Shenzhen
3onedata Technology Co., Ltd
3
2.2 Interface description
2.2.1
10/100Base-T(X) Ethernet port:
The 10/100BaseT(X) ports located on NP302 series front panel. The pin of RJ45 port display
as below. Connect by UTP or STP. The connect distance is not more than 100m. 100Mbps is used
100Ωof UTP , 10Mbps is used 100Ωof UTP 3,4,5.
RJ45 port support automatic MDI/MDI-X operation. It connects the PC, Server, Converter
and HUB by straight–though cable wiring. Pin 1, 2, 3, 6 Corresponding connection in MDI. 1→3,
2→6, 3→1, 6→2 are used as cross wiring in the MDI-X port of Converter and HUB. 10Base-T is
used in MDI/MDI-X, the definition of Pin in the table as below.
pin
MDI
signal
MDI-X
signal
1
TX+
RX+
2
TX-
RX-
3
RX+
TX+
6
RX-
TX-
4, 5, 7, 8 —
—
Note
：
“TX±” transmit data±, “RX±” receive data±, “—”not use
2.2.2 RS-232/485/422 Serial interface
RS-485/422 side is 5 bit terminal block. The PIN definition is as follows:
serial number
1
2
3
4
5
RS-422
T+(A)
T-(B)
GND
R+(A)
R-(B)
RS-485
D+
D-
GND
1
8
