Filter
Top Products
SPAN Installation Chapter 2
SPAN-IGM User Manual Rev 2 23
2.3.10 Odometer connection
The SPAN-IGM provides a wheel sensor input for a Distance Measurement Instrument (DMI) through
AUX connector.
If you are using a NovAtel interface cable (part number 01019015):
1. Connect the interface cable to the AUX connector on the SPAN-IGM
2. Connect the wires from the J2 wire bundle to the DMI.
For information about the J2 wire bundle or if you are creating a custom interface cable, refer to
Appendix A, Technical Specifications on page 52 for the interface cable and AUX connector pin out.
3. Send the following commands to setup the wheel sensor.
ENCLOSUREWHEELSENSOR ENABLE 1HZ
SETWHEELPARAMETERS ticks circ spacing
4. Send the following commands to log the wheel sensor data.
LOG TIMEDWHEELDATAB ONNEW
LOG WHEELSIZEB ONCHANGED
2.3.10.1 Odometer Requirements
SPAN-IGM is compatible with any wheel sensor meeting the following requirements:
• Output signal range less than or equal to 45 kHz
• Output signal duty cycle is symmetric 40%-60%
• Output signal voltage is between -11 and +15 VDC.
• Input current draw is less than 150mA at 12 VDC. This is the power supply provided by the
SPAN-IGM.
• Quadrature, pulse and direction type odometers are compatible
An example of a SPAN-IGM compatible odometer is the CWPTA411 from Kistler (www.kistler.com).
A transducer traditionally fits to the outside of a non-drive wheel. A pulse is then generated from the
transducer which is fed directly to the odometer inputs on the interface cable (NovAtel part number
01019015).
The parameters entered in the SETWHEELPARAMETERS command depend on the
wheel sensor being used. See the SPAN on OEM6 Firmware Reference Manual
(OM-20000144) for more information about this command.
Figure 7: Kistler CWPTA411
The CWPTA411 mounts to the wheel lug
nuts via adjustable mounting collets. The
torsion protection rod, which maintains
rotation around the wheel axis, affixes to the
vehicle body with suction cups. Refer to the
Kistler CWPTA411 user manual for mounting
instructions (www.kistler.com).