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Rockwell Automation Publication 2080-UM002N-EN-E - November 2022 333
Appendix
F
System Loading
Calculate Total Power for Your Micro830/Micro850/Micro870
Controller
To calculate Total Power for your Micro830, Micro850, and Micro870 controller, use the
following formula:
Total Power =Main Unit Power + No. of Plug-ins * Plug-in Power + Sum of Expansion
I/O Power
Example 1:
Derive Total Power for a 24-point Micro830 controller with two plug-ins.
Total Power = 8 W+ 1.44 W * 2 + 0 = 10.88 W
Example 2:
Derive Total Power for a 48-point Micro850 controller, with 3 plug-ins, and 2085-IQ16 and
2085-IF4 expansion I/O modules attached.
Total Power = 11 W + 3*1.44 W + 0.85 W + 1.7 W = 17.87 W
Table 91 - Micro830, Micro850, and Micro870 Power Requirements
Controller/Module Power Requirement
Micro830, Micro850, and Micro870
(without plug-in/expansion I/O)
10/16-point
24-point
48-point
5 W
8 W
11 W
Plug-in modules, each 1.44 W
Expansion I/O
(system bus power consumption)
2085-IQ16
2085-IQ32T
2085-IA8
2085-IM8
2085-OA8
2085-OB16
2085-OV16
2085-OW8
2085-OW16
2085-IF4
2085-IF8
2085-OF4
2085-IRT4
–
–
–
–
–
–
–
–
–
–
–
–
–
0.85 W
0.95 W
0.75 W
0.75 W
0.90 W
1.00 W
1.00 W
1.80 W
3.20 W
1.70 W
1.75 W
3.70 W
2.00 W