to the I/O Chassis