Omron CJ2 User Manual

5 Installation
5-22
CJ2 CPU Unit Hardware User’s Manual
z Crimp Terminals
The terminals on the Power Supply Unit are M4, self-raising terminals with screws.
Precautions for Correct UsePrecautions for Correct Use
• Use crimp terminals for wiring.
• Do not connect bare stranded wires directly to terminals.
• Tighten the terminal block screws to the torque of 1.2 N·m.
• Use crimp terminals (M4) having the dimensions shown below.
Precautions for Safe Use
• Be sure not to reverse the positive and negative leads when wiring the power supply terminals.
• Supply power to all of the Power Supply Units from the same source.
• Do not remove the protective label from the top of the Unit until wiring has been completed.
This label prevents wire strands and other foreign matter from entering the Unit during wiring
procedures.
• Do not forget to remove the label from the top of the Power Supply Unit after wiring the Unit.
The label will block air circulation needed for cooling.
• To help prevent electrical shock, ground the ground terminal (GR: ) with a ground resistance of
less than 100 Ω using a 14-gauge wire (minimum cross-sectional area of 2 mm
2
).
• The line ground terminal (LG: ) is a noise-filtered neutral terminal. If noise is a significant source of
errors or electrical shocks are a problem, connect the line ground terminal to the ground terminal and
ground both with a ground resistance of less than 100 Ω.
• The ground wire should not be more than 20 m long.
• The CJ-series PLCs are designed to be mounted so that they are isolated (separated) from the
mounting surface to protect them from the effects of noise in the installation environment (e.g., the
control panel).
• Do not share the PLC’s ground with other equipment or ground the PLC to the metal structure of a
building. The configuration shown in the following diagram may worsen operation.
Grounding
7 mm max.
7 mm max.
Crimp Terminals for DC Power Supplies
POWER
PA205R
DC24V
AC240V
OUTPUT
RUN
INPUT
AC100-240V
L2/N
L1
LG (Noise-filter neutral terminal)
Ground this terminal to less than 100
Ω
to improve noise resistance and prevent
electric shock.
GR (Ground terminal)
Ground this terminal to less than 100
Ω
to
prevent electric shock.

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)