Analog and Frequency Inputs
Features
24 analog inputs with Software Upgrade 2; 4 analog inputs without upgrade
▪ 0 … 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
4 frequency inputs with Software Upgrade 2; no frequency inputs without up‐
grade
▪ 5 V Hall‐effect type, 2.5 V trigger level
▪ 20 kHz max. frequency
▪ 10 ms measurement window
4 PWM outputs
▪ Low‐side switch
▪ Up to 2 A each
▪ Output frequency selectable
Analog inputs
Measurement 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
10
10.1
10.2
10.2.1
Analog and Frequency Inputs | 10
Bosch Motorsport
DDU 8 Manual
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