B+B SmartWorx THINQ1 Manuale Utente

Locating serial and network ports 

Serial port(s) 

SDS serial ports connect via cables to your serial device(s). The 

number of these ports will vary depending on the SDS model. All SDS 

models come with DB-9 serial port connectors. RS-232 “M” models 
include adapter plugs to convert the DB-9 connectors to RJ-45 

connectors. See Making connections on page 13 for directions on 

connecting an SDS serial port to a serial device. 

 

The following figures and tables show the serial port pinouts for RS-

232 and RS-232/422/485 applications. 

Figure 3 - DB-9 pinouts 

 

Table 3 - RS-232 signals on DB-9 connector 

RS-232 signal description 

DB-9 

Data Carrier Detect (DCD) 

1 

Receive Data (RxD) 

2 

Transmit Data (TxD) 

3 

Data Terminal Ready (DTR) 

4 

Signal Ground (GND) 

5 

Data Set Ready (DSR) 

6 

Request To Send (RTS) 

7 

Clear To Send (CTS) 

8 

Ring Indicator (RI) 

9 

Table 4 - RS-422/485 signals on DB-9 connector 

RS-422/485 signal description 
four-wire mode 

DB-9  RS-422/485 signal description 

two-wire mode 

Auxiliary Input (AuxIn–) 

1 

NC 

Receive Data (RxD+) 

2 

NC 

Transmit Data (TxD+) 

3 

Transmit/Receive Data (Data+) 

Auxiliary Output (AuxOut–) 

4 

NC 

Signal Ground (GND) 

5 

Signal Ground (GND) 

Receive Data (RxD–) 

6 

NC

 

Auxiliary Output (AuxOut+) 

7 

NC

 

Auxiliary Input (AuxIn+) 

8 

NC

 

Transmit Data (TxD–) 

9 

Transmit/Receive Data (Data–)