Hardware Control Signal Descriptions
For all RS-232 input and output signals, this printer follows 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 will have 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.
Zebra Z4M Printer User’s Guide 87
