Bosch DDU S2 Plus - 10 Analog and Frequency Inputs; Features; Analog Inputs

Analog and Frequency Inputs
Features
Analog inputs
▪ 0 to 5 V
▪ 12 bit A/D converter
▪ Switchable 3.01 kOhm pull‐up resistor
▪ 8 kHz acquisition rate, up to 1 kHz recording rate
▪ Linear phase digital filter
Frequency inputs
▪ 5 V Hall‐effect type, 2.5 V trigger level
▪ 20 kHz max. frequency
▪ 10 ms measurement window
Analog inputs
Measurements channels
For each analog channel, several ‘subchannels’ are available.
Measurement labels with the characters ‘raw’ show the exact values in mV.
Measurement labels with the characters ‘_fi’ show filtered values.
The word ‘name’ in the table is a placeholder for the channel’s name.
Measurement label Function
raw_name mV value of sensor
raw_name_fi Filtered mV value of sensor
name Physical value of sensor
name_fi Filtered physical value
Filtered channels are routed through digital low pass filters:
▪ DDU 8 uses A/D converter oversampling and digital filtering to recording
rate
▪ Digital filters eliminate ‘out‐of‐band’ noise
▪ Cut‐off frequency automatically adjusted to recording rate
10
10.1
10.2
10.2.1
Analog and Frequency Inputs | 10
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