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Serial Port Interface
12/8/2010 ZP 450 User Guide P1031442-001
Serial Port Inter face
The maximum current available through the serial and/or parallel port is not to
exceed a total of 0.75 Amps.
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.
Interconnecting to DTE Devices — The printer is configured as data terminal
equipment (DTE). To connect the printer to other DTE devices (such as the serial
port of a personal computer), use an RS-232 null modem (crossover) cable. Figure
31 shows the required cable connections.
Interconnecting to DCE Devices — When the printer is connected via its RS-232
interface to data c ommunication eq uipment (DCE) su ch as a modem, a S TAN-
DARD RS-232 (straight- through) in terface ca ble must be used. Figur e 32 shows
the connections required for this cable.
Connecting to the KDU (Keyboar d Display Unit) — The KD U was designed for
DCE printer connectio ns and requires a Zebr a custom serial port g ender changing
adapter. The KDU now includes the KDU adapter and the Zebr a kit part number
for the KDU Adapter is 105934-088.
Pin Description
1Not used
2 RXD (receive data) input to the printer
3 TXD (transmit data) output from the printer
4 DTR (data terminal ready) output from the printer -- controls
when the host may send data
5 Chassis gr ound
6 DSR (data set ready) input to the printer
7 RTS (request to send) output from the printer -- always in the
ACTIVE condition when the printer is turned on
8 CTS (clear to send) - Not used by the printer
9 +5 V @ 0.75 A fused