MoTeC C185 - Manual (Page 52)

MoTeC Appendices
47
Speed Inputs
Hall mode A 2200 ohm pull-up resistor 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 15V
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