3.6.Connecting to networks via RS-232/485 interface
Note that this chapter is applicable only if the optional “Serial ports” kit has been purchased with the device.
The kit comprises of three serial ports, described in the table below:
|
Port name |
Port type |
Connection |
|
COM1 |
RS-232 |
EIA/TIA-561 |
|
COM2 |
RS-232 |
Proprietary |
|
RS-485 |
RS-485 |
Proprietary |
All these three serial ports are located in the “Port 1” of the device (physically RJ-45 Ethernet port). The connection scheme of the “Port 1” is as follows:
|
RJ-45 Pin |
Pin name |
Description |
|
1 |
GND |
Signal Ground |
|
2 |
RxD |
COM 2 Receive pin |
|
3 |
TxD |
COM 2 Transmit pin |
|
4 |
GND |
Signal Ground |
|
5 |
RxD |
COM 1 Receive pin |
|
6 |
TxD |
COM 1 Transmit pin |
|
7 |
A |
RS-485 A also denoted as (-) |
|
8 |
B |
RS-485 B also denoted as (+) |