RS422, Synchronization
The RS422 connection (Pin 11 and 12 of the multifunction port) can be used with
either of the following configurations:
- RS422 (half-duplex): Load user modes, sensor control and transmit measurement
results (Modbus RTU or ASCII-Format).
- Synchronization/triggering: Synchronization respectively triggering using switching
signals.
Trigger, Encoder, Mode Switching
The switching inputs of the multifunction port can either be used for encoder-, trigger
input or for loading previously stored user modes.
The signal levels are switchable for all switching inputs between LLL (TTL logic) and
HLL (HTL logic):
-
LLL level: Low 0 V … 0.8 V, high 2.4 V … 5 V, internal pull-up resistor 10 kΩ to 5V
- HLL level: Low 0 V … 3 V, high 11 V … 24 V (permitted to 30 V), internal pull-up
resistor 10 kΩ to 24 V
-
Pulse duration: ≥ 5 µs
External Laser Switching, optional
The external laser switching-off is implemented as a hardware solution and is a top
priority. The laser can be switched off, in addition, also by software
Use a serial key switch inside the control circuit to switch off the laser.
You will find details for the wiring in the instruction manual, Chap. 5.2.6.
With standard sensors, connecting the supply voltage activates the laser light source
in the sensor.
