Chapter 4 SPAN Operation
CPT7 and CPT7700 Installation and Operation User Manual v12
95
Kistler provides an M12 to DB9 cable for use with the WPT DMI. However, certain revisions of this
cable do not bring through all four signal inputs. SPAN systems require at a minimum the A+ and A-
signals for distance. All four signal inputs are required to measure both distance and direction
correctly. See your WPT documentation for cable details.
Kistler Cable
CPT7
M12 Connector
IO2 Cable
Pin
Signal
Pin on AUX 2
Pin 1
GND
Pin 8
Pin 2
+U
B
(Input Power)
External
Pin 3
Signal A+
Pin 14
Pin 4
Signal A-
Pin 15
Pin 5
Signal B+
No Connection
Pin 6
Signal B-
Pin 7
Reserved
No Connection
Pin 8
Table 14: Kistler to NovAtel Wheel Sensor Cable Connections
This modification is for the Kistler WPT 8-pin M12-plug cable number 14865.
The WPT requires power to operate, which is not supplied through the CPT7. Pins 1 and 2 should
therefore be connected to an external power supply (+10 to +30 VDC).
4.5.4 DMI Connected to a CPT7
on the next page shows an overview of a DMI connected to a CPT7.