Perle-systems 1700 Manual do Utilizador descarregar pdf (Página 96)

RS232 Null-Modem Cable Configuration

Figure D-9 RS232 Null-Modem Cable

The connecting cable must be a shielded cable.

This cable is needed when it is necessary to connect two units back-to-back and a

set of modems is not available. Note that this cable specifies DB25 connectors on

each end to allow direct connection to the link interface connector on each unit. The

link speed must be defined for each of the two units.

Shield

Signal Ground

DB25 MAL

DB25 MALE

Signal Ground

Shield

Transmitted Data

Received Data

Transmitted Data

Request To Send

Received Line Signal Detector (CD)

Data Set Ready

Received Line Signal Detector (CD)

DTE Ready

Transmit Timing DCE Source

Receiver Timing DCE Source

Transmit Timing DTE Source

Receiver Timing DCE Source

Transmit Timing DCE Source

Transmit Timing DTE Source

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Perle-systems 1700 Manual do Utilizador Página 96