Omron CJ2 User Manual

5-13
5 Installation
CJ2 CPU Unit Hardware User’s Manual
5-2 Installation
5
5-2-4 Connecting PLC Components
Precautions for Correct UsePrecautions for Correct Use
• Always turn OFF the power supply before connecting Units to each other.
• Always turn OFF the power supply to the entire system before replacing a Unit.
• A maximum of nine Configuration Units can be connected to a CPU Rack, and a maximum of
ten Configuration Units can be connected to an Expansion Rack. If more than the maximum
number of Units are connected, a too many I/O points error (fatal error) will occur and the CJ2
CPU Unit will not operate in either RUN or MONITOR mode. If this occurs, The I/O Overflow
Flag (A401.11) will turn ON and A407.13 to A407.15 (I/O Overflow Details 2) will turn ON.

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)