A signal cable connects the printer to other controllers or computers. The printerdoes not come with a signal cable.It is your responsibility to obtain, install, and maintain the signal cable. In addition, itis your responsibility to ensure the cabling meets the applicable local, state, andfederal building codes. The cables are available in bulk sizes or in precut lengths.You can purchase components or preassembled cables from IBM.Use the information on the following pages to order the correct cable. For additionalinformation on cabling requirements, refer to theGuide to Operations for thecomputer to which you are attaching the printer.Serial AttachmentThe 4247 Printer attaches to a host or controller by one of two serial interfaces,RS-232C or RS-422A. A single, 25-pin D-connector mounted directly on the adaptercard allows attachment to either interface.The RS-232C interface uses a standard serial cable up to 15.2 m (50 ft) in length,with transmission rates up to 19.2 Kbps.The RS-422A interface uses a serial cable up to 1219 m (4,000 ft) in length, withtransmission rates up to 38.4 Kbps.RS-232C Connector Pin AssignmentsPin Number Signal Name Description2 TXD Transmit Data3 RXD Receive Data4 RTS Request to Send5 CTS Clear to Send6 DSR Data Set Ready7 SG Signal Ground20 DTR Data Terminal ReadyRS-422A Connector Pin AssignmentsPin Number Signal Name Description15 - RXD Receive Data17 + RXD Receive Data19 - TXD Transmit Data25 + TXD Transmit DataAttachment Cables for PCs and Compatible Serial PortsThe table below lists part numbers to use when ordering a cable.Note: Before you place an order, IBM recommends you contact your IBMmarketing representativeto verify the current part number.154 4247 Printer Model A00 User’s Guide
