Pepper-computer Modular Computers RS485 Bedienungsanleitung PDF herunterladen (Seite 215)

SMART I/O User’s Manual

Chapter 5 Analog Modules

5.3 SM-THERM

5.3.1 Introduction

The SM-THERM supports up to four groups of thermoelement sensors

together with a cold junction (ext. PT100) for accurate temperature measure-

ment. The sensor types shown in the table below may be connected with

corrective calibration for all sensor classes being provided by driver software

running under OS-9. A fast 16-bit delta-sigma A/D converter ensures an

absolute accuracy of 0.2°C.

5.3.2 Specifications

Isolation 1.0 kV Optoisolated from the system

Input

4 Thermocouple groups

1 PT100 for Cold Junction (2-wire)

Open Sensor Detection

Self Calibration

Overvoltage Protection

Temperature Range

Temperature Drift

Conversion Time

Input Impedance

Resolution

Absolute Accuracy

Linearization

: ± 25V (power connected)

: ± 35V (power disconnected)

: Refer to table below

: 1 LSB/°C (not compensated)

: typ. 125 ms, max. 500 ms

(depends on filter settings)

: 10 MΩ (min)

: 16-bit

: ± 0.2°C (sensor errors excluded)

: by software

EEPROM 256-bit serial EEPROM for Calibration Data

Front Panel 2 Red LEDs

Power Cons. 350mW (min.), 450mW (max.)

Temperature Range Standard (0°C to +70°C), Extended (-40°C to +85°C)

Module Weight 40g

ID Byte $61, read by the SPI Interface

Sensor Category

Temperatur

(Low Range)

Temperatur

(High Range

)

Sensor Category

Temperatur

(Low Range)

Temperatur

(High Range

)

R -50°C 1760°C T -270°C 400°C

S -50°C 1760°C E -270°C 1000°C

B0°C 1820°C K -270°C 1370°C

J -210°C 1200°C

1 2 ... 210 211 212 213 214 215 216 217 218 219 220 ... 319 320

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