Specifications

Publication 1747-SG001E-EN-E - February 2013
Select SLC 500 Power Supplies 83
Power Supply Worksheet Example
Procedure
1. For each slot of the chassis that contains a module, list the slot number, catalog number of module, and its 5 V and 24 V maximum currents. Also include the power consumption of any peripheral
devices that may be connected to the processor other than a DTAM, HHT, or PIC - the power consumption of these devices is accounted for in the power consumption of the processor.
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Slot Number Cat. No. 5V dc 24V dc Slot Number Cat. No. 5V dc 24V dc
0 1747-L511 0.350 A 0.105 A 0 1747-L514 0.350 A 0.105 A
1 1746-IV8 0.050 A
⎯
1 1746-OW16 0.170 A 0.180 A
2 1746-OB8 0.135 A
⎯
2 1746-NO41 0.055 A 0.195 A
3 1746-OA16 0.370 A
⎯
3 1746-NO41 0.055 A 0.195 A
4 1746-NO41 0.055 A 0.195 A
5 1746-NO41 0.055 A 0.195 A
6 1746-IO12 0.090 A 0.070 A
A 580.0
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eciveD larehpirePeciveD larehpireP
2. Add loading currents of all system devices at 5
and 24V dc to determine Total Current.
0.905 A 0.190 A
2. Add loading currents of all system devices at 5
and 24V dc to determine Total Current.
0.830 A 1.220 A
3. For 1746-P4 power supplies, calculate total power consumption of all system devices. If not using a 1746-P4, go to step 4.
CurrentMultiply By =Watts CurrentMultiply by = Watts
Total Current at 5V dc 0.905 A 5V 4.525 W Total Current at 5V dc 0.830 A 5V 4.15 W
Total Current at 24V dc 0.190 A 24V 4.56 W Total Current at 24V dc 1.220 A 24V 29.28 W
User Current at 24V dc 0.500 A 24V 12.00 W User Current at 24V dc 0.500 A 24V 12.00 W
Add the Watts values to determine
Total Power (cannot exceed 70 W) 21.085 W
Add the Watts values to determine
Total Power (cannot exceed 70 W) 45.43 W
4. Choose the power supply from the list of catalog numbers below. Compare the Total Current required for the chassis with the Internal Current capacity of the power supplies. Be sure the Total Current
consumption for the chassis is less than the Internal Current Capacity for the power supply, for both 5 V and 24 V loads.
Catalog Number
Internal Current Capacity
Catalog Number
Internal Current Capacity
5V dc 24V dc 5V dc 24V dc
1746-P1 2.0 A 0.46 A 1746-P1 2.0 A 0.46 A
1746-P2 5.0 A 0.96 A 1746-P2 5.0 A 0.96 A
1746-P3 3.6 A 0.87 A 1746-P3 3.6 A 0.87 A
1746-P4 (See step 3) 10.0 A 2.88 A 1746-P4 (see step 3) 10.0 A 2.88 A
1746-P5 5.0 A 0.96 A 1746-P5 5.0 A 0.96 A
1746-P6 5.0 A 0.96 A 1746-P6 5.0 A 0.96 A
1747-P7
12V input 2.0 A 0.46 A
1747-P7
12V Input 2.0 A 0.46 A
24V input 3.6 A 0.87 A 24V Input 3.6 A 0.87 A
Required Power Supply 1746-P1 Required Power Supply 1746-P4
See P7 current capacity chart on page 69.