YASKAWA iQpump Micro CIMR-PW Series User Manual page 388

C.4 Connecting to a Network
u Wiring Diagram for Multiple Connections
Figure C.3 and Figure C.4
RS-485 Interface
n
Note:
The isolated ground (IG) connection is optional but strongly recommended to improve network immunity to electrical interference.
<1> The
Connect the shield to ground at the controller side only if common mode noise issues are suspected.
<2> The IG terminal is the signal common point for the RS-485 transceiver chip power supply.
Connect the isolated ground IG between all nodes to help prevent the coupling of external noise
to the bus and to limit bus emissions if desired.
Note: 1. Set DIP switch S2 to the ON position on the drive located at the end of the network. Set DIP switch S2 to the OFF positions on all other
slave devices.
2. Set H5-07 to 1 when using the RS-485 interface.
388
explain the wiring diagrams for multiple connections using MEMOBUS/Modbus communication.
R–
R+
S–
Controller
S+
IG
<2>
<1>
Ground symbol represents a direct electrical connection to the Earth.
Figure C.3 RS-485 Interface
S–
Drive
S+
R–
S2
R+
IG
OFF
<2>
<1>
S– Drive
S+
R–
S2
R+
IG
OFF
<2>
<1>
S–
Drive
S+
R–
S2
R+
ON
IG
<2>
<1>
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual