Serial Rs485 Communication Connector - Toshiba TOSVERT VF-P7 Instruction Manual

2.3.3 Serial RS485 communication connector

■Figure of serial RS485 communication connector
To use the serial RS485 connector, detach the cover
for serial RS485 connector.
Signal name Pin number
RXA
RXB
TXA
TXB
SG
This table shows signal line of inverter side.
(Example: RXA signal is received by inverter.)
※Never use pin-1(24Vdc) and pin-7(5Vdc).
■Connecting diagrams for RS485 communication
Upper computer
or VF-P7(master)
RXA
RXB
TXA
TXB
SG
■Note
※ Please detach a communication line and the main circuit wiring 20cm or more.
※ Please do not connect pin-1(24Vdc) and pin-7(5Vdc).
※ Please twist the lines between RXA and RXB, between TXA and TXB by the twist pair cable.
※ Please connect terminus resistance at the terminal (both ends) of a transmission way.
※ When you use it by 2 line type, please short-circuit between RXB and TXB, between RXA and TXA.
※ Master side reception(pin-4,pin-5) / slave side transmitting(pin-3,pin-6) lines may not connect at the time
of communication between inverters.
4
Same phase reception data(positive line)
5
Anti-phase reception data(positive line)
3
Same phase transmitting data(positive line)
6
Anti-phase transmitting data(positive line)
2,8
Ground line of signal data
cross each other
VF-P7(slave)
RXA
RXB
TXA
TXB
SG
B-11
Pin-8
content
straight
VF-P7(slave)
RXA
RXB
TXA
TXB
SG
Pin-1
straight
VF-P7(slave)
RXA
RXB
TXA
TXB
SG
Terminal resistor
120Ω-1/2W