Hach 3654 Portable H2/N2 Analyzer manual Pin RS232 Signal Use

12 of 66 Installation - 3654 Portable H2/N2 Analyzer

It is not necessary to keep the PC connected to the instrument during measurement. This connection is required for downloading stored measurements, real-time monitoring, reviewing and changing configuration parameters and testing the instrument from the PC (see “Troubleshooting - Instrument” on page 50 for details).

Fig 1-3:Interface Box Connections

Pin	RS232 Signal	Pin	Use
Pin 1	Transmitted data (TXD)	Pin 1	Not Used
Pin 2	Received data (RXD)	Pin 2	RS-232 Transmitted Data (TXD)
Pin 3	Not Used	Pin 3	RS-232 Received Data (RXD)
Pin 4	Not Used	Pin 4	Not Used
Pin 5	Not Used	Pin 5	Ground
Pin 6	Ground	Pin 6	Not Used
		Pin 7	Not Used
		Pin 8	Not Used
		Pin 9	Not Used

ORBISPHERE Operator Manual