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13 - 8 Rev A
5/15/07
Dolphin® 9500 Series User’s Guide
RS-232 Pin Configuration
Refer to this table if you want to make your own cables. To do so, you must determine if your host RS-232 device is
9-pin or 25-pin and
configured as a DCE or DTE device.
Mobile Base Serial Connector
The following diagram displays the pin diagram of the serial connector of the bottom panel of the Mobile Base.
Note: 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 5V power out. This can
power a peripheral device, such as a mobile printer, as long as that peripheral device can accept 500mA at 5V.
Mobile Base /Host Port
(DCE)
IBM AT DB9
(DTE)
IBM XT DB25
(DTE)
Modem DB25
(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
Pin # Description
1 Internal Jumper to Pin 6
2TXD
3RXD
4DSR
5GND
6 DTR
7 CTS
8RTS
9 5 VOLT OUT