Fuji Electric FRENIC-HVAC User Manual page 58

RS-485 communications port
Connector Name
DX+/DX- RS-485
/SD communications
port 2
(Terminal block)
RJ-45 RS-485
connector communications
for keypad port 1
connection (Standard RJ-45
connector)
CN10 USB port
CN11 Connector for
battery
Route the wiring of the control circuit terminals as far from the wiring of the main circuit
•
as possible. Otherwise electric noise may cause malfunctions.
Fix the control circuit wires with a cable tie inside the inverter to keep them away from the
•
live parts of the main circuit (such as the terminal block of the main circuit).
Functions
The communications port transmits data through the RS-485
multipoint protocol between the inverter and a computer or other
equipment such as a PLC (Programmable Logic Controller).
(For setting of the terminating resistor, refer to Section 2.3.2
"Setting up the slide switches.")
(1) Used to connect the inverter with the keypad. The inverter
supplies the power to the keypad through the pins specified
below. The extension cable for remote operation also uses
wires connected to these pins for supplying the keypad
power.
(2) Remove the keypad from the standard RJ-45 connector and
connect the RS-485 communications cable to control the
inverter through the PC or PLC (Programmable Logic
Controller). For setting of the terminating resistor, refer to
Section 2.3.2 "Setting up the slide switches."
Figure 2.10 RJ-45 Connector and its Pin Assignment*
* Pins 1, 2, 7, and 8 are exclusively assigned to power lines
for the keypad, so do not use those pins for any other
equipment.
A USB port connector (mini B) that connects an inverter to a
computer. FRENIC Loader running on the computer supports
editing the function codes, transferring them to the inverter,
verifying them, test-running an inverter and monitoring the
inverter running status.
A connector for an optional battery.
2-25
2.3 Terminal Specifications