Allen-Bradley 1734-OB8S User Manual

Rockwell Automation Publication 1734-UM013N-EN-P - September 2017 49
Guidelines for Placing Power Supplies and Modules in a System Chapter 3
Power Supply Examples
Use these valid power-supply example configurations to help you understand
various combinations of power supplies that can fit your system:
• Example 1:
Isolating Field Power Segments on page 49
• Example 2: POINT Guard I/O Used with AC I/O Modules on page 50
These examples are for illustrative purposes only, to help you understand various
power sourcing concepts.
Example 1: Isolating Field Power Segments
This power supply example uses a 1734-EP24DC expansion power supply and
1734-FPD field power distributor to illustrate mixing standard POINT I/O and
safety POINT Guard I/O modules. The example illustrates the mixing standard
while creating separate groups for input and output modules, along with digital
and analog modules.
IMPORTANT
• You must define the requirements for segmenting field and bus power in
your application.
• POINT Guard I/O does not require separate field-bus power usage, that is,
separate power supplies for the 1734-IB8S, 1734-OB8S, 1734-OBV2S, or
1734-IE4S modules. This step is optional.
• POINT Guard I/O does not require separate POINTBus (communication)
power-supply usage, which separates it from any other POINT I/O
modules, except when additional POINTBus power is required.
• Do not apply AC voltage to POINT Guard I/O modules.
Standard I/O
Standard I/O
Standard I/O
Standard I/O
Standard I/O
Standard I/O
Standard I/O
Standard I/O
Standard I/O
Standard I/O
Standard I/O
Standard I/O
1734-EP24DC 1734-FPD 1734-FPD 1734-EP24DC
1734-AENT
EtherNet/IP Adapter
1734-IB8S 1734-IB8S 1734-OBV2S 1734-OB8S
1734-IE4S 1734-IE4S
5V and 24V Supply for
Additional I/O
Modules (option)
5V5V 5V
Group 2 Group 3 Group 4 Group 5Group 1
24V
1734-IB8S
24V Supply for
Safety Outputs
24V Supply for
Safety
Analog Inputs
5V Supply for All Safety
Modules and 24V Supply
for Safety Inputs
5V and 24V Supply for
Standard I/O
Modules
24V24V 24V 24V

Allen-Bradley 1734-OB8S Specifications

General

Brand	Allen-Bradley
Model	1734-OB8S
Category	Control Unit
Language	English