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USB device communication
The inverter can be connected to a personal computer with a USB (ver. 1.1) cable.
Interface
Conforms to USB 1.1
Transmission speed
12 Mbps
Wiring length
Maximum 5 m
Connector
USB mini B connector (receptacle)
Power supply
Self-powered
2.7.3
RS-485 terminal block
Connecting between the RS-485 terminals of the master/slave inverters enables communication for the parallel operation.
Refer to
page 68
for the wiring.
RS-485 terminal layout
Terminating resistor switch
Initially-set to "OPEN".
Set only the terminating resistor switch of
the remotest inverter to the "100Ω" position.
VCC
GND
TXD1+
TXD1-
OPEN
VCC GND
+ TXD
-
100Ω
VCC GND
+ TXD
-
VCC
GND
TXD2+
TXD2-
Name
RXD1+
Inverter receive+
RXD1-
Inverter receive-
RXD2+
Inverter receive + (for branch)
RXD2-
Inverter receive - (for branch)
TXD1+
Inverter send+
TXD1-
Inverter send-
TXD2+
Inverter send + (for branch)
TXD2-
Inverter send - (for branch)
5 V
VCC
(permissible load current 100 mA)
Earthing (grounding) (connected to
GND
terminal SD)
Connection of RS-485 terminals and wires
• Use a 4-pair twisted cable for each connection.
• The size of RS-485 terminal block is the same as that of the control circuit terminal block. Refer to
method.
NOTE
• The wiring length should be 5 m maximum between the RS-485 terminals.
• To avoid malfunction, keep the RS-485 terminal wires away from the control circuit board.
• For wiring of the RS-485 terminals used with a plug-in option, lead the wires on the left side of the plug-in option.
RXD1+
RXD1-
+
RXD
-
+
RXD
-
RXD2+
RXD2-
Description
page 55
2. INSTALLATION AND WIRING
2.7 Communication connectors and terminals
1
2
3
4
5
6
7
8
9
10
for the wiring
67
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