Zebra Technologies GX420D, GX430D manual Serial Port Interface, 103

Serial Port Interface

Serial Port Interface

103

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 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 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.

8/4/10 GX420d™ / GX430d™ User Guide 980611-001 Rev. C