Yokogawa Pulse to Analog Converter, VJQ8
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VJQ8 Pulse to Analog Converter

Brand: Yokogawa Electric Corporation

This plug-in type pulse to Analog converter receives contact pulse, voltage pulse, or current pulse from the field and converts the signal into isolated DC current or voltage signals.
Features
  • Output-2 can be selected from DC voltage signal, DC current signal communication function (RS-485), or alarm output (2 relay contacts)
  • Various parameters such as input range can be set and modified using a PC (VJ77) or Handy Terminal (JHT200 and the like)
  • A pulse integration function that converts integrated flow value (average pulse frequency) through specified sampling time into Analog signals is provided

Specifications

Brand

Accuracy

  • ± 0.1 % of Span

Alarm

  • 0 to 100 % of Input Range - Alarm Setting Range

Approvals & Certifications

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

Communication

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

Current

  • 12-50 mA - Permissible Input Current

Display

  • 2 LEDs
  • Front LED Lights at Alarm

Dissipation

  • 3.3 W at 24 Vdc & 110 Vdc - Power Dissipation
  • 4.1 W at 24 Vdc & 110 Vdc - Power Dissipation
  • 6.2 VA at 100 Vac - Power Dissipation
  • 7 VA at 100 Vac - Power Dissipation
  • 8.1 VA at 200 Vac - Power Dissipation
  • 9 VA at 200 Vac - Power Dissipation

Distance

  • 3,937 feet (1,200 metres) - Max.

Electrical Connectors

  • M3 Screw Terminal
  • Plug-In Connector

Electrical Contacts

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

Electrical Rating

  • 30 Vdc at 1 A - Contact Capacity

Enclosure, Body Material

  • Polyphenylene Oxide

Filter

  • 10 ms Approximately of Time Constant - Input Filter

Frequency

  • 0 to 10 Hz - Input Frequency
  • 0.1 to 100,000 Hz - Input Frequency
  • Lowcut Point: 0.01 Hz to 100 % of Input Frequency
  • On Setting: 100 Hz Less - Input Frequency

Humidity

  • 5 to 90 % RH, Non-Condensing

Hysteresis

  • 0 to 100 % of Input Range
  • 3 % (Alarm-1/2)

Input

  • -1 to 8 Vdc - Low Level (On Input)
  • 2-50 Vdc - High Level (off Input) & Pulse Width
  • 58 Vdc or Less - Max.

Input Signal

  • 15 Vdc / 15 mA or more
  • 2-Wire Typical ON/OFF Contact
  • 3-Wire Typical Voltage Pulse (Transmitter Power Supply Available)
  • Current Pulse (Transmitter Power Supply Available)
  • Voltage Pulse

Insulation Resistance

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

Measurement Accuracy

  • Within ± 20 % of the Range During Testing

Mounting

  • DIN Rail
  • VJ Mounting
  • Wall Mounted

Output

  • 0-100 mVdc
  • 0-20 mA DC
  • -10 to 10 Vdc

Output Format

  • Relay Contact

Power Supply

  • 100-240 Vac/dc (-15 %, 10 %) 50/60 Hz - Power Supply Rated & Input Voltage
  • 12 Vdc ± 10 % (4-30 mA Output) - Transmitter Power Supply
  • 15-30 Vdc (± 20 %) - Power Supply Rated & Input Voltage
  • 24 Vdc ± 10 % (4-30 mA Output) - Transmitter Power Supply

Power Supply Effect

  • ± 0.1 % or Less of Span for Power Supply Voltage Fluctuation of 85-264 Vac (47-63 Hz) / DC & 12-36 Vdc

Pulse Range

  • 30 µs for less than 10 kHz of Input Frequency

Resistance

  • 1 ohm or Less - Output Resistance
  • 100 ohms or Less - Output Resistance
  • 100 to 2,200 ohms - External Shunt Resistance
  • 15 kΩ or more Current Pulse - Input Resistance
  • 350 to 250,000 ohms - Permissible Load Resistance
  • 500 kΩ or more - Output Resistance

Resolution

  • 0.1 %, 4 Significant Digits
  • 1 second

Response Time

  • 100 ms + 2 Intervals of Input Pulse 63 % Response (10 to 90 %) when in F/V Conversion Mode

Span & Zero Adjustments

  • ± 10 % of Span - Output Span Adjustment
  • ± 5 % - Output Zero Adjustment
  • ± 5 % of Span (Output-1 Signal, -10-10 Vdc) - Output Span Adjustment

Supply Voltage

  • 1,000 Vac/minute between Input, Output-1 & Output-2 when Alarm Output - Withstand Voltage
  • 12-36 Vdc
  • 2,000 Vac/minute between Input, (Output-1, Output-2), Power Supply, & Ground Mutually - Withstand Voltage
  • 85-264 Vac (47 to 63 Hz)/DC

Temperature Effect

  • ± 0.2 % or Less of Span for a Temperature Change of 10° C (18° F)

Temperature Range

  • 0° to 50° C (32° to 122° F)

Update Time

  • 0.1 to 100 seconds - Sampling Time

Documentation

Data Sheets

Product Manuals

Brochure

Product Drawing

Technical Information

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