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Dolphin® 7900 Series Mobile Computer User’s Guide 3 - 9
Bottom Panel Features
Mechanical Connector
The bottom panel of the Dolphin 7900 features a custom, industrial-grade connector with 17 pins. When seated in a Dolphin 7900
series peripheral, the terminal is powered, the main battery charged, and communication occurs via this connector. All Dolphin
7900 Series peripherals are designed to work exclusively with this connector.
The 17-pin connector communicates with Dolphin 7900 Series peripherals via RS-232 or USB. For RS-232, the maximum
communication speed is 115 Kbps with seven baud rate settings. For USB, the communication speed is up to 12 Mbps. If the
peripheral unit is connected to a PC, this connector also transmits data.
Powering Out
The mechanical connector also provides power out (to peripheral devices) 5V at 500mA. This means that, with the proper Hand
Held Products’ cable, the terminal can power another device. By default, power out is disabled. To enable power out, alter the
registry as follows:
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\Serial4]
Conn5Venable=1
Pin # Description
1 +USB
2 PWR
3 N / C
4 N / C
5 N / C
6 N / C
7 GND
8 5V OUT
9 DTR
10 -USB
11 USB DET
12 RI
13 DSR
14 RXD
15 RTS
16 TXD
17 CTS
1
10
2
11
3
12
4
13
5
14
6
15
7
16
8
17
9
Mechanical Connector
Note: Signals referenced are for a DTE device.