xix
Connecting sensors and switches
6 Installation
Instruction book, IQAN- Lx
Connecting sensors and switches
Connecting sensors to the voltage inputs
The sensor signal range must be 0-5 Vdc. To detect signal errors such as short circuits
or interruptions the active signal range is recommended to be within 0.5-4.5 Vdc.
Active signal range.
The current consumption related to the voltage input is negligible.
The following describes the connection of any analog sensor. This includes
temperature, pressure, angle and position sensors. The positive terminal of the sensor is
connected to the +VREF position and the corresponding negative terminal to the -
VREF position. The sensor signal is connected to appropriate VIN position. For a
resistive type element, select the potentiometer value for the sensor to achieve the best
linearity.
N
OTICE
The negative terminal of the sensor must not be connected to the chassis.
Maximum load for VREF position, see Appendix A, on page xxiii.
EXAMPLE
Connect the positive and negative terminals of the position sensor to
+VREF, position C2:8, and -VREF, position C2:7, respectively. Then
connect the sensor signal to VIN-A, position C2:10.
Connecting VREF and sensor signal VIN-A.
0
5
[V]
Active signal range
Error detection range
Error detection range
t
-VREF, pos. C2:7
+VREF, pos. C2:8
VIN-A, pos. C2:10
Position Sensor
1
2
3
10
11
12
