Communication Terminal Wiring - SHENZHEN ENCOM ELECTRIC TECHNOLOGIES CO. enc eds800-2s0002n User Manual

3.6.4 Communication terminal wiring

EDS800 inverter provides 485 serial communication interface for the user.
Following wiring methods make single-main single-sub control system or
single-main multi-sub control system possible. Using upper machine(PC or PLC
controller)software can realize real time supervision to inverter in the industrial
control system so that realize complicated run control such as long-distance control,
high automatization etc; you can also take one inverter as mainframe and the others
as submachine to form cascade or synchronous control network.
(1) When inverter 485 interface connected to other devices with 485 interface, you
can connect wire as below figure.
EDS800
485
(2) To connect remote control keypad, you can connect plug of remote control
keypad to RS485 directly. No need to set any parameter，inverter local keypad and
remote control keypad can work at one time.
(3) Connection between inverter RS485 interface and upper machine(with RS232
interface):
terminal name
Negative end B
Positive end A
(4)Multiple inverters can be connected together per RS485 and 31pcs inverter can be
connected together at most. Communication system is more prone to disturbance as
EDS800 series Service Manual
(485A)
(485B)
Fig.3-11 communication terminal wiring
RS232/RS485 converter
terminal
power supply
sending
receiving
grounding
name
B Negative end
A Positive end
Fig. 3-12 RS485 communication wiring
(485A)
(485B)
Shielded cable
name
+5V
TXD
RXD
GND
terminal
19
Device with
485 interface
signal Pin no.
shell
RXD 2
TXD 3
GND 5
DTR 4
DSR 6
RI 9
CD 1
RTS 7
CTS 8