VRS Signal Conditioner

A VRS Signal Conditioner takes the unconditioned output from a Variable Reluctance Sensor (VRS), eg: an ABS wheel speed pickup, which is a noisy sine wave and outputs this as a clean square wave signal (similar to the output from a Hall Effect type sensor), suitable for connection to a DL1, DL2 or DASH2.

It can also divide the pulse frequency by a number between 2 and 32. Typically ABS sensors read a wheel with many slots, which gives a high frequency signal.  By dividing the number of pulses the signal is better suited for use with a DL1, DL2 or DASH2. The unit can also be used with a hall effect sensor to divide the pulses.

The VRS signal conditioner can be used to condition the VRS signal, divide the pulses coming from a wheelspeed sensor or both.
When ordering a VRS signal conditioner we therefor need to know whether the signal needs to be conditioned or not and what number (if any) to divide the pulses by. This information is based on the intended speed range and the number of teeth on the wheel speed sensor. If you need assistance with choosing the correct settings please get in touch.

Technical specification

Power supply
Supply voltage   7-16V

Input
VRS mode:
Max input frequency VRS: 5kHz
Input voltage range  0V – 57V

Non-VRS mode:
Max input frequency: 10MHz
Input voltage range  ±20V

Output
Direct mode:
Output divided by 2:
Voltage             0-5V square wave, 5V TTL levels
Duty cycle         50%
Divided output:   
Voltage             0-5V square wave, 5V TTL levels
Duty cycle         50%

VRS mode:
Output divided by 2:
Voltage             0-5V square wave, 5V TTL levels
Duty cycle         50%
Divided output:   
Voltage             0-5V square wave, 5V TTL levels
Duty cycle         50%
Divide range      4,6,8,...,30,32. (only even numbers up to 32)