Chapter 4 Wiring and Introduction
EMSD5 AC Servo Manual
32
GND
7
GND
7
PE
（
shielded layer
）
Cover
PE
（
shielded layer
）
Cover
2. RS485 Communication Parallel Connection Of Multi Drives
When using 485 communication network, the parallel connection of multi drives is as
follows:
A
B
Fig.4-14 Parallel Cable Diagram Of Multi Drives
Table 4-3 Connection Between Multi Drives
Drive RJ45( A end)
PLC
（
B end
）
Signal Name
Pin No.
Signal Name
Pin No.
RS485+
5
RS485+
5
RS485-
4
RS485-
4
GND
7
GND
7
PE
（
shielded layer
）
Cover
PE
（
shielded layer
）
Cover
3.
RS485 Communication Grounding Precaution
When using RS485 communication, the GND terminal of the upper device is connected with the
GND terminal of the servo drive as shown in the following picture:
Fig.4-15 RS485 Communication Diagram
