Zebra Technologies GC420t manual Serial Port Interface, Connecting the Printer to a DCE Device

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Serial Port Interface

Serial Port Interface

Pin Description

1Not used

2RXD (receive data) input to the printer

3TXD (transmit data) output from the printer

4DTR (data terminal ready) output from the printer -- controls when the host may send data

5Chassis ground

6DSR (data set ready) input to the printer

7RTS (request to send) output from the printer -- always in the ACTIVE condition when the printer is turned on

8CTS (clear to send) - Not used by the printer

9+5 V @ 0.75 A fused

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 DCE Devices — When the printer is connected via its RS-232 interface to data communication equipment (DCE) such as a modem, a STAN- DARD RS-232 (straight-through) interface cable must be used. Figure 32 shows the connections required for this cable.

Connecting to the KDU (Keyboard Display Unit) — The KDU was designed for DCE printer connections and requires a Zebra custom serial port gender changing adapter. The KDU now includes the KDU adapter and the Zebra kit part number for the KDU Adapter is 105934-088.

Connecting the Printer to a DCE Device

DB-9P

DB-25S

DB-9P

DB-9S

Connector

Connector

Connector

Connector

to DCE Device

to Printer

to DCE Device

to Printer

P1052686-001

GC420t™ User Guide

5/22/2012

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Contents Zebra GC420t P1052686-001 GC420t User Guide 22/2012 Iii FCC Compliance Statement Contents About This DocumentWho Should Use This Document How This Document Is OrganizedContacts Mail Back Technical LibraryDocument Conventions Icons UsedContents Print Operations Appendix Dimensions P1052686-001 GC420t User Guide 22/2012 Introduction GC420t Thermal Printers What’s in the Box? Unpack and Inspect the PrinterYour Printer Opening the printerPrinter Features Operator Controls Power Switch Feed Button Status LightClosing the printer Contents Getting StartedAttaching Power Loading Roll Media Preparing MediaPlacing the Roll in the Media Compartment Loading Roll Media Guides Loading Transfer Ribbon Loading Transfer Ribbon Loading Transfer Ribbon Loading Transfer Ribbon Printing a Test Printer Configuration Label Pre-install Windows Printer Drivers Universal Serial Bus USB Device Communications Serial Port and Windows operating systemsConnecting your Printer to a Computer Interface Cable RequirementsUSB Interface Requirements Serial Communications AutobaudEPL Y Command Parallel Port Testing Communications by Printing After Your Printer is ConnectedAfter Your Printer is Connected Print Operations Long Term Printer In-activity or Storage Determining Printer ConfigurationThermal Printing Modes of Printing Print Media TypesTypes of Media Roll and Fanfold Media Determining Thermal Media Types Replacing SuppliesAdding a New Transfer Ribbon Adjusting the Print Quality Adjusting the Print WidthReplacing a Partially Used Transfer Ribbon Media Sensing Ribbon Overview When to Use RibbonCoated Side of Ribbon Ribbon Test with Adhesive Ribbon Scratch TestPrinting on Fan-Fold Media Printing on Fan-Fold Media Printing with Externally Mounted Roll Media Externally Mounted Roll Media ConsiderationsFonts and Your Printer Localizing the Printer with Code PagesIdentifying Fonts in Your Printer ZPL FontsStand Alone Printing Sending Files to the Printer Print Meter Printer Options Label Dispenser Option XA MMP XZLabel Dispenser Option Label Dispenser Option Zebra KDU Printer Accessory KDU Plus Printer Accessory ZBI 2.0 Zebra Basic Interpreter ZBI 2.0 Zebra Basic Interpreter Maintenance Cleaning See Cleaning the Printhead onCleaning the Printhead Media Path Considerations Sensor Cleaning Platen Cleaning and Replacement Maintenance Other Printer Maintenance Replacing the Printhead Maintenance Unplug both bundles of printhead wires from their connectors Maintenance Troubleshooting Status Light Descriptions Status Light Error Resolutions Ribbon is out Printhead is over temperatureMedia is out Printhead is openNo print on the label Print Quality ProblemsPrinted image does not look right Print Quality Problems Is the printer in pause mode? If so, press the Feed button Manual Calibration Printing a Configuration Label Troubleshooting TestsRecalibration Resetting the Factory Default Values Communications DiagnosticsCommunications Diagnostics Feed Button Modes Flash Sequence ActionPower On Modes Feed Button Modes Appendix Interface Wiring Universal Serial Bus USB Interface Parallel Interface HostConnecting the Printer to a DCE Device Serial Port InterfaceAppendix Dimensions External GC420t Printer Dimensions Optional Label Dispenser External GC420t Printer Dimensions Appendix ZPL Configuration Managing the ZPL Printer Configuration ZPL Printer Configuration FormatZPL Configuration Status to Command Cross-reference Configuration Label PrintoutDefault 65536k.......B only displays this if installed Printer Memory Management and Related Status Reports ZPL Programming for Memory Management~WC Printer Memory Management and Related Status Reports