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
|