Omron CJ Series Operation Manual page 110

3 Isolated-type Universal Input Units
Item
Temperature coefficient
Resolution
Input signal range
Maximum rated input
Input impedance
Warmup time
Thermocouple input
Platinum resistance thermometer
input
Conversion cycle
Maximum time to store data in CPU
Unit
Input error detection
Process value alarm
Isolation
Insulation resistance
Dielectric strength
External terminal connections
Indicators
Unit number settings
Current consumption (supplied by
Power Supply Unit)
Dimensions
Weight
* The setting parameters are retained in the CPU unit by the battery even during power interruptions.
3-6
±100 ppm FS/°C max.
For 1/12,000 (voltage or current input) temperature input, refer to Input Types and
Input Ranges on page 3-7.
Voltage or current input:
−5% to 105% of the input range set by scaling
Temperature input:
±20 °C or ±20 °F in relation to the high or low limit for each sensor range.
Voltage input: ±15 V, current input: 30 mA
Temperature input: 10 kΩ max., voltage input: 1 MΩ max., current input: 250 Ω (fixed)
30 min
Internal sensors are used for cold junction compensation.
• Sensing method: 3-wire method
• Allowable lead wire resistance: 20 Ω max. per wire
• Input detection current: 1.1 mA
250 ms/ 4 inputs
Conversion time + CPU Unit one task period
An input error can be detected for each input (excluding voltage or current input of 0
to 20 mA, 0 to 5 V and 0 to 10 V).
Detection level
• Temperature input: When the upper or lower limit of each sensor range is exceeded
by 20°C or 20°F
• 1 to 5 V: Input signal < 0.3 V
• 4 to 20 mA: Input signal < 1.2 mA
Input Error Flag turns ON when a disconnection occurs or the input range is
exceeded.
The process value overrange direction for when an input error occurs can be speci-
fied.
Two process value alarms (L, H), hysteresis, and ON-delay Timer (0 to 60 s) can be
set.
Process value alarm bits can be copied to selectable addresses of Expansion Opera-
tion Data.
Between inputs and internal signals, and between inputs: Power supply = Trans-
former, Signal = Photocoupler
20 MΩ (at 500 V DC) between all inputs
Between all inputs: 500 V AC, at 50 or 60 Hz, for 1 min, leakage current 1 mA max.
Terminal block (detachable)
Three LED indicators on front panel (for normal operation, errors detected at the Uni-
versal Input Unit, and errors detected at the CPU Unit).
Set by rotary switches on front panel, from 0 to 95.
5 VDC at 320 mA max.
31 × 90 × 65 mm (W × H × D)
150 g max.
CJ-series Analog I/O Units Operation Manual for NJ-series CPU Unit(W498)
Specifications