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Zebra Z4M/Z6M Printers User’s Guide 89
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For all RS-232 input and output signals, the Z4M and Z6M printers follow both the
Electronics Industries Association (EIA) RS-232 and the Consultative Committee for
International Telegraph and Telephone (CCITT) V.24 standard signal level
specifications.
When DTR/DSR handshaking is selected, the Data Terminal Ready (DTR) control
signal output from the printer controls when the host computer may send data. DTR
ACTIVE (positive voltage) permits the host to send data. When the printer places
DTR in the INACTIVE (negative voltage) state, the host must not send data.
NOTE: When XON/XOFF handshaking is selected, data flow is controlled by
the ASCII Control Codes DC1 (XON) and DC3 (XOFF). The DTR Control
lead has no effect.
Request to send (RTS) is a control signal from the printer that is connected to the clear
to send (CTS) input at the host computer. RTS is always ACTIVE (positive voltage)
when the printer is on.
CAUTION: This printer complies with FCC “Rules and Regulations”,
Part 15 for Class B Equipment, using fully shielded six-foot data cables.
Use of longer cables or unshielded cables may increase radiated emissions
above the Class B limits.