Power Supply Capacities; Power Calculation Example - GE VersaMax Manual

C

Power Supply Capacities

The Power Supply on the CPU or NIU module provides +5V and +3.3V power to the
modules in the station. Booster Power Supplies can be used if the modules in the system
will draw more current than the CPU or NIU Power Supply can provide. The AC or DC
Power Supply on the CPU or NIU and the Power Supply that resides on the Booster
Carrier must share the same external power source.
For each Power Supply, the maximum total combined output current from the 5V and
3.3V outputs is 1.5 Amps. Each power supply provides a maximum of either 0.25 Amp or
1 Amp on its 3.3V output, as listed in the next table. That portion of the Power Supply's
total output current not drawn from the 3.3V output is available via the 5.5V output.
Catalog
Number
IC200PWR001
IC200PWR002
IC200PWR101
IC200PWR102
IC200PWR201
IC200PWR202

Power Calculation Example

In the example system listed below, the maximum current draw on the Power Supply's
3.3V output by all of the modules will be 0.215 Amp.
Subtracting 0.215A from the Power Supply total output of 1.5A shows that 1.285A will be
available via the 5.5V output:
(1.5A – 0.215A = 1.285A)
Because the maximum current draw on the 5V output would be 0.65A as shown in the
table below, any of the available Power Supplies could be used for this system.
Catalog
Number
IC200CPU001
IC200ALG261
IC200ALG327
IC200ALG331
IC200MDL650
IC200MDL650
IC200MDL742
C-2 VersaMax® Modules, Power Supplies, and Carriers User's Manual – March 2003
Description
24VDC Power Supply
24VDC Expanded 3.3V Power Supply
120/240VAC Power Supply
120/240VAC Expanded 3.3V Power Supply
12VDC Power Supply
12VDC Expanded 3.3V Power Supply
Description
CPU with 2 serial ports, with EZ Program Store device
Analog Input Module, 15 Bit Voltage Differential 8 Channels
Analog Output Module, 13 Bit Voltage 12 Channels
Analog Output Module, 16 Bit Voltage/Current, 1500VAC
Isolation, 4 Channels
Input Module, 24VDC Positive/Negative Logic 32 Points
Input Module, 24VDC Positive/Negative Logic 32 Points
Output Module, 24VDC Positive Logic 0.5 Amp, w/ESCP 32 Pts
Total Current Required by Modules
Maximum Output Current in Amps
Total 5V
(5V + 3.3V)
1.5A (1.5A – I )
3.3V
1.5A (1.5A – I )
3.3V
1.5A (1.5A – I )
3.3V
1.5A (1.5A – I )
3.3V
1.5A (1.5A – I )
3.3V
1.5A (1.5A – I )
3.3V
Backplane Current
Consumption in mA
5V
140
200
50
10
50
50
150
650mA
(0.65A)
3.3V
0.25A
1.0A
0.25A
1.0A
0.25A
1.0A
3.3V
100
115
215mA
(0.215A)
GFK-1504K