IT-1605, a module for the measurement of thermocouples and mV signals

TCL2 modules 18.03.2020 16:38 18.03.2020 16:38

The IT-1605 expansion module contains 8 analogue inputs with a common terminal and 2 analogue outputs with a common terminal. The inputs are universal and they can be configured independently as voltage inputs for small values or for measurement of thermocouples; with a 16-bit resolution, the module processes the values measured, conversion to engineering units, etc. The analogue outputs have a 10-bit resolution, the voltage is -10 up to +10 V. The analogue inputs and outputs are galvanically isolated from the internal voltage and the TCL2 communication, and the status of each input is indicated on the module panel.The module is fitted with removable screw connectors.

The module is in a 4M box.

The connectors of the module are removable standard ones with a cage terminal in the removable part, with 3.5 mm spacing. Detailed parameters of the connectors are specified in Chapter 13.


 

The analogue inputs AI0 ÷ AI7

Voltage ranges

-0.1 ÷ +0.1 V

-1 ÷ +1 V

Thermocouples

J

K

R

S

B

T

N

–210 ÷ +1200 °C

–200 ÷ +1372 °C

–50 ÷ +1768 °C

–50 ÷ +1768 °C

+250 ÷ +1820 °C

–200 ÷ +400 °C

–200 ÷ +1300 °C

Input impedance in signal range:

> 1 MΩ

Measurement time of one channel

typically 65 ms (100 ms for thermocouples)

Recovery time value of each channel

typically 250 ms (400 ms for thermocouples)

Cold junction compensation sensor (CJC)

Ni1000, W100 = 1.617

 

 

The Analogue outputs AO0, AO1

Output range

-10 V ÷ 10 V

Maximum output value

105 % of the output range upper limit

A minimum output value

-105 % low limits of the output range

Maximum output current

10 mA

Maximum load capacity

50 nF

 

 

Basic parameters

Supply voltage

24 VDC, +25 %, –15 %

Typical power consumption

1.7 W

Maximum power consumption

2.5 W

 


Fig. 1 The basic wiring diagram of the IT-1605 module

Wiring notes:

  1. The analogue inputs and outputs have a common AGND terminal.

  2. When measuring the analogue signals (1V, 0.1 V) it is recommended to connect the AI- terminals with signal ground AGND (the A6 terminal).

  3. The CJC input is designed only to measure the cold junction during direct measurement of thermocouples. The connected sensor must be the Ni1000 type.