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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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