Hand-held-products Dolphin 7200 User Manual Page 70

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9 - 8 Dolphin® 7200 User’s Guide
Setting Up for Communications
The Dolphin terminal and Dolphin Compact HomeBase support RS-232 communications through the RS-232 Main
Communications Port on the back of the Dolphin 7200 Compact HomeBase. The HomeBase translates the RS-232 signals from
the host computer into infrared signals to communicate with the Dolphin terminal.
The HomeBase RS-232 interface allows the Dolphin terminal to communicate to a personal computer, modem, or any standard
RS-232 device using a standard serial cable and communications software.
Follow these steps to set up the Dolphin HomeBase and Dolphin terminal for communications:
1. Set up the Dolphin Compact HomeBase.
2. Set-up the Dolphin terminal.
3. Follow the data transfer sequence as described by your application.
Setting up the Dolphin Compact HomeBase
Set the Dolphin Compact HomeBase on any dry, stable surface such as a desktop. Before mounting the Compact HomeBase,
check to ensure that all AC wall transformers have a nearby electrical outlet. Be sure to provide enough workspace with good
lighting for the user to view and operate the Dolphin terminal while it is in the HomeBase.
Connecting the Cables
Connect the Compact HomeBase to the host computer or other device by plugging an RS-232 serial cable into the RS-232
Communications Port on the rear of the HomeBase. The wiring of your cable depends on whether the other device is set up as
a Data Communications Equipment (DCE) or Data Terminal Equipment (DTE) device.
The HomeBase RS-232 Port is configured as a DCE device. To communicate with a DTE device such as a computer, use a
standard (or straight-through) RS-232 cable. To communicate with a DCE device, use either a null modem adapter in line with a
standard RS-232 cable, or a null-modem serial cable.
You can make your own cables by following the pin configuration in the chart below. To do so, you must determine if your host
RS-232 device is 9-pin or 25-pin, and whether it is configured as a DCE or DTE device.
With the Dolphin 7200 Compact HomeBase, connect each device to the RS-232 Communications Port on the back of the
HomeBase. The Compact HomeBase cannot be networked.
Connect the power supply to the Compact HomeBase. Plug the AC transformer into the Dolphin HomeBase 12 Volt DC power
supply connector. The AC wall transformer provided can power only one Dolphin Compact HomeBase.
Hand Held Products recommends that you leave the Dolphin Compact HomeBase connected to its power source at all times, so
that it is always ready to use.
Pin Configuration
HomeBase /Host Port (DCE) IBM AT DB9 (DTE) IBM XT DB25 (DTE) Modem DB25 (DCE)
2 (RD) 2 3 2
3 (TD) 3 2 3
5 (SG) 5 7 7
4 (DTR) 4 20 6
6 (DSR) 6 6 20
7 (RTS) 7 4 5
8 (CTS) 8 5 4
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