Analog And Frequency Inputs; Analog Inputs - Bosch DDU 9 Manual

12 | Analog and Frequency Inputs

12.1 Analog inputs

12.1.1 Measurements channels
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12 Analog and Frequency Inputs
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
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
raw_name
raw_name_fi
name
name_fi
Filtered channels are routed through digital low pass filters:
– DDU 9 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
– Linear phase – no signal distortion
– Latency compensation – no filter delay in recorded data
Function
mV value of sensor
Filtered mV value of sensor
Physical value of sensor
Filtered physical value
DDU 9 Bosch Motorsport