V&T E5 Series User Manual page 153

8. Communication Bus Topology
Bus topology of master and slave

Bus topology of master and slaves

With shielded twisted pair
Converter RST3T-485
RST3T
cable
GND
Maximum
T5 meters
Host computer T Master
140
E5 Series High Performance Universal Inverter
Appendix Figure3 Bus topology of master and slave
GND 485+ 485-
Slave No. T
Appendix Figure4 Bus topology of master and slaves
Appendix A Modbus Communication Protocol
User's Manual
GND 485+ 485-
The number of
slaves is limited
to a maximum
of 3T
Slave No. T
GND 485+ 485-
······
Slave No. n
T h e j um p er o f t er mi na l
resistor at the most distant
turn to ON side to start the
i ntern al T0 0Ω te rmina l
compatible resistance