Troubleshooting power ratings, P/s active – Rockwell Automation 1771-P7 AC (120/220V) 16A Power Supply Installation Instructions User Manual
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P/S
Active
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AC (120/220V) 16A Power Supply
12
Publication 1771ĆIN056B EN-P - December 2001
Line 1
Line 2 or
neutral
Ground
Bus
ac power connectors
Grounding electrode
conductor
acpower
(customer
supplied)
À
A 3A 250V normalĆblow fuse protects the input line L1 from drawing more than 3 amperes.
14 AWG
L1
L2/N
GND
central ground bus (earth ground)
low side of the line power
high side of the line power
À
Connect
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The power supply has a green P/S ACTIVE LED that provides status
indication during power supply operation.
Normal operation
If indicator is Then
on
off
it may be due to:
input voltage not within specified range
blown fuse
overcurrent
Important: If a shutdown condition occurs, wait 15 seconds before
attempting to apply power.
For additional assistance, contact your local Allen-Bradley
representative.
Use these graphs to determine your:
•
cooling requirements
•
power cost
•
transformer size (unless the transformer manufacturer has a
recommended multiplier for sizing a transformer for an ac-to-dc
power supply)
0
4
8
12
16
20
60
100
140
180
0
4
8
12
16
0
30
60
90
120
Apparent Power (VA)
Real Power (Watts)
Backplane
Load Current
(Amps)
0
4
8
12
16
0
75
150
225
300
Transformer Sizing(VA) =
Real Power (Watts) x 2.5
Troubleshooting
Power Ratings