Hand Held Products 7200/UG - Manual (Page 101)

C H A P T E R 7 U S I N G T H E D O L P H I N 7 2 0 0 H O M E B A S E
101 101 101 101
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 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.
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
Figure 16 Pin Configuration
With the Dolphin 7200 HomeBase, use the appropriate cable to connect each device
to the Main Comm Port for a single Dolphin HomeBase or to the Multi-HomeBase
Port if you are creating a Dolphin HomeBase network.
Connect the power supply to the Dolphin 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 HomeBase.
Hand Held Products recommends that you leave the Dolphin HomeBase connected
to its power source at all times, so that it is always ready to use.
Setting the Configuration Switches
Use these switches to select the network and communications modes for your
Dolphin HomeBase. If you are configuring the HomeBase for a single Dolphin
Terminal, the switch must be in the ‘Single’ position for proper basic operation. The
switch must be set to ‘Multi’ for proper network operation if you are creating a
HomeBase network. The configuration switch must be in the program position to
change the baud rate.