Pepper Computer RS232 User Manual

SMART I/O User’s Manual

©1996 PEP Modular Computers GmbH

March 12, 1996

Page 5 - 59

Chapter 5  Analog Modules

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.

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

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