Omron CJ1W-SCU22 Serial Communication Unit

Omron CJ1W-SCU22 Serial Communication Unit

nit classification CJ-series Special I/O Unit

Compatible Racks CJ-series CPU Rack or CJ-series Expansion Rack

Max. number of

Units 10 Units/Rack max. (CPU Rack or Expansion Rack)

CPU Unit data

areas for data

storage/exchange

Special I/O Unit Area (960 words)

CIO 2000 to CIO 2959

20 words/Unit for constant data

exchange (6 output words and 14

input words)

CPU Unit to

Temperature

Control Unit

• Set point (SP)

• Operating commands

• RUN/STOP control

• Start/Stop AT

• Write commands

• Heater burnout set value

Temperature

Control Unit to

CPU Unit

• Process value (PV)

• Set point (SP)

• Status

• Heater current monitor

DM words allocated to Special I/O

Units (9.600 words)

D20000 to D29599

10 words/Unit transferred when

power is turned ON or Unit is

restarted

CPU Unit to

Temperature

Control Unit

• Alarm mode

• Alarm hysteresis

90 words/Unit for regular data

exchange

Two-way transfer

between CPU Unit

and Temperature

Control Unit

• Alarm value

• Input compensation value

• Control period

• Hysteresis

• Proportional band

• Integral time

• Derivative time

• Output monitor

Insulation

resistance

20 MΩ min. (at 500 VDC) between the following points:

• All output and NC terminals and external AC terminals (Power Supply Unit)

• All input terminals and external AC terminals (Power Supply Unit)

• All input terminals and all output terminals

• All external DC terminals (inputs, outputs, and NC) and the FG plate

• Between input terminals (sensor and CT inputs)

• I/O terminals and NC terminals

Dielectric strength

2.000 VAC 50/60 Hz for 1 min., detected current: 1 mA

• The output terminals/NC terminals and external AC terminals (Power Supply Unit)

1.000 VAC 50/60 Hz for 1 min., detected current: 1 mA

• Input terminals and external AC terminals (Power Supply Unit)

• Input terminals and output terminals

• External DC terminals (inputs, outputs, and NC) and the FG plate

500 VAC 50/60 Hz for 1 min., detected current: 1 mA

• Between input terminals (sensor and CT inputs)

• I/O terminals and NC terminals

Internal current

consumption 250 mA max., 5 VDC

Other Other general specifications conform to the CJ-series general specifications.

Dimensions 31 × 90 × 65 mm

Characteristics

*1. The last three digits of the model number indicate the Unit's features:

*2. Indication accuracy of thermocouples

• Accuracy ratings are given for the Temperature Control Unit used in a set with a cold-junction compensator (on the terminal block). Always

use the Unit and terminal block in a set. There are labels with serial numbers attached to the terminal blocks and Units to help keep track of

the sets.

• When returning a thermocouple-type Temperature Control Unit for repair, always return the Unit and the terminal block (with the cold-junction

compensator) as a set.

Item Specification

Model number CJ1W-TC00@ CJ1W-TC10@

Temperature sensor Thermocouple: R, S, K, J, T, L, B Platinum resistance thermometer: Pt100. JPt100

Number of loops 4 loops or 2 loops with heater burnout detection *1

Control output and

heater burnout alarm

output

NPN or PNP outputs, both with short-circuit protection *1

External power supply voltage: 24 VDC

Max. switching capacity: 100 mA (per output)

Leakage current: 0.3 mA max.

Residual voltage: 3 V max.

Temperature control

method ON/OFF control or PID control with two degrees of freedom (Set with pin 6 on the Unit's DIP switch.)

Control operation Forward or reverse operation (Set with pins 4 and 5 on the Unit's DIP switch.)

RUN/STOP control Supported (Controlled from the CPU Unit through bits allocated in the Special I/O Unit area.)

Operation with CPU

Unit in PROGRAM

mode

The Temperature Control Unit can be set to continue operating or stop operating when the CPU Unit is in PROGRAM

mode. (Set with pin 1 on the Unit's DIP switch.)

Auto/Manual switch for

operational output None

Autotuning (AT) of PID

constant Supported (Controlled from the CPU Unit through bits allocated in the Special I/O Unit area.)

Indication accuracy

Celsius: ±0.3% of PV or ±1°C (whichever is larger) ± 1 dig

it max.

Fahrenheit: ±0.3% of PV or ±2°F (whichever is larger) ± 1

digit max.

• L and −100°C or less for K and T are ±2°C ± 1 digit max.

• 200°C or less for R and S is ±3°C ± 1 digit max.

• No accuracy is specified for 400°C or less for B *2

Celsius: ±0.3% of PV or ±0.8°C (whichever is larger) ± 1

digit max.

Fahrenheit: ±0.3% of PV or ±1.6°F (whichever is larger) ±

1 digit max.

Hysteresis (when using

ON/OFF control) 0.0 to 999.9 °C or °F (0.1 °C or °F units)

Proportional band 0.1 to 999.9 °C or °F (0.1 °C or °F units)

Integral (reset) time 0 to 9.999 s (one-second units)

Derivative (rate) time 0 to 9.999 s (one-second units)

Control period 1 to 99 s (one-second units)

Sampling period 500 ms (4 loops)

Output refresh period 500 ms (4 loops)

Display refresh period 500 ms (4 loops)

Input compensation

value −99.9 to 999.9 °C or °F (0.1 °C or °F units)

Alarm output setting

range

−999 to 9.999 °C or °F (1 °C or °F units)

The setting range will be −99.9 to 999.9 °C or °F (0.1 °C or °F units) for K or J with decimal point mode, or platinum

resistance thermometer.

External terminal

connections Removable terminal block with 18 points (M3 screws)

Effect on the CPU Unit's

cycle time 0.4ms