4
MA00101E00 V_1.3
The serial line present on OPDE / MiniOPDE drives has connection capability for “4-wire” data transmission
and therefore it can communicate in full-duplex mode. As a fact, by virtue of the protocol used
(MODBUS RTU), it always communicates in “half-duplex” mode, wherefore you can make the connection
with just “two wires” by connecting RX and TX and /RX and /TX between them.
In connector J1 (OPDE) / J3 (MiniOPDE), RX and /RX signals are the reception signals for the drive, while
TX and /TX are the transmission signals.
Impedances are fitted inside the drive to “terminate” the connection (120Ω) and polarize the line. To use this
terminal, connect between them terminals 5 - 3 and 9 - 7 of connector J1 (OPDE) / J3 (MiniOPDE) (
for the
last drive in the line only
).
Communication wires must be twisted.
4 LED DESCRIPTIONS
LED
Descriptions
L1
RX-RS232
L2
TX-RS232 (option “MONITOR”=RX-USB)
L3
RX-USB
L4
TX-USB
L5
RX-RS422/RS485
L6
ENABLE TX-RS422/RS485
L7
TX-RS422/RS485
L8
POWER SU5VExt
5 DIPSWITCH DESCRIPTIONS
Correct
setting
