ETAS ES930.1 - Page 95

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