Sm-Pt100; Introduction; Specifications - PEP Modular Computers Modular Computers RS485 User Manual

Chapter 5 Analog Modules

5.2 SM-PT100

5.2.1 Introduction

The SM-PT100 is used for 2, 3 or 4-wire temperature measurement using
PT100 sensors driven by an on-board constant current source. Temperature
measurements between -200 C and + 850 C are possible with corrective
calibration for the two possible PT100 4-wire classes being provided in
driver software for OS-9 operation. A fast 16-bit delta-sigma A/D converter
ensures an absolute accuracy of 0.2 C.

5.2.2 Specifications

Isolation
Input
EEPROM
Front Panel
Power Cons.
Temperature Range Standard (0 C to +70 C), Extended (-40 C to +85 C)
Module Weight
ID Byte
March 12, 1996
1.0 kV Optoisolated from the system
4 PT100 groups
4-wire connection supported
Open Sensor Detection
Self Calibration
Overvoltage Protection
Temperature Range
Temperature Drift
Conversion Time
Input Impedance
Resolution
Absolute Accuracy
Linearization
256-bit serial EEPROM for Calibration Data
2 Red LEDs
350mW (min.), 450mW (max.)
40g
$60, read by the SPI Interface
©1996 PEP Modular Computers GmbH
SMART I/O User's Manual
: 25V (power connected)
: 35V (power disconnected)
: -200 C to 850 C
: 1 LSB/ C (not compensated)
: typ. 125 ms, max. 500 ms
(depends on filter settings)
: 10 M (min)
: 16-bit
: 0.2 C (sensor errors excluded)
: by software
5
Page 5 - 29