Wilcoxon Sensing Technologies 4-20 mA Alarm Module, Model iT401
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Model iT401 4-20 mA Alarm Module

Brand: Wilcoxon Sensing Technologies
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The iT401 is the first alarm module designed to work with any 4-20 mA loop-powered device and/or the iT Series sensor signal-conditioning modules, providing easily-programmable relay activation for use in condition-based monitorinng or process control. 

Digital technology, along with simple face-panel push-buttons and a bright digital display means never having to open the unit to alter setpoints. Memory allows user to decide to keep changes permanently, or restore manufacturer defaults.
Features
  • 35 mm DIN rail mount
  • Front-panel tactile membrane switches give access to all settings
  • Front-panel 7-segment LED displays
  • TBUS connection to iT Series modules
  • Digital processing
  • Relays have over 2,000 Vac isolation
  • Mounts adjacent to iT Series transmitter modules
  • External alarm contacts for signal or BOV faults
  • Alternate direct 4-20 mA signal input

Specifications

Brand

Approvals & Certifications

  • CE

Delay Time

  • Alarm Action Delay (Each Alarm): 0 to 99 seconds

Display

  • Front Panel Alarm LED Display: Orange LED (BOV)
  • Front Panel Alarm LED Display: Red LEDs (High)
  • Front Panel Alarm LED Display: Yellow LED (Low)
  • Front Panel Digital Display: Dual 7-Segment Yellow LED, 0.3” (7.62 mm)

Electrical Connectors

  • Front Panel Connectors: 4-Position Removable Screw Terminal Plugs

Humidity

  • Maximum 95 % Relative Humidity, Non-Condensing

Input Signal

  • 4-20 mA

Load

  • Input Signal (Loop Load): 247.5 ohms, ± 5 %
  • Relay Contact Load (Inductive): 1/3 HP, 125 Vac
  • Relay Contact Load at 70° C (158° F) Resistive: 8 A at 250 Vac
  • Relay Contact Load at 70° C (158° F) Resistive: 8 A at 30 Vdc
  • Relay Contact Load at 85° C (185° F) Resistive: 5 A at 250 Vac
  • Relay Contact Load at 85° C (185° F) Resistive: 5 A at 30 Vdc

Mounting

  • 35 mm DIN “T” Rail

Operating Temperature

  • -40° to 85° C (-40° to 185° F)

Output

  • Redundant 4-20 mA Output: 2 to 22 mA

Power Requirement

  • 24 Vdc Nominal
  • Curretn, Max. 150 mA

Range

  • Altitude, Above Sea Level, Max. 3,000 metres (10,000 ft)

Relay Operation

  • Alarm Relay Function: Latching or Non-Lataching

Vibration Effect

  • Alarm Set Point [Each Alarm (Vibration Signal)]: 0 to 99 % of Full Scale, in 1 % Increments

Voltage

  • Alarm Set Point [Each Alarm (Bias Voltage)]: 0-18 V in 1 V Steps

Documentation

Data Sheets

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