Weidmuller WI-I-O 9-U2-TC User Manual

Installation & Configuration Guide

WI-I/O-9-U2-TC - Thermocouple Adapter for WI-I/O-9-U2

Configuration

On the “I/O Configuration” web page select:

· Select Thermocouple type from the drop down list. Options are Type T, Type J, Type K.

· Select the Polarity from the drop down list (Normal or Reversed)

· Set Thermocouple Error Value to a value the integer registers (30003 and/or 30004) will go to during fail *

· Press “Save and Activate Changes” button.

Thermocouple Range @ Tamb (+10- +40)

Type Normal Reverse

Type T - 25°C to + 365°C - 200°C to + 70°C Type K Type J

Installation

The WI-I/O-9-U2-TC adaptor board plugs into the bottom 6 terminals on the WI-I/O-9-U2 terminal strip. A separate 14 way terminal strip is provided to allow connection to the remaining terminals.

Address locations

38005 = 32 bit Floating Point temperature value 38007 = 32 bit Floating Point Cold Junction value 30003 = Scaled 16 bit Analog value 30004 = Scaled 16 bit Cold Junction value

Analog Input Scale Examples

· For normal Polarity setting Zero and Span to 0 and 100 respectively will scale the register to read the temperature as an integer value, e.g. 148.25 °C will read 14825 or 26.51 °C will read 2651

· For normal Polarity, setting Zero and Span to 15019 and 682.6667 respectively will scale the register so that a temperature of -10 to 50°C will give a scaled range of 8192 to 49152

· For Reverse Polarity, setting Zero and Span to 30948 and 455.106 respectively will scale the register so that a temperature of -50 to 40°C will give a scaled range of 8192 to 49152

- 25°C to + 455°C - 200°C to + 70°C

- 10°C to + 345°C - 210°C to + 60°C

Connections

Caution:

ESD Sensitive pins. Use ESD handling precautions.

Thermocouple input terminals must be within +/- 5V of the WI-I/O-9-U2

‘GND’ terminal

Thermocouple Range @ Tamb (-40- +60)

Type Normal Reverse

Type T 0°C to + 330°C - 200°C to + 5°C Type K

Type J

If ‘Thermocouple

Polarity’ selection is

reversed

Thermocouple wires

must be swapped,

e.g. (red) to TC+ &

(blue) to TC-

Constantan

(red)

* Error Value is set in register 30003

when the thermocouple is open circuit.

* Error Value is set in register 30003

and 30004 when the thermocouple adaptor is not fitted

0°C to + 410°C - 200°C to + 5°C

15°C to + 300°C - 210°C to + 10°C

Thermocouple Adapter

-Ve

+Ve

N/C N/C

COM

TC-

TC+

Copper (blue)

Normal Type “T”

Thermocouple

(+24V)

PWR RF 232 485

WI-I/O 9-U2

6720005011

Dip Switches

D1 D2 D3 D4 D5 D6 D7 D8

1 2 3 4 5 6

GND+24V + - + GND+24V

AI 1 AI2

AI 1

All Dip Switches

AI2

AI3 AI4

AO1 AO2

+ +

must be set to

the OFF position.

Revision 1.6 - Oct 2011

Inst_WI-I/O-9-U2_TC_Adaptor_V1.6.vsd