Option ground terminalFigure 17 Connect the Ground Wire to the Option14. 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 pairCat5e cable(s) into the modular connector ports (see Figure 18).Communication Cable SpecificationsOnly use cable recommended for Modbus TCP/IP. Using a cable not specificallyrecommended may cause the option or drive to malfunction.The dual RJ45 network ports on the option board act as a switch to allow for flexibilityin cabling topology. For example, a traditional star network topology may be employedby using a single port on the option board. Alternatively, a daisy-chained approachmay be employed by using both RJ45 ports. The daisy-chained approach reducesthe requirements of central switch ports. A ring topology is also possible. Whenimplementing a ring topology, Rapid Spanning Tree Protocol (RSTP) must be enabledto function correctly.5 Installation Procedure26 YASKAWA TOEP YAICOM 17B V1000 Option Dual-Port Modbus TCP/IP SI-EM3D/V Installation Manual