4-20mA Remote Temperature Signal Transmission

Temperature Transmitter

Convert thermocouple or RTD signals into immune 4-20 mA current outputs for long-distance transmission to PLC, DCS, or remote control systems.

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Temperature Transmitter Overview

A temperature transmitter converts the thermocouple or RTD signal to a 4-20 mA output signal and is the ideal solution for many remote temperature measurement applications. 4-20ma transmitters have definite advantages over conventional temperature measuring devices, but must be selected with caution in order to avoid “ground loop” problems.

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Temperature Transmitter

Feature

AC power is not required at the remote location in order to operate a two-wire transmitter
The supply of additional power at the remote location is not needed, as transmitters are powered by a low level 4 - 20 mA output current signal. Additionally, the usual 24 Vdc signal necessary for operation is standard in plants that have increased amounts of instrumentation.
Electrical noise and signal degradation are not a problem for two-wire transmitter users
When it comes to ambient electrical noise, the transmitter's current output signal lends itself to a high immunity. Any noise that does appear in the output current is usually prevented by the common-mode rejection of the receiving device. In addition, the current output signal will not diminish (change) with distance as can be seen in most voltage signals.
Wire costs decrease significantly when using transmitters

Application

Used in many Industries to transmit temperature in 4-20 mA signal from remote Temperature Sensor to PLC or any other control system.

Manufacturer Specifications:

Emerson Honeywell Siemens Wika Dwyer Jumo

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