Pepper Computer Modular Computers RS485 - Manual (Page 215)

SMART I/O User’s Manual
©1996 PEP Modular Computers GmbH March 12, 1996 Page 5 - 59
5
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 M
Ω
(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 Temperature
(Low Range)
Temperature
(High Range)
Sensor Category Temperature
(Low Range)
Temperature
(High Range)
R -50
°
C 1760
°
C T -270
°
C 400
°
C
S -50
°
C 1760
°
C E -270
°
C 1000
°
C
B 0
°
C 1820
°
C K -270
°
C 1370
°
C
J -210
°
C 1200
°
C