User's Manual

Spectra Precision Focus 4 Total Station User Guide 133

Specifications A

The external device connector is a Hirose HR 10A-7R-6S female connector. The

pinouts for connecting the Focus 4 to an external device connector are shown below:

CAUTION – Only use the pin connections shown above. Using other connections will

damage the instrument.

CAUTION – The Focus 4 total station has different pin assignments from other Spectra

Precision total stations.

To connect to an external power source, supply power to Pin 4 (power terminal) and

Pin 5 (ground terminal) on the instrument. The instrument will use the external power

source even if the internal battery packs is attached.

CAUTION – Make sure that the power supplied is within the rated input range (4.5 V to

5.2 V, 1 A maximum). Power supplied outside this range will damage the instrument.

To communicate with an external device, connect the RS-232C signal from the

external device to Pin 1 (input terminal) and to Pin 2 (output terminal) on the Focus 4.

Cap the data output/external power input connector securely when the Focus 4 is not

in use. The instrument is not watertight if the cap is detached or not attached securely,

or when the data output/external power input connector is in use.

The Focus 4 can be damaged by static electricity from the human body discharged

through the data output/external power input connector. Before handling the

instrument, touch any other conductive material once to remove static electricity.

Pin Signal Description

1 RxD Receive data (Input)

2 TxD Send data (Output)

3 NC No connection

4VPower

5 GND Ground

6 NC No connection

HRS