Appendix BSpecifications
189
Note The figures shown in the “maximum current supplied” and “maximum power supplied” columns are com-
puted with the power consumed by the Backplanes, CPU, Memory Cassettes, Peripheral Devices, I/O
Power Supply Units, and Slave Units already calculated.
Design the system so that the following conditions are satisfied.
Condition 1
(1) (Total current consumption of all Units in the 5-V system) ≤ (the figure in the
5-V column)
(2) (Total current consumption of all Units in the 26-V system) ≤ (the figure in the
26-V column)
(3) (Total current consumption of all Units in the 24-V system) ≤ (the figure in the
24-V column)
Condition 2
(1) x 5 V + (2) x 26 V + (3) x 24 ≤ (maximum power supplied)
In the C200HS-CPU01-E/CPU01-EC/CPU21-E/CPU21-EC/CPU31-E, the
maximum power drawn from the 5-V power supply depends upon the current
consumption, as shown below.
Max. Power vs. Current Supplied
Total Power Consumption (W)
Current Drawn from 5-V Supply (A)
C200HS-CPU01-E/CPU01-EC/CPU21-E/CPU21-EC/CPU31-E
0
0
(W)
(A)
26.5
23.5
2.3
3.9
Calculating Current and Power Consumption
The method of calculating current and power consumption is demonstrated here using the following Unit combina-
tions as examples.
Example 1: Units Mounted to C200HS-CPU01-E CPU Rack
OC221 Contact Output Units: 4 Units
ID001 No-voltage Input Units: 3 Units
LK202 Host Link Unit: 1 Unit
External power supply used: 0.3 A
Power Supply
Current Consumption Power Consumption
5-V system 0.001 x 7 + 0.25 = 0.32 A (≤ 3.9 A) 0.32 A x 5 V = 1.6 W
26-V system 0.075 x 4 = 0.30 A (≤ 0.6 A) 0.30 A x 26 V = 7.8 W
24-V system 0.06 x 3 + 0.3 = 0.48 A (≤ 0.8 A) 0.48 A x 24 V = 11.52 W
Total = 20.92 W (≤ 26.5 W)
Example 2: Units Mounted to C200H-PS221 Expansion I/O Rack
ID212 DC Input Units: 6 Units
CT002 High-speed Counter Units: 2 Units
External power supply used (for ID212): 0.8 A
Power Supply
Current Consumption Power Consumption
5-V system 0.01 x 6 + 0.3 x 2 = 0.66 A (≤ 2.7 A) 0.66 A x 5 V = 3.3 W
26-V system 0 0
24-V system Ext. power supply = 0.8 A (≤ 0.8 A) 0.8 A x 24 V = 19.2 W
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