Rockwell Automation 1747-ACNR15 ControlNet Adapter Module User Manual - Manual (Page 131)

Publication 1747-UM003A-EN-P
Understanding Your SLC 500/1746 Control System B-39
Heat Dissipation Calculation Example
If your controller consists of the following hardware components, calculate
heat dissipation as shown in the worksheet on Page B-41.
The following table details the total watts dissipated by the modules and
peripheral devices in the above SLC 500 controller.
DTAM Chassis 1 Chassis 2
Peripheral Device
Slot 0 1 2 3 Slot 1 2 3 3
User Power to Peripheral
Table B.10 Watt Dissipation
Chassis 1 Chassis 2
Slot Number Catalog
Number Min. Watts Max. Watts Slot Number Catalog
Number Min. Watts Max. Watts
0 1747-L511 1.75 1.75 4 1746-IA16 .425 4.8
1 1746-BAS 3.75 3.8 5 1746-IA16 .425 4.8
2 1746-IA8 .250 2.4 6 1746-OW16 5.17
5.5
(2)
3 1746-OV8 .675 6.9 7 1746-OW16 5.17 5.7
Peripheral
Device 1747-DTAM 2.5 2.5 Not
Applicable Not
Applicable Not
Applicable Not
Applicable
User Power to
Peripheral Not
Applicable Not
Applicable Not
Applicable Not
Applicable Not
Applicable
2.4
(1) Not
Applicable
(1) The user power on the 1746-P1 power supply for Chassis 2 is being used to power a peripheral (100 mA at 24V dc).
(2) This output card uses 5.5 watts because only 10 points are on at any one time. Using the calculated watts formula - (number of p oints energized x watts per point) +
minimum watts = heat dissipation of module - the calculated watts for the 1746-OW16 module is 5.5W: (10 points X.033) + 5.17 = 5.5W.