E–4 Power Supply Worksheet
Publication
1747-6.2
Procedure
Required Power Supply for this Chassis:
1746-
1. For each slot of the chassis that contains a module, list the slot number, the catalog number of the module, and its 5V and 24V 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: _______ Chassis Number: _______
slot _______
slot _______
slot _______
slot _______
slot _______
slot _______
slot _______
slot _______
Catalog
Number
Maximum Currents
5V 24V
Peripheral
Device:
_________
_________
_________
_________
_________
_________
_________
_________
______________
______________
______________
______________
______________
______________
______________
______________
_________ ______________
2. Add the power supply loading currents for
all the system devices ( at 5V and 24V).
______________
3. Compare the Total Current required for the chassis with the Internal Current Capacity of the power supplies
.
To select the proper power supply for your chassis, make sure that the power supply loading current for the chassis is less than the internal current
capacity for the power supply, for both 5V and 24V loads.
Required Power Supply for this Chassis:
1746-
slot _______
slot _______
slot _______
slot _______
slot _______
slot _______
slot _______
slot _______
Catalog
Number
Maximum Currents
5V 24V
Peripheral
Device:
_________
_________
_________
_________
_________
_________
_________
_________
______________
______________
______________
______________
______________
______________
______________
______________
_________ ______________
______________
2
( x 5V)+ (x 24V)
Total
P
ower
Total Current:
When using the 1746-P4 power supply, use the formula below to
calculate total power consumption of all the system devices (at 5V
and 24V). Note that the 1746-P4 Chassis total power supply loading
currents cannot exceed 70 Watts. If you are not using a 1746-P4
power supply, proceed to step 3.
Total Current:
Total
current
Total
current
( x 5V)+ ( x
Total
P
ower
Total
current
Total
current
+ x 24V) = W
(
User
Current
( x 24V) = W
24V)
+
User
Current
Note:
Consider future system expansion when selecting a power supply
.
Internal Current Capacity
5V 24V
Catalog Number 1746-P1 2.0A| 0.46A
Catalog Number 1746-P2 5.0A| 0.96A
Catalog Number 1746-P3 3.6A| 0.87A
Catalog Number 1746-P4
10.0A| 2.88A
(70 W
atts maximum)
Catalog Number 1746-P5 5.0A| 0.96A
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