Adeunis RF ARF33-PRO - Radio communication

32
208210A_UG_V1.6_ARFx3-PRO
Tde: set according to the value of the S219 register (see the table below).
S219 0 1 2 3 4 5 10 20 40 60 80
Tde
min
15 µs 35 µs 65 µs 135 µs 150 µs 190 µs 330 µs 600 µs 1.1 ms 1.7 ms 2.3 ms
In command mode, a response is sent (over the TXD line) according to the following DE/RE timing:
RXD
CMD
TXD
DE/RE
REPLY
≥700µs
≥100µs
≥100µs
The RS485 link needs to be adapted (on each side).
The modem includes a 100 W termination resistor:
• SW1.2=ON,theresistorisconnectedbetweenAandB(respectivelyRX+andRX-)
• SW1.2=OFF,theresistorisnotconnectedbetweenAandB.
If the modem is located at the end of the RS485 bus, SW1.1 must be set to ON.
100 
Rt
SW1.2
B
A
B’ / Z
A’ / Y
R
T
B / RX-
A / RX+
Z / TX-
Y / TX+
R
T
MODEM
Network termination 485
RS485 Network
ActivityontheseriallinkcausesthegreenLEDtoash,whetherthedatatransmissionratechoseniscorrector
not.
GB