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Description

This board has 4 analogue inputs. Each of the inputs can be set to an input range of 100mV, 1V or 10V full scale. The inputs are bipolar, both positive and negative input voltages can be measured. All inputs are optically isolated from each other and from the system. The maximum voltage between two channels and between a channel and ground is 500 VDC. There is a special version that allows 1kV.

The common mode rejection is better than 60dB (1000x).

Each of the channels is calibrated individually. The initial accuracy is better than 0.5%.

The input range is set with jumpers. Due to the isolation of the inputs, the input range is not set automatically to the selected range in the software (as on the other analogue input boards). The input range must be set in the software and on the board.

Specifications

width

4 TE

power supply

+/-15Vdc,  < 80mA

input type

bipolar, differential, optically isolated

common-mode rejection

> 60dB (1000x)

common-mode voltage

max. 500V

input range

100mV, 1V, 10V full scale

input impedance

1 MOhm

jumpers

input range, board address

initial accuracy

0.5%

temperature operating

-10...+50°C

temperature storage

-20...+70°C

temperature drift output

< 25 ppm / °C 

temperature drift zero

< 10 µV / °C

resolution

20.000 counts (5µV, 50µV, 500µV)

A/D converter

V/F conversion

Connections

pin

signal

address jumpers

1

+ channel 4

2

0 channel 4

3

- channel 4

4

0V system

5

+ channel 3

6

0 channel 3

7

- channel 3

8

0V system

input range jumpers

9

+ channel 2

10

0 channel 2

11

- channel 2

12

0V system

13

+ channel 1

14

0 channel 1

15

- channel 1

16

0V system

 

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Last modified on: 23-11-2006