Long Cable Runs (Speed Sensors)
The cable resistance target of below 10 Ω for accelerometer cables is also appropriate for most speed sensors - refer to the conductor size (AWG) table in the Long Cable Runs (Accelerometer) topic for the resulting cable run limits.
The speed sensor signal is a series of pulses so its transmission on the cable is also dependent upon the cable capacitance and the maximum pulse rate. Maximum pulse rate = maximum expected RPM x number of pulses per revolution. Guidelines for a typical 100 pF/m (30 pF/ft) cable are:
Last Reviewed: 10/Jun/2009 Source: vbOnline Reference Guide Revision 11 April 2009 - page 16