Allen-Bradley 1769-PA2 - Schematic (Using ANSI;CSA Symbols); Connect the Power Supplies

Rockwell Automation Publication 1769-IN028C-EN-P - August 2016 19
Compact I/O Expansion Power Supplies
Schematic (Using ANSI/CSA Symbols)
Connect the Power Supplies
Compact I/O system architecture and the power supply design support connection of I/O on
either side of the power supply. Each I/O bank requires its own power supply.
To connect 2 I/O banks, attach a 1769 expansion I/O cable to a power supply or I/O module as
shown in the Power Supply Connection
illustration on page 20. Up to 8 I/O modules can be
connected on either side (A or B in the illustration) of the power supply for a maximum of 16
modules per bank.
Each 1769 I/O module has a power supply distance rating, with a maximum value of eight. See
the specific installation instructions for the specific 1769 I/O module for more information.
L1 L2
Disconnect
Isolation
Transformer
X1
X2
Fuse
Operation of either of these contacts
removes power from the external I/O
circuits, which stops machine motion.
Emergency-Stop Push
Button
Overtravel Limit
Switch
Stop
Start
Fuse
MCR
230V AC
I/O
Circuits
Master Control Relay (MCR)
Cat. No. 700-PK400A1
Suppressor
Cat. No. 700-N24
MCR
Suppr
MCR
MCR
115V AC or
230V AC
DC Power Supply
-
+
24V DC I/O
Circuits
MCR
(Lo)
(Hi)
230V AC
Line Terminals: Connect to the 24V DC 1769
power supply terminals.
Line Terminals: Connect to the AC 1769
power supply terminals.
115V AC
or 230V
AC
Use NEC Class 2 for
UL Listing