Honeywell International Inc. 7400-476 Manuale Utente

There is a 5V DC power supply connector and an RS-232 connector:

Power supply connector  Use this connector to attach a power supply to the IntelliBase.  The power supply provides 5V DC 
input for communications and battery charging.

  Use a standard serial cable to connect this port to a host RS-232 device. 

Rear View of Dolphin IntelliBase

Power Supply 
Connector

RS-232 
Connector