Mounting and Installation
User Manual QT250 and QT800 gen 2.5, ID 2021 2.3 20. April 2021
Figure 29 shows the location of the Digital Interface connector X2 and signal
pinout. Specifications for Ios are given in section 7.2.2 Digital interface on page
53.
Figure 29: Digital connection interface terminals
The digital interface can be used in various control circuits. Two examples are
shown in Figure 30.
Figure 30: Digital interface options
Caution! The Common input terminal (D1 on X2) is active and has an internal power
supply of 5 V/ 50 mA. Do not attempt to connect an external supply to this
terminal as it can damage the communication interface box. Digital outputs
are passive and need an external power supply to operate.
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