ETAS
Technical Data
ES930.1
-
User Guide
95
13.9.5
Analog Input Channels ("AI" Connection)
Number of channels
8
Measuring ranges
-1
V to +1
V
-10
V to +10
V
-60
V to +60
V
Resolution
16 bit, one A/D converter per channel
Sampling rate
0.5 samples/s to 10 ksamples/s, addi
-
tionally events; configurable per chan
-
nel
Anti-aliasing filter (hardware filter)
Low-pass 2nd order (Bessel),
3-dB limit frequency 10
kHz
Digital low-pass filter
Digital FIR low-pass 8th order (Butter
-
worth) with adjustable limit frequency,
can be disabled
Automatic setting:
0.4 * sampling frequency
Manual setting:
see table
Input impedance
Measuring ranges ±10
V, ±60
V:
2
M
|| 350
pF
Measuring range ±1
V:
10
M
|| 250
pF
Maximum measurement error
(at room temperature)
Measuring range ±1
V:
±(0.5
mV + |U
IN
|
*
0.1%)
Measuring range ±10
V:
±(5
mV + |U
IN
|
*
0.1%)
Measuring range ±60
V:
±(30
mV + |U
IN
|
*
0.1%)
Max. voltage drift (temperature),
temperature range -40
°C to +70
°C
Measuring range ±1
V:
±(10
V + |U
IN
|
*
50
ppm)/K
Measuring range ±10
V:
±(100
V + |U
IN
|
*
50
ppm)/K
Measuring range ±60
V:
±(600
V + |U
IN
|
*
50
ppm)/K
Maximum input voltage
Input:
±60
V DC, all measuring ranges
Input-to-input:
60
V DC
/
30
V AC
Input-to-ground of voltage supply:
60
V DC
/
30
V AC
Input-to-housing:
60
V DC
/
30
V AC
Electrical isolation
Input-to-input, input-to-supply voltage,
input-to-housing