Figure 28: RS485 terminal block on the communication board
4. Loosen the screws of pins A(+), B(-), and G on the left of the RS485 terminal block
(RS485-1 ).
Figure 29: RS485 terminal block
5. Insert the wire ends into the G, A and B pins shown above. Use Four- or six-wire
twisted pair cable for this connection.
You can use any color wire for each of the A, B and G connections, as long as:
The same color wire is used for all A pins the same color for all B pins and the
same color for all G pins
The wire for G is not from the same twisted pair as A or B.
6. For creating an RS485 bus - connect all B, A and G pins in all inverters. The following
figure shows this connection schema:
Single Phase Inverter with HD-Wave Technology Installation MAN-01-00541-1.4
58
Creating an RS485 Bus Connection
Summary of Contents for UL1741-SA
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