Printronix L5035 user manual RS-422 Serial Interface Signals

RS-422 Serial Interface

RS-422 Serial Interface Signals

The RS-422 serial interface signals are defined below.

Received Data (RxD) - Serial data stream from the host to the printer.

Transmitted Data (TxD) - Serial data stream from the printer to the host. Subject to protocol selection.

Request To Send (RTS) - Control signal from the printer to request permission to send data to the host. Subject to configuration.

Clear To Send (CTS) - Status signal to the printer indicating the host is ready to receive data/status signals from the printer. When CTS is enabled, DSR and CTS must both be asserted for the printer to transmit flow control characters to the host.

Data Set Ready (DSR) / Clock B - Status signal to the printer indicating the host is in a ready condition. DSR is ignored unless CTS is enabled.

Data Terminal Ready (DTR) - Control signal from the printer to the host. When enabled, the host will activate the data channel. Subject to configuration.

Clock Signal B - External timing for signals on data channel B.

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