Omron CJ2 User Manual

2 Basic System Configuration and Devices
2-18
CJ2 CPU Unit Hardware User’s Manual
The amount of current/power that can be supplied to the Units mounted in a Rack is limited by the
capacity of the Rack’s Power Supply Unit. Refer to the following tables when designing your system so
that the total current consumption of the mounted Units does not exceed the maximum current for each
voltage group and the total power consumption does not exceed the maximum for the Power Supply
Unit.
For details on calculating the current consumption of Units, refer to 2-1-2 CPU Rack, 2-1-3 Expansion
Racks, and 2-1-4 Configuration Units.
The following table shows the maximum currents and power that can be supplied by Power Supply
Units in CPU Racks and Expansion Racks.
Note 1 When calculating current/power consumption in a CPU Rack, be sure to include the power required by the
CPU Unit itself, as well as the I/O Control Unit if one or more Expansion Racks is connected.
2 Be sure to include the power required by the I/O Interface Unit when calculating current/power consump-
tion in an Expansion Rack.
Example 1: In this example, the following Units are mounted to a CPU Rack with a CJ1WPA205R
Power Supply Unit.
2-1-5 Calculating Unit Current Consumption
Maximum Current and Power Supplied by Power Supply Units
Power Supply Unit
Max. current consumption
Max. total power
consumption
5-V group
(internal logic)
24-V group
(relays)
24-V group
(service)
CJ1W-PA205R 5.0 A 0.8 A None 25 W
CJ1W-PA205C 5.0 A 0.8 A None 25 W
CJ1W-PA202 2.8 A 0.4 A None 14 W
CJ1W-PD025 5.0 A 0.8 A None 25 W
CJ1W-PD022 2.0 A 0.4 A None 19.6 W
Example Calculations
Unit Model Quantity
Volt age group
5-V 24-V
CPU Unit CJ2H-CPU68-EIP 1 0.820 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 Unit CJ1W-OC201 2 0.090 A 0.048 A
Special I/O Unit CJ1W-DA041 1 0.120 A ---
CPU Bus Unit CJ1W-CLK23 1 0.350 A ---
Current consump-
tion
Calculation 0.820 A + 0.020 + 0.080 ×
2 + 0.090 × 2 + 0.090 × 2 +
0.120 + 0.350
0.048 × 2
Result 1.83 A (≤5.0 A) 0.096 A (≤0.8 A)
Power consump-
tion
Calculation 2.51 × 5 V = 9.15 W 0.096 A × 24 V = 2.304 W
Result 9.15 + 2.30 = 11.45 W (≤25 W)

Omron CJ2 Specifications

General

Model	CJ2
Manufacturer	Omron
Type	Programmable Logic Controller (PLC)
CPU Units	Multiple models available (e.g., CJ2M, CJ2H)
Number of I/O Points	Up to 2, 560 points
Communication Ports	Ethernet/IP, EtherCAT, USB, Serial
Expansion	Yes, via I/O Units and Special I/O Units
I/O Control Method	Cyclic Scan, Interrupt
Programming Language	Ladder diagram, structured text, function block diagram, sequential function chart, instruction list
Built-in I/O	Available on some models (e.g., CJ2M)
Ethernet Port	Yes, 1 port (depending on CPU Unit)
Serial Ports	RS-232C, RS-422/485 (configurable)
USB Port	Yes (for programming and monitoring)
Operating Temperature	0°C to 55°C
Storage Temperature	-25 to 70°C
Humidity	10 to 95% RH (non-condensing)
Vibration Resistance	10 to 57 Hz, Amplitude: 0.075 mm, 57 to 150 Hz, Acceleration: 1 G, X, Y, and Z directions, 80 min each
Power Supply Voltage	24 VDC or 100 to 240 VAC (depending on CPU Unit)