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Rockwell Automation Publication 1734-UM013C-EN-P - August 2010
Chapter 5
Power Supply Examples
Example 2: POINT Guard I/O Used with 1734-EP24DC for Input and
Output, Plus AC I/O
This power supply example uses a 1734-EP24DC input and output with these
properties:
•
Group 1 and Group 3 I/O have separate functioning groups of I/O,
compared to Group 2.
•
Field power for Group 2 outputs is on the same supply as bus
communication (Supply 2 loss causes broken connections to the
controller).
•
Field power for Group 2 inputs is on the same supply as bus
communication (Supply 2 loss causes broken connections to the
controller).
17
34
-A
EN
T
5V
24V
S
tan
da
rd
I/O
S
tan
da
rd
I/O
S
tan
da
rd
I/O
S
tan
da
rd
I/O
S
tan
da
rd
I/O
17
34
-E
P2
4A
C
17
34-
O
B
8S
17
34-
IB8S
17
34-
O
B
8S
24V Supply for
Standard I/O Modules
120V AC Supply for
Additional I/O
Modules (optional)
24V Supply for Safety
Inputs and Outputs
5V
5V
120V
AC
24V
S
tan
da
rd
I/O
S
tan
da
rd
I/O
S
tan
da
rd
I/O
S
tan
da
rd
I/O
17
34
-EP
24
D
C
17
34-
IB8S
Group 1
Group 2
Group 3
Supply 1
Supply 2
Supply 3