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Yokogawa Digital Limit Alarm, MVRK

MVRK Digital Limit Alarm

Brand: Yokogawa Electric Corporation
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This plug-in type Limit Alarm for RTD input receives RTD signal. It is equipped with Active color PV display (PV display color changing function).
Features
  • Either 2 points of alarms (relay transfer contact [1a1b], 2 points) or 4 points of alarms (relay NO contact, 4 points) can be selected.
  • An alarm status in the event of an alarm can be recognized.
  • Equipped with easy-to-see large LED display as standard.
  • Using the economical mode enables the low power consumption operation (normal operation: approx. 0.5 W, 1 VA).
  • Input range and each parameter setting can be changed by the operation keys on the front panel.
  • Can be equipped with monitor output (1 to 5 V DC, 4 to 20 mA DC or RS-485 communication).

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Specifications

Brand

Accuracy

  • ± 0.1 % ± 1-Digit of Instrument Input Range Span - Input Display & Alarm Action Point Setting Accuracy
  • ± 0.1 % of Output Span - Output Accuracy

Alarm

  • High/Low

Burn-Out

  • Downscale
  • Off
  • Time: 60 seconds or Less
  • Upscale

Communication

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

Consumption

  • 2.5 W at 110 Vdc - Power Consumption
  • 2.7 W at 24 Vdc - Power Consumption
  • 4.2 VA at 100 Vac - Power Consumption
  • 5.4 VA at 200 Vac - Power Consumption
  • Approximately 0.5 W, 1 VA - Normal Operation Using the Economical Mode

Current

  • Approximately 0.5 mA - Detective Current

Display

  • 0.35” (9 mm) - Data Display
  • 0.53” (13.5 mm) - PV (Measured Value) Display
  • 4-Digits - Data & PV (Measured Value) Display
  • 7-Segment - Data & PV (Measured Value) Display
  • Green LED - Data Display
  • Red/Green LED - PV (Measured Value) Display

Distance

  • 1,200 metres - Max.

Electrical Connectors

  • M3.5 Screw Terminal

Electrical Contacts

  • Normally Closed & Normally Open

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

  • ABS Resin (Black), UL 94 V-0

Humidity

  • 5 to 90 % Relative Humidity Non-Condensing

Indication

  • 2 Orange LED for 2-Points of Alarms or 4 Orange LED for 4-Points of Alarms

Input

  • ± 4 Vdc - Max.

Insulation Resistance

  • 100 megaohms at 500 Vdc between Inputs, Alarm Outputs, Power Supply & Monitor Output Mutually

Materials of Construction

  • Modified Polyphenylene Oxide Resin, Including Glass Fiber (Black), UL 94 V-1 - Socket

Mounting

  • DIN Rail Mounting
  • Plug-In Typical - Construction
  • Wall Mounted

Operating Temperature

  • 0° to 50° C (32° to 122° F)

Operating Voltages

  • 85-264 V

Output

  • 1-5 Vdc - Analog Output
  • 4-20 mA DC - Analog Output

Output Format

  • Relay Contact

Power Supply

  • 100-240 Vac/dc (-15 %, 10 %) 50/60 Hz - Power Supply Voltage
  • 24 Vdc ± 10 % - Power Supply Voltage

Power Supply Effect

  • ± 0.1 % of Span or Less - for the Fluctuations within the Allowable Range of Each Power Supply Specification

Relay Operation

  • Energized or De-Energized - PV & Deviation (High-limit Alarm)

Resistance

  • ± 0.2° C or Less for a Change of 10 ohms / Leadwire - Effect of Leadwire Resistance Change
  • 1 Megaohm - Input Resistance During Power On
  • 2 kiloohms or more for 1-5 Vdc - Allowable Load Resistance
  • 350 ohms or Less for 4-20 mA DC - Allowable Load Resistance
  • 4 kiloohms - Input Resistance (During Power Off)

Resolution

  • 1 second - Setting Resolution
  • 1-Digit (0.1° C) - Setting Resolution

Response Time

  • 500 milliseconds

RTD Type

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

Sensor, Probe Type

  • IEC/JIS-standard RTD

Supply Voltage

  • 1,000 Vac/minute - Withstand Voltage between (Alarm Outputs 1 & 4) & (Alarm Outputs 2 & 3) & between Inputs & Monitor Output
  • 2,000 Vac/minute - Withstand Voltage between Inputs, (Alarm Outputs 1, 2, 3, 4), Monitor Output & Power Supply Mutually

Temperature Effect

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

Temperature Range

  • -199.9° to 649° C (-327.8° to 1200.2° F) - Instrument Input Range (M Range)
  • -199.9° to 660° C (-327.8° to 1,220° F) - Instrument Input Range (H Range)

Documentation

Product Manuals

Product Drawing

Specification

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