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VJTK Thermocouple Input Limit Alarm
Brand: Yokogawa Electric Corporation
This Plug-in type Limit Alarm for thermocouple input receives thermocouple signal.
Features- Each parameter setting can be changed using a PC (VJ77 PC-based Parameters Setting Tool) or the Handy Terminal (JHT200).
- For the Fahrenheit display, specify the option “/DF”.
Specifications
Accuracy
- ± 0.1 % of Span
- ± 1° C (± 1.8° F) - Reference Junction Compensation Accuracy (Typical K, J, T, E, B, N, W3 & W5)
- ± 2° C (± 3.6° F) - Reference Junction Compensation Accuracy (Typical R, S) at 25° C (77° F) ± 15° C (27° F)
Alarm
- 0 to 100 % of Input Range - Alarm Setting Range
- Upper & Lower Limit Alarms - Direction of Alarm Action
Burn-Out
- 60 seconds - Burn-Out Time
- Down
- Off
- Up
Consumption
- 1.9 W at 24 Vdc, 110 Vdc - Power Consumption
- 4.1 VA at 100 Vac - Power Consumption
- 5.1 VA at 200 Vac - Power Consumption
Current
- 0.05 µA - Burn-Out Detective Current
Electrical Connectors
- M3 Screw Terminal
Electrical Rating
- 0.1 A at 120 Vdc - Resistive Load
- 0.5 A at 220 Vac - Resistive Load
- 1 A at 120 Vac
- 1 A at 30 Vdc
Enclosure, Body Material
- Modified Polyphenylene Oxide Resin
Humidity
- 5 to 90 % Relative Humidity Non-Condensing - Operating Humidity
Hysteresis
- 0 to 100 % of Input Range - Hysteresis Setting Range
- 3 % of Input Range (Alarm 1 & Alarm 2)
Indication
- LED - Front Panel Lights
Insulation Resistance
- 100 megaohms at 500 Vdc between Input, Output 1, Output 2, Power Supply & Grounding Terminals Mutually
Measuring Span
- 3 mV or more (Converted Into Thermoelectromotive Force)
Mounting
- DIN Rail Mounting
- VJ Mounting Base
- Wall Mounted
Operating Temperature
- 0° to 50° C (32° to 122° F)
Output Format
- Relay Contact
Output Function
- NO Contact Output
Power Supply
- 100-240 Vac/dc (-15 %, 10 %), 50/60 Hz
- 15-30 Vdc (± 20 %)
Power Supply Effect
- ± 0.1 % of Span or Less for the Fluctuations within the Allowable Range of Each Power Supply Voltage Specification - Effect of Power Supply Voltage Fluctuations
Relay Operation
- Energized or De-Energized Under Normal Condition - Direction of Relay Action
Resistance
- 1 megaohms (During Power On) - Input Resistance
- 4 kiloohms (During Power Off) - Input Resistance
- 500 ohms or Less - Allowable Leadwire Resistance
Resolution
- 0.1 % - Alarm & Hysteresis Setting Resolution
- 0.1° C, with Four Significant Digits - Setting Resolution
- 1 second (However, about 0.2 second is to be added to the set time to prevent wrong operation) - Alarm ON & OFF setting resolution
Response Time
- 450 milliseconds (Time to Alarm Output when the Input Change is 10 to 90 % & Alarm Set Point is 50 %. when the Alarm Delay Setting & Hysteresis are Min.)
Sensor, Probe Type
- B Thermocouple (RH)
- E Thermocouple (CRC)
- J Thermocouple (IC)
- K Thermocouple (CA)
- N Thermocouple
- R Thermocouple
- S Thermocouple
- T Thermocouple (CC)
- W3 Thermocouple
- W5 Thermocouple
Supply Voltage
- ± 4 Vdc - Max.
- 1,000 Vac/minute between Output 1 & Output 2 Termianls - Withstand Voltage
- 2,000 Vac/minute between Input, (Output 1, Output 2), Power Supply & Grounding Terminals Mutually - Withstand Voltage
Temperature Effect
- ± 0.2 % of Span or Less for a Temperature Change of 10° C (18° F) - Effect of Ambient Temperature Change
Temperature Range
- 0° to 1,000° C (32° to 1,832° F) - Input Range
- -200° to 2,000° C (-328° to 3,632° F) - Guaranteed Range
Update Time
- 0 to 999 seconds - Alarm ON & OFF Delay Setting Range
