Yaskawa V1000-Series Option SI-EM3D/V Dual Port EtherNet Modbus TCP/IP Technical Manual - Manual (Page 18)

Option ground terminal
Figure 17 Connect the Ground Wire to the Option
14.
Connect the communication cable to the option modular connector (CN1) port 1.
To connect the option to a network, firmly connect RJ45 8-pin shielded twisted pair Cat5e cable(s) into the modular
connector ports (see Figure 18 ).
Communication Cable Specifications
Only use cable recommended for Modbus TCP/IP. Using a cable not specifically recommended may cause the option
or drive to malfunction.
The dual RJ45 network ports on the option board act as a switch to allow for flexibility in cabling topology. For example,
a traditional star network topology may be employed by using a single port on the option board. Alternatively, a daisy-
chained approach may be employed by using both RJ45 ports. The daisy-chained approach reduces the requirements
of central switch ports. A ring topology is also possible. When implementing a ring topology, Rapid Spanning Tree
Protocol (RSTP) must be enabled to function correctly.
Figure 18 Communication Cable Ports
STOP
(Hz) (Hz)
(A)
(V)
V1000
STOP
(Hz) (Hz)
(A)
(V)
V1000
STOP
(Hz) (Hz)
(A)
(V)
V1000
STOP
(Hz) (Hz)
(A)
(V)
V1000
STOP
(Hz) (Hz)
(A)
(V)
V1000
STOP
(Hz) (Hz)
(A)
(V)
V1000
STOP
(Hz) (Hz)
(A)
(V)
V1000
STOP
(Hz) (Hz)
(A)
(V)
V1000
STOP
(Hz) (Hz)
(A)
(V)
V1000
Star Topology Daisy-Chained Topology Ring Topology
Figure 19 Topology Options
5 Installation Procedure
18 YASKAWA SIEP YAICOM 17A V1000 Option Dual-Port Modbus TCP/IP SI-EM3D/V Technical Manual