3
RS-232 Serial Port Connector
Interconnects
The I
2
C Bus Host Adapter includes three interconnections:
1. RS-232 Serial Port Connector
This connector provides connection to the serial port on the PC.
Use the #C9F25M1 cable to adapt the iPort to 9-pin serial ports.
DB-25 Serial Port Pinout
DB-25 Pin 2, Transmit Data from the Host Computer to the iPort
DB-25 Pin 3, Receive Data from the iPort to the Host Computer.
DB-25 Pin 4, Request to Send from the Host Computer to iPort.
DB-25 Pin 5, Clear to Send from the iPort to the Host Computer.
DB-25 Pin 7, Ground between Host Computer and iPort
DB-9 Serial Port Pinout
iPort implements the RS-232 interface using the following pins:
DB-9 Pin 3, Transmit Data from the Host Computer to the iPort
DB-9 Pin 2, Receive Data from the iPort to the Host Computer.
DB-9 Pin 7, Request to Send from the Host Computer to iPort.
DB-9 Pin 8, Clear to Send from the iPort to the Host Computer.
DB-9 Pin 5, Ground between Host Computer and iPort
