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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
4. Connect shield at one end only.
Fig 1.4 Terminating Resistor
circuit terminal board. See Fig 1.5 below.
TB4 on Control PCB A2
TB4-3
TB4-4
Fig 1.5 RS-485 Communication Connection
TB4-1
TB4-2
Yaskawa Electric America, Inc.
Installation Guide IG.E7B.02 Rev: 04-11
Date: 11-1-04 Page 9 of 46
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