Omron CJ2 User Manual

5-41
5 Installation
CJ2 CPU Unit Hardware User’s Manual
5-4 Control Panel Installation
5
5-4-2 Humidity
Rapid temperature changes can cause condensation to occur, resulting in malfunctioning due to short-
circuiting. When there is a possibility of this occurring, take measures against condensation, such as
leaving the PLC power ON at night or installing a heater in the control panel to keep it warmer.
The PLC is tested for conformity with the sine wave vibration test method (IEC 60068-2-6) and the
shock test method (IEC 60068-2-27) of the Environmental Testing for Electrotechnical Products. It is
designed so that malfunctioning will not occur within the specifications for vibration and shock. If, how-
ever, the PLC is to be used in a location in which it will be directly subjected to regular vibration or
shock, then implement the following countermeasures:
• Either separate the control panel from the source of the vibration or shock, or secure the PLC and the
panel with rubber padding to prevent vibration.
• Make the building or the floor vibration-resistant.
• To prevent shock during operation to devices in the panel, such as electromagnetic contactors,
secure either the source of the shock or the PLC with rubber padding.
Using the PLC in any of the following locations can cause defective contact with connectors and corro-
sion of components. Implement countermeasures such as purging the air as required.
• In locations exposed to dust, dirt, salt, metal filings, soot, or organic solvents, use a panel with an air-
tight structure. Be careful of temperature increases inside the panel.
• In locations exposed to corrosive gas, purge the air inside the panel to clear the gas and then pres-
surize the inside of the panel to prevent gas from entering from outside.
• In locations where flammable gas is present, either use an explosion-protected construction or do not
use the PLC.
5-4-2 Humidity
5-4-3 Vibration and Shock
5-4-4 Atmosphere
Moisture absorber
Power ON
Control panel
PLC
Heater
Examples of Measures against Condensation

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)