DESIGNER’S HANDBOOK 4189350049C EN
Page 67 of 206
5.6.9.2 Sin/cos dual input with +24V as potentiometer supply
The SIN/COS potentiometer is supplied form 0 to +24V and the used type of potentiometer will create an artificial
0V point on AGND. From the AX1 input it looks like the potentiometer is supplied by a +/-12V source.
This setup will work fine even if the 24V supply is also used as voltage supply for XDi, simply because the AX1
input circuit is galvanic separated from XDi voltage supply.
In this example XDi is setup to share the azimuth angle measurement with other XDi indicators on the CAN bus.
Note: AX1 in Slot1, DIM/HV3+ can be used for connection of a dimmer potentiometer between AGND and Vref.
However, the potentiometer should be isolated from 0V and also ships ground.
Use of an analogue dimmer voltage from another system is not recommended in this application example, unless
you use a 2
nd
AX1 module on Slot 2 and connect the dimmer voltage to DIM/HV3+ on this module instead (it may
require a new product profile with analogue dimmer setup from AX1 on slot 2.
5.6.9.3 Sin/cos dual input with Vref as potentiometer supply
In the following example the double potentiometer is connected to Vref on the AX1 module.
In this case XDi is setup to use Vref as supply for the potentiometer and it will measure Vref and automatically set
the analogue centre value to ½ Vref. The voltage input range can be setup to +/-7.5V in this case.
Note 1: Input DIM/HV3+ can be used for a dimmer potentiometer between AGND and Vref. Do not to overload the
Vref output, max. current is 10mA.
