Rj-45 Connector (Modular Jack) Specifications - Fuji Electric FRENIC-AQUA series User Manual

2.1.1

RJ-45 connector (modular jack) specifications

The table below lists the pin assignment of the RJ-45 connector (modular jack, designed for
keypad connection).
Pin No. Signal name
1, 8 Vcc
2, 7 GND
3 RES
6 NC
4 DX-
5 DX+
*1 For the details of the terminating resistor insertion switch, refer to Section 2.2.2 "Connection
notes, [2] "About terminating resistors."
- The RJ-45 connector has the pins connected to the keypad power supply (pins 1, 2, 3, 7
and 8). When connecting the inverter with a device such as other inverters via a
communications cable, take care not to connect the wiring of the device to those pins
assigned to the power supply. Connect nothing to pin 3.
- When the inverter is connected with the FVR-E11S series, a power short-circuit or a
collision of signal lines may occur, resulting in a damaged inverter. For details, refer to
Section 2.2.2 "Connection notes."
Failure may result.
2.1 Specifications of RS-485 Communications
Function
Power source for the keypad
Reference voltage level
Reserved
(Connect nothing to this pin.)
No connection
RS-485 communications data (-)
RS-485 communications data (+)
2-3
Remarks
5V
Ground (0 V)
−
−
A terminating resistor of 112Ω is
incorporated. Connection/cut off
is selected by a switch*1.