R-sensors LLC
Bldg. 1, 4, Likhachevsky proezd, Dolgoprudny, 141701, Russia
+7 (498) 744-69-95,
NDAS-N. User Manual.
73
Type of alarm relay contacts
SPDT
Normally closed / normally open
Maximum voltage at the alarm relay
contacts
250 V AC or
220 V DC
Test signal generator:
signal waveform and amplitude
Calib enable
Calib out
Logic '1' of 3.3 V voltage
at the time of the calibration signal
sine 1 V peak-peak, 1 Hz, 10 Hz;
single pulse 1 V; meander 1 V,
noise-like signal 1 V RMS.
Test signal generator:
output resistance
100 Ohm
19.4 Analog subsystem parameters, main ADC
ADC type
Sigma delta with the differential input
Number of channels
6 independent ADCs
Sampling frequency
1, 5, 10, 25, 50, 100, 125, 250, 500,
1000, 2000, 4000, 8000 Hz
ADC resolution
24 bit
ADC noise level
21.8 bits noise-free resolution at 100 sps
Bandwidth for
1 – 4000 sps
0.91 of the Nyquist frequency
(0,455 of sampling frequency)
Reduction in the noise suppression
for 1 – 4000 sps
-173 dB
Dynamic range
signal / noise
133 dB at 100 sps
ADC conversion coefficient at the
1:1 divisor and Gain=1
1,144 ∙ 10
Input divisor
1:1, 1:6 switched by the program
Input amplifier
1, 2, 4, 8, 12 switched by the program
