Model 1420A

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(Industrial)
Model 1420A:    4-20 mA Input / Output Network Bridge

Datasheet      XIF File

Description

The Model 1420A forms a bridge between industry-standard 4-20 mA transmitters/actuators and LonWorks devices.  While the functionality of the Model 1420 is not new, its packaging allows it to essentially become part of the wiring conduit.  One side simply fastens directly into most standard 4-20 mA transmitters or actuator via their 1/2 inch NPT wiring entry.  The other side of the Model 1420 is a 3/4 inch NPT that allows attachment of any standard electrical conduit box.  This approach greatly reduces the amount of wiring and space required for interfacing sensors to digital networks.

Although it is very compact, the Model 1420 electronics include a central processing unit, precision sense resistors, analog to digital converter, and a network communication interface.  The communication interface is the FTT-10 transceiver.  This allows multiple sensors and actuators to be used over a simple four-wire bus installation.  Two wires are used for power, the other are used for digital communication.

Key Features

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Instantly integrate any standard 4-20 mA sensor and or actuator into the LonWorks  network

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Input and output can be rescaled anywhere between 0-24 mA

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4-20 mA input supports loop and self powered sensors

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4-20 mA output will drive receivers with input impedance in excess of 1200 ohms

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Electronics are potted for environmental durability

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Digitally calibrated for accuracy and custom inputs

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Input and output are reverse voltage protected and current limited

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1/2 inch NPT connection attaches directly to most sensors’ conduit entry

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3/4 inch NPT wiring conduit connection attaches to any standard wiring junction box

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Multiple sensors multiplexed on same wires

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All outputs and inputs available using Standard Network Variables (SNVT)

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Compact and rugged body for durability

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Very compact package becomes part of the wiring conduit

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Last modified: December 07, 2005