Allen-Bradley 1732ES-IB8XOB8 - Page 57

Rockwell Automation Publication 1791ES-UM001G-EN-P - November 2016 57
Install the Module Chapter 3
As shown in the cell with value set in bold, the maximum input +24V DC
power current through the male power connectors in the daisy chain is 6.5 A.
This value is less than 10 A, so this system is adequate. The I
IP
value for a
module in this system or any daisy chained system cannot exceed 10 A. If the
value exceeds 10 A, the system fails to meet the maximum current requirement
for the module. The maximum current requirement is the maximum current
that any pin on the power connectors can carry, which is 10 A.
The output +24V DC power current that is required for a module in the daisy
chain can be estimated as described here.
I
OP
~ I
OPM
+ I
SO
+ I
SNSO
+ I
OPDC
Where:
I
OP
is the output +24V DC power current through the male power connector
of the module.
I
OPM
is the output +24V DC power current required by the module itself
(with no safety output load current).
I
SO
is the total safety output load current for safety outputs N. Modules with
bipolar safety outputs enter values only in the even numbered I
SO
table
locations. Modules with sourcing-only safety outputs enter values in all ISO
table locations.
I
SNSO
is the total sensor output load current for the Output +24V DC power
output pins (pin 1 in the output I/O connectors).
Table 14 - Input +24V DC Power Calculation
Value Module 1 Module 2 Module 3 Module 4
I
IPDC
4.875 A 3.250 A 1.625 A 0.000 A
I
IPM
0.175 A 0.175 A 0.175 A 0.175 A
I
TO0
0.005 A 0.005 A 0.005 A 0.700 A
I
TO1
0.005 A 0.005 A 0.005 A 0.700 A
I
TO2
0.005 A 0.005 A 0.700 A 0.005 A
I
TO3
0.005 A 0.005 A 0.700 A 0.005 A
I
TO4
0.005 A 0.700 A 0.005 A 0.005 A
I
TO5
0.005 A 0.700 A 0.005 A 0.005 A
I
TO6
0.700 A 0.005 A 0.005 A 0.005 A
I
TO7
0.700 A 0.005 A 0.005 A 0.005 A
I
TO8
0.005 A 0.005 A 0.005 A 0.005 A
I
TO9
0.005 A 0.005 A 0.005 A 0.005 A
I
TO10
0.005 A 0.005 A 0.005 A 0.005 A
I
TO11
0.005 A 0.005 A 0.005 A 0.005 A
I
IP
6.500 A 4.875 A 3.250 A 1.625 A