Allen-Bradley 1734-IB8S - Example 1: POINT Guard I;O Used with 1734-EP24 DC for Input, 1734-FPD for Output - 24 V DC Only I;O

Rockwell Automation Publication 1734-UM013C-EN-P - August 2010 61
Power Supply Examples Chapter 5
Example 1: POINT Guard I/O Used with 1734-EP24DC for Input,
1734-FPD for Output - 24V DC Only I/O
This power supply example uses a 1734-EP24DC expansion power supply and
1734-FPD field power distributor to power I/O with these properties:
• Group 1 and Group 4 I/O have separate functioning groups of I/O,
compared to the rest of the I/O.
• Field power for Group 3 is on a supply separate from bus communication
power (Supply 3 loss is visible to the controller).
• Field power for Group 2 is on the same supply as bus communication
power for Group 2 and Group 3 (Supply 2 loss causes broken connections
to the controller for Group 2 and Group 3).
1734-AENT
5V
24V
Standard I/O
Standard I/O
Standard I/O
Standard I/O Standard I/O
1734-EP24DC 1734-EP24DC 1734-FPD
1734-OB8S
1734-IB8S 1734-IB8S 1734-OB8S
24V Supply for
Standard I/O
Modules
24V Supply for
Additional I/O
Modules (option)
24V Supply for
Safety Outputs
24V Supply for
Safety Inputs
5V
5V
24V
24V
24V
Standard I/O Standard I/O Standard I/O Standard I/O Standard I/O Standard I/O
Group 1 Group 2 Group 3 Group 4
Standard I/O
1734-IB8S
Supply 1 Supply 2 Supply 3 Supply 4