71
Publication 1747-SG001D-EN-P — January 2009
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.
Chassis Number 1
Maximum Currents
Chassis Number 2
Maximum Currents
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
Peripheral Device
1747-AIC
0.085 A
Peripheral Device
1747-AIC
0.085 A
Peripheral Device
Peripheral Device
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.
Current
Multiply By
=Watts
Current
Multiply 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.
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www.fa-market.com
AoteWell International.inc
Tel: +852-6563-2160
