DESIGNER’S HANDBOOK 4189350049C EN
Page 68 of 206
To use analogue dimmer voltage from another system connected to DIM/HV3+ is possible. Note that the 0V
reference from the external system will be connected to AGND. If the SIN/COS potentiometer is isolated from all
other systems, the AGND is the only connection to another system and therefore it should work fine.
It is even possible to overwrite the internal Vref by and external supply, for example 24V, connected to AGND and
Vref like this:
In this case XDi will continuously measure the voltage on the Vref terminal and calibrate the measurements
accordingly. It will even be able to eliminate slow fluctuations in the 24 V supply voltage, for example if the system
in an emergency is powered by a 24 V battery that is slowly dropping its voltage over time.
5.6.9.4 Double triangle input, ex10V supply for potentiometer
Instead of using a sin/cos potentiometer it is also possible to use a double potentiometer with two tringle shaped
outputs with an angle offset of 90° between the two.
For this angle sensor type, the analogue input 1 and 2 must be setup in the VS profile as a
“Triangle input” pair.
Please note
that you
cannot
change from sin/cos to double triangle input type via the Adjust input menu found in
the XDi installation menu. Instead, you must select a VS profile where double triangle input is supported for the
azimuth angle. (If there is no such VS profile for the virtual indicator you are using, please contact DEIF support or
sales, they can help you find the best solution)
In the following example the double potentiometer is connected to a stable external 0-10V power supply.
Connection of the potentiometer
Terminal 1: 0V supply and AX1 AGND
Terminal 2: To AX1 +HV2 input
Terminal 3: +10V supply
Terminal 5: To AX1 +HV1 input
Potentiometer is shown at 0°
