MoTeC Appendices 43
Speed Inputs
Hall mode
A 2200 ohm pull-up resistor is connected to 2.7 V
Suitable for
Switch to 0 V
Logic signal
Open collector device (e.g. Hall Switch)
Pull-up Resistor
2200 ohms to 2.7 V
Voltage Range
0 to 15 V
Trigger Threshold
Selectable between -1.33 V and 4.68 V
Magnetic mode
The pull-up resistor is disengaged and the trigger
levels can be varied depending on the input
frequency
Suitable for
Two wire magnetic sensor (variable reluctance
sensor)
Input Resistance
100k ohms to ground (no pull-up)
Voltage Range
-80 V to +80 V
Programmable
Trigger Levels
-1.33 V to 4.68 V
For both modes
Update Rate
100 times / second
Filter Time Constant
25 usec
Hysteresis
0.17 V min
Measurement
Methods
Frequency
Resolution 0.1 Hz
Maximum Frequency 3200 Hz
Falling Edge Triggered
Period 1 usec
Measures period between falling edges
Resolution 1 usec
Maximum 32 msec
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