Omron CJ2 User Manual

5-35
5 Installation
CJ2 CPU Unit Hardware User’s Manual
5-3 Wiring
5
5-3-5 Connecting I/O Devices
z Output Short-circuit Protection
If a load connected to the output terminals is short-circuited, output components and the printed cir-
cuit boards may be damaged. To guard against this, incorporate a fuse in the external circuit. Use a
fuse with a capacity of about twice the rated output.
z Transistor Output Residual Voltage
A TTL circuit cannot be connected directly to a transistor output because of the transistor's residual
voltage. It is necessary to connect a pull-up resistor and a CMOS IC between the two.
z Output Surge Current
When connecting a transistor or triac output to an output device having a high surge current (such
as an incandescent lamp), steps must be taken to avoid damage to the transistor or triac. Use either
of the following methods to reduce the surge current.
Output Wiring Precautions
OUT
R
COM
L
+
OUT
R
COM
L
+
Method 1
CS/CJ-series
PLC
CS/CJ-series
PLC
Add a resistor that draws about 1/3 of the current consumed by the bulb.
Method 2
Add a control resistor as shown in the following diagram.

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)