RS-232 Serial Communications Port

Use a standard serial cable to connect to the host device via RS-232. The following diagram displays the pin diagram of the serial connector of the bottom panel of the Mobile Base.

Pin # Description

1Internal Jumper to Pin 6

2TXD

3RXD

4DSR

5GND

6DTR

7CTS

8RTS

95 VOLT OUT

Signals referenced are for a DTE device.

The Mobile Base connector is straight to the printed circuit board (PCB). The ninth pin sends 500mA at 5 Volts power out. This can power a peripheral device, such as a mobile printer, as long as that peripheral device can accept 500mA at 5 Volts.

14 - 4

Rev D

Dolphin® 7900 Series User’s Guide

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Hand Held Products 7900 manual TXD RXD DSR GND DTR CTS RTS Volt OUT, RS-232 Serial Communications Port