Example Calculations - Omron CJ - 08-2008 Operation Manual

Unit Current Consumption
2-6-2

Example Calculations

Example 1: CPU Rack
Example 2: Expansion
Rack
130
Power Supply
Unit
5-V group
(Internal logic)
CJ1W-PD025 5.0 A
CJ1W-PD022 2.0 A
In this example, the following Units are mounted to a CPU Rack with a CJ1W-
PA205R Power Supply Unit.
Unit
CPU Unit CJ1G-CPU45H
I/O Control Unit CJ1W-IC101
Input Units CJ1W-ID211
CJ1W-ID231
Output Units CJ1W-OC201
Special I/O Unit CJ1W-DA041
CPU Bus Unit CJ1W-CLK21
Current Consumption
Group
0.910 A + 0.020 A + 0.080 × 2 + 0.090 A × 2 + 0.090 A × 2 +
5 V DC
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)
Power Consumption
1.92 A × 5 V + 0.096 A × 24 V
= 9.60 W + 2.304 W
= 11.904 W ( ≤ 25 W)
In this example, the following Units are mounted to a CJ-series Expansion
Rack with a CJ1W-PA205R Power Supply Unit.
Unit
I/O Interface Unit CJ1W-II101
Input Units CJ1W-ID211
Output Units CJ1W-OD231
Current Consumption
Group
0.130 A + 0.080 A × 2 + 0.140 A × 8 = 1.41 A (≤5.0 A)
5 V DC
24 V DC ---
Power Consumption
1.41 A × 5 V = 7.05 W ( ≤ 25 W)
Max. current consumption
24-V group
(Relays)
0.8 A
0.4 A
Model Quantity
1
1
2
2
2
1
1
Current consumption
Model Quantity
1
2
8
Current consumption
Section 2-6
Max. total
power
24-V group
consumption
(Service)
None 25 W
None 19.6 W
Voltage group
5-V DC 24-V DC
0.910 A ---
0.020 A
0.080 A ---
0.090 A ---
0.090 A 0.048 A
0.120 A ---
0.350 A ---
Voltage group
5-V DC 24-V DC
0.130 A ---
0.080 A ---
0.140 A ---