Siemens DTU3005-B Dokumentacja Pobierz pdf (Strona 46)

Serial Communication

RS-232 and RS-485 are Electronic Industries Association (EIA)

specifications commonly used for serial data communication.

Siemens ACCESS devices support the RS-485 as standard.

Some ACCESS devices also support the RS-232 standard.

RS-232 RS-232 is a serial communication protocol which sends and

receives information through twisted pair cable. It is common to

see both 9-pin and 25-pin RS-232 connectors. It is important to

note that although the RS-232 standard consists of 25

transmission lines, many applications do not require all the lines

available. Depending on the device, manufacturers use various

combinations of the transmission lines available. The following

illustration, for example, shows the connector requirements for

equipment used in the Siemens ACCESS system.

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 87 88

Brak uwag

Siemens DTU3005-B Dokumentacja Strona 46