Hand Held Products 7400/7450 manual Setting the Baud Rate, Connecting the Cables

Connecting the Cables

Connect the Mobile IntelliBase/Mobile Base 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 cradle. Plug the other end of the RS-232 serial cable into the correct port on the host RS-232 device.

The wiring of your cable depends on whether the other device is set up as a DCE (Data Communications Equipment) or DTE (Data Terminal Equipment) device.

The Mobile IntelliBase/Mobile Base Communication 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.

HomeBase /Host		IBM AT DB9	IBM XT	Modem DB25
Port (DCE)		(DTE)	DB25 (DTE)	(DCE)
Pin / Input Signal
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

Supplying Power to the Dolphin Mobile IntelliBase and Mobile Base

The Mobile IntelliBase and Mobile Base can both be powered from either a 12 -48 volt DC source. Power is connected to the input power connector located on the rear of the Mobile IntellieBase.

HHP recommends that you leave the Mobile IntelliBase connected to its power source at all times, so that it is always ready to use.

Setting the Baud Rate

After connecting the cables and supplying power to the Mobile IntelliBase, set the baud rate switch. Refer to the Baud Rate Tables earlier in this section for guidance on setting the switch.

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