Introduction; 1.1 Introduction To Resistance Temperature Detector; 1.2 Features - Honeywell 2MLF-RD4A User Manual

1.1 Introduction to Resistance Temperature Detector

This user's guide describes the specifications, handling, and programming methods of
Resistance Temperature Detector (RTD), 2MLF-RD4A module.
The RTD input module converts the input temperature data (analog value) measured by
platinum RTD sensor (Pt100 or JPt100), to signed 16-bit binary data (digital value).
This module is used in association with CPU module of MasterLogic-200 PLC series
(hereafter referred to as 2MLF-RD4A).

1.2 Features

2MLF-RD4A has following features:
1. Module Selection: You can select an appropriate input module based on the
application requirement.
2MLF-RD4A: 4-channel input
2. Choice of RTD Sensors: Two types of RTD sensors are available:
a) Pt100
b) JPt100
3. Disconnection Detection: A function to display the connection status of each wire
of the RTD sensor and channel. The internal disconnection detecting circuit detects
and displays disconnection of RTD sensor wire or extended lead wire from the RTD
module. This results in an 'Out-of-range' error in the output voltage.
4. Temperature Conversion:
a) Temperature can be converted to Celsius or Fahrenheit scale as desired.
b) It can also be converted to numeric value accurate up to the first decimal
place.
Temperature Scaling:
5.
a) Temperature-converted input value can be scaled to specified 16-bit binary
data.
R200 Resistance Temperature Detector 2MLF-RD4A User's Guide
September 2010

1. Introduction

Honeywell
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