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surfaceCONTROL 3D 3500
Digital Signals
The four digital connections of the multi-function interface provided can operate option-
ally as inputs or outputs. They are configured using the software. All digital ports share
a joint ground GND GPIO. External auxiliary power (max. 30 V) is required to use the
outputs.
The digital signals are not suitable for brief signal pulses or time-critical signals.
The exception is port 1, which, when configured correctly, can be used as a hardware
trigger to start a measurement and is directly connected to the sequence control in the
sensor.
The functionality of the digital signals can be programmed (see
).
In addition to direction, polarity can also be switched for the inputs and outputs.
Internal sensor signals can be assigned to the digital outputs, for example, to control
additional connected devices.
Inverter selection
(software side)
Direction selection
(software side)
(Output) Line 1
Trigger/GPIO1
(Output) Line 2
GPIO2
(Output) Line 3
GPIO3
(Output) Line 4
GPIO4
false
true
(IO) Line 1
false
true
(IO) Line 2
false
true
(IO) Line 3
false
true
(IO) Line 4
Input
Output
Input
Output
Input
Output
Input
Output
Fig. 5 Programmable inputs and outputs
