A Simple Microcontroller-Based 4-20 mA Current Loop Receiver for Sensors with Current Transmitters | Zendy

Arif Surachman | Zendy; Asep Suhendi | Zendy; Maman Budiman | Zendy; Mikrajuddin Abdullah | Zendy; Khairurrijal Khairurrijal | Zendy

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A Simple Microcontroller-Based 4-20 mA Current Loop Receiver for Sensors with Current Transmitters

Author(s) -

Arif Surachman,

Asep Suhendi,

Maman Budiman,

Mikrajuddin Abdullah,

Khairurrijal Khairurrijal

Publication year - 2011

Publication title -

jurnal otomasi kontrol dan instrumentasi

Language(s) - English

Resource type - Journals

eISSN - 2085-2517

pISSN - 2460-6340

DOI - 10.5614/joki.2010.2.1.2

Subject(s) - multiplexer , microcontroller , serial communication , transmitter , computer science , current loop , current (fluid) , amplifier , computer hardware , universal asynchronous receiver/transmitter , electronic engineering , electrical engineering , multiplexing , engineering , chip , telecommunications , channel (broadcasting) , bandwidth (computing)

A current loop receiver system based on a microcontroller has been developed. The current loop receiver system can serve 8 gas sensors with 4-20 mA outputs, which are handled by employing a multiplexer. The data acquisition of the system is composed of a common operational amplifier-based current loop receiver, a CD4051 multiplexer, an ADS7822 serial analog to digital converter (ADC), and an AT89S52 microcontroller. The measured gas concentration is displayed on the 7-segments or transmitted to a personal computer via the RS232 serial communication to be processed by the Microsoft Excel. Additional functions such as gas concentration level warning and error code display are also provided. Keywords : 4-20 mA, Current loop, Microcontroller, Receiver, Transmitter

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