YASKAWA E7LVD002 Technical Manual page 47

Terminating Resistor
The terminating resistance must be turned ON only if the Drive is at the very end of the Serial Communication chain. Set the
terminating resistance by turning ON DIP switch S1-1.
1. Separate the communication cables from the main circuit cables and control circuit wiring.
2. Use shielded cables for the communication wiring, and use proper shield clamps.
IMPORTANT
3. When using RS-485 communication, connect TB4-1 to TB4-3, and TB4-2 to TB4-4, on the control circuit
4. Connect shield at one end only.
Fig 2.9 Terminating Resistor
terminal board. See Fig 2.10 below.
TB4 on Control PCB A2
TB4-3
Fig 2.10 RS-485 Communication Connection
Electrical Installation 2 - 15
TB4-4 TB4-1 TB4-2