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REMOTE COMMUNICATION

B - REMOTE COMMUNICATION

11.2 APPENDIX B: REMOTE COMMUNICATION

The RSi S4 drive provides a serial link to support remote communication. The serial link supports ASCII or

RTU communication utilizing Modbus protocol. Modbus (I/O 46, 47, 48 and 49) are supported by the RSi

S4 drive.

The communication interface is RS-485, and allows up to 247 slaves to be connected to one master (with

repeaters when the number of drops exceeds 31). Please refer to the gure below for connection diagrams.

The gure below shows the pinout for the RJ45 connector on the bottom of the Terminal Strip Processor

Card. An RJ45 male connector may be attached here to connect the RSi S4 drive to a ModBUS-485

Network.

If the drive is the end of a cable, a 120Ω, 1/4W resistor may be required.

Figure 38: RS-485 pin connections

Figure 37: RJ45 Connector

S4 RS-485 Connector (Modbus) Pin-out

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