Allen-Bradley micrologix 1500, Руководство пользователя

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Publication 1764-UM001A-US-P
System Loading and Heat Dissipation F-7
Validating System Loading for 1769-PA2 and 1769-PB2 Power
Supplies
Power Supply Current Capacity
System Using a 1769-PA2
To validate your system, the total 5V dc current and 24V dc current consumed
must be considered. The I/O modules must be distributed, such that the current
consumed from the left
or right side of the power supply never exceeds 2A at 5V dc
and 1.0A at 24V dc. Use the current graphs below to determine if the power supply
loading in your system is within the allowable range.
Figure 6.1 1769-PA2 Current with +24V dc User Load = 0A
Figure 6.2 1769-PA2 Current with +24V dc User Load = 0.2A
Specification 1769-PA2 1769-PB2
Expansion Bus Output Current Capacity
at 0° to +55°C (+32°F to +131°F)
2A at 5V dc and 0.8A at 24Vdc
(1)
2A at 5V dc and 0.8A at 24V dc
(1)
24V dc User Output Capacity (0° to +55°C) 250 mA (maximum) not applicable
(1) Refer to the Current Graphs below.
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
0.0
0.5
1.0
1.5
2.0
+5
V
dc L
o
ad (A
mps
)
+24V dc Load (Amps)
Valid Operating Range
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
0.0
0.5
1.0
1.5
2.0
+5
V
dc L
oad (A
mps
)
+24V dc Load (Amps)
Valid Operating Range
AB Spares