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A signal cable connects the printer to other controllers or computers. The printer
does not come with a signal cable.
It is your responsibility to obtain, install, and maintain the signal cable. In addition, it
is your responsibility to ensure the cabling meets the applicable local, state, and
federal 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 additional
information on cabling requirements, refer to the
Guide to Operations
for the
computer to which you are attaching the printer.
Serial Attachment
The 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 adapter
card 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, with
transmission rates up to 38.4 Kbps.
RS-232C Connector Pin Assignments
Pin Number Signal Name Description
2 TXD Transmit Data
3 RXD Receive Data
4 RTS Request to Send
5 CTS Clear to Send
6 DSR Data Set Ready
7 SG Signal Ground
20 DTR Data Terminal Ready
RS-422A Connector Pin Assignments
Pin Number Signal Name Description
15 - RXD Receive Data
17 + RXD Receive Data
19 - TXD Transmit Data
25 + TXD Transmit Data
Attachment Cables for PCs and Compatible Serial Ports
The table below lists part numbers to use when ordering a cable.
Note: Before you place an order, IBM recommends you contact your IBM
marketing representativeto verify the current part number.
154 4247 Printer Model A00 User’s Guide