Yokogowa Universal Temperature Converter, VJU7
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VJU7 Universal Temperature Converter

Brand: Yokogawa

This plug-in type universal temperature converter converts input signal (thermocouple, RTD or mV signal) into isolated DC voltage signal or DC current signal.
Features
  • Universal Input Enables Selection of Input Type (Thermocouple, RTD, mV Signal) and of Measuring Ranges within Specifications
  • DC Voltage Signal, DC Current Signal, Communication Output (RS-485), or Alarm Output (2 Relay Contacts) is Selectable as Output-2
  • Change of Input Types / Input Ranges/Burnout Action, and I/O Monitoring etc. Can be Done Through Handy Terminal (JHT200 etc)
  • For the Fahrenheit Display, Specify the Option “/DF”

Specifications

Brand

Accuracy

  • ± 0.1% of Span
  • ± 1° C (± 1.8° F) (Except for Typical R, S) for Terminal Temperature 25° ± 15° C (77° ± 27° F) - Reference Junction Compensation Accuracy
  • ± 2° C (± 3.6° F) (Typical R, S) for Terminal Temperature 25° ± 15° C (77° ± 27° F) - Reference Junction Compensation Accuracy

Alarm

  • 0 to 100% of Input Range - Alarm Setting Ranges
  • High/Low Limit Alarm - Alarm Operating Direction

Approvals & Certifications

  • CAN/CSA C22.2 No. 61010-1
  • CE EN 61326-1
  • EMC
  • KC
  • UL 61010-1

Burn-Out

  • Within 60 seconds - Burn-out Time

Communication

  • 2-Wire Half-Duplex (Start-Stop Synchronization, Non-procedural)
  • Baud Rate: 1,200, 2,400, 4,800, 9,600 bit/sec
  • Data Length: 7-bits, 8-bits
  • EIA RS-485
  • LADDER Communication
  • Modbus ASCII/RTU
  • PC-Link Communication Protocol
  • PC-Link with Sum
  • Stop Bit: 1-bit, 2-bits

Current

  • About 0.5 mA - RTD Detective Current

Display

  • Front LED Lights at Excitation, 2 LEDs - Alarm Operation Display

Dissipation

  • 2.6 W at 24 Vdc & 110 Vdc - Power Dissipation
  • 5 VA at 100 Vac - Power Dissipation
  • 6.7 VA at 200 Vac - Power Dissipation

Distance

  • 3,937 feet (1,200 meters) - Maximum

Electrical Connectors

  • M3 Screw Terminal

Electrical Contacts

  • Normally Closed - Output 2
  • Normally Open Contact Output (Contact ON at Excitation) 2-Points, COM Common - Output Signal

Electrical Rating

  • 1 A at 30 Vdc - Contact Capacity

Enclosure, Body Material

  • Modified Polyphenylene Oxide

Humidity

  • 5 to 90% Relative Humidity, Non-Condensing

Hysteresis

  • 3% (Alarm-1/2)

Input

  • -10 to 100 mV (M Range) Span is Under 27.5 mV - Thermocouple Input
  • -2.5 to 25 mV (L Range), Span is Under 10 mV - Thermocouple Input

Input Signal

  • mV Signal
  • RTD
  • Thermocouples

Insulation Resistance

  • 100 MegaOhms / 500 Vdc between Input, Output-1, Output-2, Power Supply & Ground Mutually

Measurement Accuracy

  • Within ± 20% of the Range During Testing

Measuring Span

  • 10° C (50° F) or more (RTD)
  • 3 mV or more (Thermocouple, mV Signal)

Mounting

  • Base Mounting (VJCE) - VJ Mounting
  • Compact Plug-in Typical - Construction
  • DIN Rail Mounting
  • Wall Mounted

Output

  • 0 to 100 mVdc
  • 0-20 mA DC
  • -10-10 Vdc
  • 1-5 Vdc
  • 4-20 mA DC

Output Format

  • Alarm Output (2 Relay Contacts)
  • Relay Contact - Signal Typical for Alarm Output

Power Supply

  • 100-240 Vac/dc (-15%, 10%) 50/60 Hz - Power Supply Input & Rated Voltage
  • 15-30 Vdc (± 20%) - Power Supply Input & Rated Voltage

Power Supply Effect

  • ± 0.1% or less of Span for 15-30 Vdc (± 20%), 100-240 Vac/dc - Effect of Power Supply Voltage Fluctuation

Relay Output

  • 2 Relay Contacts

Resistance

  • ± 0.2° C (± 0.36° F) or less of Span for Change of 10 ohms / Wire (RTD) - Effect of Wiring Resistance Change
  • ± 15 μV or less of Span for Change of 100 ohms (Thermocouple) - Effect of Wiring Resistance Change
  • 0 to 176 ohms (M Range), Span is Under 38.6 ohms - RTD Input
  • 0 to 520 ohms (H Range), Span is Under 130 ohms - RTD Input
  • 1 MegaOhm (When Power On) - Input Resistance for Thermocouple, mV Input
  • 1 ohm or less - Output Resistance for 1-5 Vdc
  • 2 KiloOhms or more - Permissible Load Resistance for Output
  • 350 ohms or less for 4-20 mA DC - Permissible Load Resistance for Output 2
  • 4 KiloOhms (When Power Off) - Input Resistance for Thermocouple, mV Input
  • 500 KiloOhms or more - Output Resistance for 4-20 mA DC
  • 500 ohms or less for Thermocouple, mV Signal - Input External Resistance
  • 750 ohms or less for 4-20 mA DC - Permissible Load Resistance for Output 1

Resolution

  • 0.1%, 4 Significant Digits - Setting Resolution
  • 0.1° C - Setting Resolution
  • 1 second - Setting Resolution

Response Time

  • 200 milliseconds, 63% Response (10 to 90%)
  • 350 milliseconds (Input Change 10 to 90%, Alarm Setting Point 50%) - Alarm Output

RTD Type

  • JPt100 (JIS’89)
  • Pt100 (ITS-90) & (IPTS-68)
  • Pt50 (JIS’81)

Sensor, Probe Type

  • B Thermocouple
  • E Thermocouple
  • J Thermocouple
  • K Thermocouple
  • N Thermocouple
  • RTD
  • R Thermocouple
  • S Thermocouple
  • T Thermocouple
  • W3 Thermocouple
  • W5 Thermocouple

Supply Voltage

  • ± 4 Vdc or less - Permissible Applicable Voltage
  • 1,000 Vac/minute between Input, Output-1 & Output-1, Output-2 at Alarm Output - withstand Voltage
  • 2,000 Vac/minute between Input, Output-1, Output-2, Power Supply & Ground Mutually - withstand Voltage

Temperature Effect

  • ± 0.2% or less of Span for a Temperature Change of 10° C (18° F) - Effect of Ambient Temperature Change

Temperature Range

  • 0° to 50° C (32° to 122° F)
  • -200° to 2,000° C (-328° to 3,632° F) - for RTD & Thermocouple Sensor Typicals

Documentation

Product Manuals

Brochure

Product Drawing

Specification

Technical Information

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