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Appendix H
Specifications for External Power
Supply Expansion
When using the external power supply for AC-power-supply CPU Units, the following limitations apply:
The external power supply for AC-power-supply CP1H CPU Units manufactured since July 2008 (Model CP1H-
XDR-A) can be used beyond 300mA within the capacity range of the power supply built in the CPU Units.
Please calculate the usable capacity of external power supply according to the following example.
• Calculation example of the capacity limit of external power supply
Example 1
Example 2
For AC-power-supply CPU Units manufactured before July 2008, the specifications are as written in 2-2-1 Gen-
eral Specifications for CP1H CPU Units.
CPU Units Expansion (I/O) Units Total Limit
1
st
unit 2
nd
unit 3
rd
unit
Model
CP1H-XA40DR-A
Model
CP1W-DA041
×3 units
Model
CP1W-40EDR
×1 unit
None
5V 0.42A 0.24A 0.08A 0.0A 0.47A ≤2.0A
24V 0.07A 0.372A 0.09A 0.0A 0.532A ≤1.0A
Power
consumption
5V×0.74A=3.7W
24V×0.532A=12.768W
Tot al
16.468W ≤30W
Usable capac-
ity of external
power supply
30W (Total of usable power consumption)
-
16.468W=13.532W
13.532W/24V=564A
0.564A ≤1.0A
CPU Units Expansion (I/O) Units Total Limit
1
st
unit 2
nd
unit 3
rd
unit
Model
CP1H-XA40DR-A
None None None
5V 0.42A 0.0A 0.0A 0.0A 0.42A ≤2.0A
24V 0.07A 0.0A 0.0A 0.0A 0.07A ≤1.0A
Power
consumption
5V×0.42A=2.1W
24V×0.07A= 1.68W
Tot al
3.78W ≤30W
Usable capac-
ity of external
power supply
30W (Total of usable power consumption)
-
3.78W=26.22W
26.22W/24V=1.09A
Note: use the external power supply under 1.0A even if the calculation
result exceeds 1.0A
1.0A ≤1.0A
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