HMS Netbiter EasyConnect, Руководство пользователя

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Connections 9
Doc: HMSI-168-92 Rev: 3.10 Netbiter EasyConnect Gateway User Manual
2.2.2 RS-485 Serial Interface (3-pin Connector)
The RS ‐ 485 serial interface is used to connect Modbus RTU devices to the Netbiter EC220.
2.2.3 D-sub Connector
The 9 ‐ pin D ‐ sub connector provides connectivity for Modbus RTU slave units via RS ‐ 232
and for connecting a GPS receiver.
2.2.4 Antenna Connector
The antenna connector is a standard SMA screw connector. Optional external antennas are
available from your supplier.
Pin Function
A RS-485 A line
B RS-485 B line
COM RS-485 common
Pin Function
1 CD (Carrier Detect)
2 Rx (Receive)
3 Tx (Transmit)
4 DTR (Data Terminal Ready)
5 GND
6 DSR (Data Set Ready)
7 RTS (Request To Send)
8 CTS (Clear To Send)
9 RI (Ring Indicator)
3-pin connector