Omron CJ - 08-2008 - Example Calculations

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Unit Current Consumption Section 2-6
2-6-2 Example Calculations
Example 1: CPU Rack In this example, the following Units are mounted to a CPU Rack with a CJ1W-
PA205R Power Supply Unit.
Current Consumption
Power Consumption
1.92 A × 5 V + 0.096 A × 24 V
= 9.60 W + 2.304 W
= 11.904 W (
≤25 W)
Example 2: Expansion
Rack
In this example, the following Units are mounted to a CJ-series Expansion
Rack with a CJ1W-PA205R Power Supply Unit.
Current Consumption
Power Consumption
1.41 A × 5 V = 7.05 W (≤25 W)
CJ1W-PD025 5.0 A 0.8 A None 25 W
CJ1W-PD022 2.0 A 0.4 A None 19.6 W
Power Supply
Unit
Max. current consumption Max. total
power
consumption
5-V group
(Internal logic)
24-V group
(Relays)
24-V group
(Service)
Unit Model Quantity Voltage group
5-V DC 24-V DC
CPU Unit CJ1G-CPU45H 1 0.910 A ---
I/O Control Unit CJ1W-IC101 1 0.020 A
Input Units CJ1W-ID211 2 0.080 A ---
CJ1W-ID231 2 0.090 A ---
Output Units CJ1W-OC201 2 0.090 A 0.048 A
Special I/O Unit CJ1W-DA041 1 0.120 A ---
CPU Bus Unit CJ1W-CLK21 1 0.350 A ---
Group Current consumption
5 V DC 0.910 A + 0.020 A + 0.080 × 2 + 0.090 A × 2 + 0.090 A × 2 +
0.120 A + 0.350 A = 1.92 A (≤5.0 A)
24 V DC 0.048 A x 2 = 0.096 (≤0.8 A)
Unit Model Quantity Voltage group
5-V DC 24-V DC
I/O Interface Unit CJ1W-II101 1 0.130 A ---
Input Units CJ1W-ID211 2 0.080 A ---
Output Units CJ1W-OD231 8 0.140 A ---
Group Current consumption
5 V DC 0.130 A + 0.080 A × 2 + 0.140 A × 8 = 1.41 A (≤5.0 A)
24 V DC ---