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6.2.2 Connection Serial Interface RS422 / RS485
The following interfaces are available:
- COM 2,3,4,5 as RS422 interface.
- COM 1 selectable between RS422 (full-duplex) und RS485 (half-duplex).
The baud rate setting of the interfaces takes place via DIP switches 7 and 8 on the rear
panel (refer to settings chapter 7.5). The setting applies to all interfaces.
Default setting 4800 baud
The following interface specification is permanently set for the outputs (8N1):
8 data bit
NO parity
1 stop bit
A special interface specification is not necessary for the inputs, which may have the following
interface specification:
• COM1: 8N1, 7E1
• COM2 + COM3: 8N1
6.2.2.1 COM 1 and COM 1’
• For wind transmitters with serial data transfer (Ultrasonic- Anemometer 4.38xx...., Wind
Direction Transmitter First Class 4.3150.x0.400) and other external Winddisplay LED’s
(Slaves).
The connection is established via clamp connectors „COM1“ / „COM1’ “. The two clamp
connectors of the interface are connected in parallel.
Des.
Clamp connector:
Clamp connector:
transmitter (receiver) transmitter (receiver)
TX+(RX+)
GND ground ground
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