Vision Systems VPNRouter iR 2110, Руководство пользователя

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5 Position of Connectors and Functions of VPNRouter iR 2110
Pin RS232 RS422 RS485 2-wire
1 DCD Tx- (A) Data- (A)
2 RxD Tx+ (B) Data+ (B)
3 TxD Rx+ (B)
4 DTR Rx- (A)
5 GND GND GND
6 DSR
7 RTS
8 CTS
9 RI
Table 12: Serial DSub-9 Pinout
Figure 29: COM Port
Please note the function of the GND signal in RS422 and RS485 modes: this signal must also be
connected between the serial devices. So in reality a 2-wire and a 4-wire connection need 3 wire
and 5 wire respectively. With the exception of very special congurations, a serial connection in
RS422/RS485 mode without GND connection violates the specications for RS422 and RS485
standards.
In RS232 and RS422 Mode data may be received while transmitting. This also applies to RS485
Full Duplex Mode, which is also referred to as 4-wire connection (same signal assignment as the RS
422).
The RS485 Standard Mode is alternatively referred to as Half Duplex Mode, 2-wire connection
or Bus Mode. It uses the same two wires for transmit and receive. So it would be possible to
simultaneously receive the same data the port just transmitted, this is often named an Echo. The
serial port in VPNRouter intentionally suppresses this Echo. In the rare situations where this Echo
is required, the port should be set as this:
ˆ Congure the port for RS485 Full Duplex Mode
ˆ Connect Tx+ with Rx+ in the cable
ˆ Connect Tx- with Rx- in the cable
5.9. LAN
The LAN Ethernet port in VPNRouter is for 10/100 Mbps Fast
Ethernet. When the connect is done the Link LED on RJ45 (right)
will light. When data trac occurs on the network, this LED will
blink. It depends on your network or devices whether a 100 Mbit
or a 10 Mbit connect will be established. The Speed LED (left)
lights for 100Mbps connections.
Figure 30: LAN Port
Juli 2016 VPNRouter Software Manual 25