Omron CJ2 User Manual

3 Nomenclature and Functions
3-18
CJ2 CPU Unit Hardware User’s Manual
*1 The AC and DC values above are given for a cold start, and the AC values are at room temperature. The AC inrush con-
trol circuit uses a thermistor element with a low-temperature current control characteristic. If the ambient temperature is
high or the PLC is hot-started, the thermistor will not be sufficiently cool, and the inrush current given in the table may be
exceeded by up to twice the given value. When selecting fuses or breakers for external circuits, allow sufficient margin in
shut-off performance. The DC inrush control circuit uses a capacitor-charging delay circuit. If the power is OFF for only a
short time for a hot-start, the capacitor will not sufficiently charge and the inrush current given in the table may be
exceeded by up to twice the given value.
*2 Supported only when mounted to CPU Rack.
*3 Disconnect the Power Supply Unit’s LG terminal from the GR terminal when testing insulation and dielectric strength.
Testing the insulation and dielectric strength with the LG terminal and the GR terminals connected will damage internal
circuits in the CPU Unit.
*4 Change the applied voltage gradually using the adjuster on the Tester. If the full dielectric strength voltage is applied or
turned OFF using the switch on the Tester, the generated impulse voltage may damage the Power Supply Unit.
*5 Maintain an ambient storage temperature of -25 to 30°C and relative humidity of 25% to 70% when storing the Unit for
longer than 3 months to keep the replacement notification function in optimum working condition.
*6 CJ1W-PD022 is not insulated between the primary DC power and secondary DC power.
*7 Internal components in the Power Supply Unit will deteriorate or be damaged if the Power Supply Unit is used for an
extended period of time exceeding the power supply output capacity or if the outputs are shorted.

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)