Yaskawa MP940 Reference Manual - Manual (Page 160)

Connection Method MotionSuite™ MP940 Machine Controller Reference Manual
5-18
RS422/485 Interface Cable
1. Make sure that the drive system, control system, power system, and
other transmission systems are separate from each other.
2. The MP940 interface module RS422/485 interface is an MR-8-pin
(CN3).
3. The RS422/485 cable length is 300m maximum. Use the minimum
length necessary.
4. The RS422/485 interface on the MP940 is non-insulated. Misoperation
may result due to noise in the connected terminal. In this case, reduce
the noise by using a shielded cable, modem, etc.
5. In the case of RS422, insert a terminal resistor as needed. Place the ter-
minal on the receiving side.
6. In the case of RS-485, attach a terminal resistor to both ends of the
transmission line.