Lexmark Forms Printer 2480 Technical Reference - Page 97
Serial Cable Pin Assignments (RS-232C), The following illustration shows the RS-232C serial cable
View all Lexmark Forms Printer 2480 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 97 highlights
Serial Cable Pin Assignments (RS-232C) The following illustration shows the RS-232C serial cable: 25-Pin Male 13 25 25-Pin D-shell Female 25 13 1 14 Serial Adapter Side 14 1 Computer Side RS-232C Serial Connector Pin Assignments Pin Signal Description 2 TXD (Transmit Data) This line transmits data from the printer to the host. The data characteristics are specified by the function menu settings which are read only during a Power On Reset (POR). The only data transmitted are XON (x'11') and XOFF (x'13') signals. Transmission occurs only when CTS is high. 3 RXD (Receive Data) This line receives data from the host. The serial interface accepts data only when DSR is On. 4 RTS (Request to Send) This line is set high and remains high even after the serial interface finishes its POR. 5 CTS (Clear to Send) This line is monitored only if the XON/XOFF protocol is selected because transmission occurs only when CTS is high. 6 DSR (Data Set Ready) DSR is another method of providing data integrity. Data is accepted only when DSR is high. 20 DTR This line is set high after the serial interface finishes its POR (Data Terminal Ready) sequence. However, if you select DTR pacing handshake protocol, this line is used to indicate to the host whether or not the printer is ready to receive any more data. 97 Section 6: Using the Printer Interface