User's Manual

QL 420 User’s Guide 21
Cable Communications
CAUTION. The power should be turned off before
connecting or disconnecting the communications cable.
All QL 420 printers can communicate by cable; the specific ca-
ble supplied with your printer will vary with the host terminal. The
8- pin circular connector on your communications cable plugs
into the serial communications port on the side of the QL 420
printer, which is protected by a weather resistant flap. The con-
nector is keyed to assure correct alignment; do not try to force
the cable if it does not plug in. The other end of the cable must
be plugged into the host terminal as shown in Figure 11, or to a
serial port on a computer (Figure 12.) Communications between
the terminal and the printer are controlled by the applications
running on the terminal and the printer.
FIGURE 12: COMMUNICATIONS WITH A P.C.
Communications Cable to Terminal
Part number varies. Refer to Appendix A.
QL 420
Communications
Port
FIGURE 11: CABLE COMMUNICATIONS
Serial Communications Cable to
Computer
Refer to Appendix A for part numbers.