Ohaus RS422 Interface Option Kit Manual multi User Manual
Page 44

IT-2 Kit opzionale RS485 / RS422
2.2 Guida cablaggio RS485 / RS422
• Non far passare più di un cavo attraverso la boccola pressacavo.
• Non utilizzare il cavo che si connette alle schede RS485//RS422 per effettuare
altre connessioni.
• Si consiglia l’utilizzo di un cavo elettrico bipolare.
• La boccola pressacavo supporta un cavo del diametro oscillante da 2 mm a 6
mm (0,08 – 0,23 pollici).
•
Le connessioni dei terminali sulle RS485//RS422 consentono una dimensione
dei cavi che va da 0,14 a 1,5 mm
2
(da 26 a 16 AWG). Le estremità dei fili
arrivano fino a 6 mm (0,25 pollici).
Figura 2.1. Preparazione del cavo.
• Collegare i cavi al blocco terminale J2 come da figura 2.2.
Operating Mode
Jumper location
Receive - (RXD
-
)
Receive + (RXD +)
Ground (GND)
Transmit - (TXD
-
)
Transmit + (TXD +)
Termination Resistance
Jumper location
W1 W2
J1
J4
J2
Figura 2.2 Connessioni RS485
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