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VJA7 Multifunction Distributor
Brand: Yokogawa Electric CorporationThis plug-in type distributor is used in combination with 2-wire type transmitter and converts 4 to 20 mA DC signal into isolated DC current or DC voltage signal.
Features- DC voltage signal, DC current signal, communication output (RS485), or alarm output (2 relay contacts) is selectable as output-2.
- Selection of square root extractor and breakpoint linearization (breakpoint setting), I/O adjustment, I/O monitoring, and loop back test can be made using the optional Parameter Setting Tool (VJ77) or Handy Terminal (JHT200).
- Can be used as a limiter converter when you use a breakpoint linearization function.
- Supports BARD-800.
Specifications
Accuracy
- ± 0.1 % of Span
Alarm
- 0 to 100 % of Input Range - Alarm Setting Range
- High/Low
Approvals & Certifications
- CAN/CSA C22.2 No. 61010-1
- CE EN 61326-1
- EMC
- KC
- UL 61010-1
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
- 25-35 mA - Current Limiter
Display
- Front LED Lights at Excitation, 2 LEDs - Alarm Operation Display
Dissipation
- 3.6 W at 24 Vdc & 110 Vdc - Power Dissipation
- 6.6 VA at 100 Vac - Power Dissipation
- 8.8 VA at 200 Vac - Power Dissipation
Distance
- 3,937 feet (1,200 metres) - Max.
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
- 30 Vdc at 1 A - Contact Capacity
Enclosure, Body Material
- Modified Polyphenylene Oxide
Function
- Square Root Extraction
Humidity
- 5 to 90 % Relative Humidity, Non-Condensing
Hysteresis
- 3 % (Alarm-1/2)
Input
- 40 mA or Less - Permissible Input Current
Input Signal
- 4-20 mA DC from 2-Wire Transmitter
Insulation Resistance
- 100 megaohms at 500 Vdc between Input, Output-1, Output-2, Power Supply & Ground Mutually
Measurement Accuracy
- Within ± 20 % of the Range During Testing
Mounting
- Base Mounting - VJ Mounting
- Compact Plug-In Typical - Construction
- DIN Rail Mounting
- Wall Mounted
Output Format
- Relay Contact - Signal Typical for Alarm Output
Output Signal
- 0 to 100 mVdc
- 0-20 mA DC
- -10 to 10 Vdc
- 1-5 Vdc
- 4-20 mA DC
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
- 24-28 Vdc - Transmitter Power Supply
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
- 1 ohm or Less - Output Resistance
- 2 kiloohms or more - Permissible Load Resistance
- 250 ohms - Input Resistance
- 350 ohms or Less - Permissible Load Resistance (Output-2)
- 500 kiloohms or more - Output Resistance
- 750 ohms or Less - Permissible Load Resistance (Output-1)
Resolution
- 0.1 %, 4 Significant Digits - 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
Supply Voltage
- 1,000 Vac/minute between Output-1 & Output-2, Input & 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 Change of 10° C (18° F) - Effect of Ambient Temperature
Temperature Range
- 0° to 50° C (32° to 122° F) (40° C (104° F) or Less for Side by Side Close Installation)
Version / Leadwires
- 2-Wire Transmitter
