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scanCONTROL 25xx
RS422, Synchronisation
The RS422 connection (pins 11 and 12 of the multifunction port) can be used in either
of the following configurations:
- RS422 (half-duplex): Load programs, control sensor and transmit measurement
results (Modbus RTU or ASCII format).
- Synchronization/triggering: Synchronization or triggering using switching signals.
Trigger, Encoder, Mode Switching
The switching inputs of the multifunction port can either be used for encoder input,
trigger input or to load previously stored user modes.
The signal levels are switchable for all switching inputs together via software between
LLL (low-voltage-, TTL logic) and HLL (high-voltage-, HTL logic):
-
LLL: Low 0 V … 0.8 V, high 2.4 V … 5 V, internal pull-up 10 kΩ connected to 5 V
- HLL: Low 0 V … 3 V, high 11 V … 24 V (up to 30 V are permissible), internal pull-up
10 kΩ connected to 24 V
-
Pulse duration: ≥ 5 µs
External Laser Switch-off, Optional
The external laser switch-off is implemented as a hardware solution and is a top priority.
The laser can also be switched off by software.
This function is offered by sensors with the /SI option.
Use a serial key switch in the control circuit to switch off the laser
With standard sensors, connecting the supply voltage activates the laser light source in
the sensor.
Wiring details are available in the operating instructions, Chap. 5.2.6.
