TTi Laboratory Power Supply Products

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Four modes of operation

The PL303QMD is more than just two PL303 single power supplies in one box. It has four modes of operation:

Independent:

The two outputs are completely independent and electrically isolated from each other.

Isolated Tracking:

The two outputs remain electrically isolated, but the voltage control of the Master output sets an identical voltage on the Slave output.

Isolated Tracking enables the user to create two rails of either polarity and to reference them to different grounds if necessary (e.g. digital ground and analog ground) offering maximum flexibility.

Isolated Ratio Tracking:

As above, but the Slave voltage can be set to to any percentage of the Master voltage and will retain that percentage ratio as the Master voltage is varied.

True Parallel:

All of the power (up to 180 watts) is channelled to the Master output which can consequently supply up to 6 amps. The Slave output is turned off and its meters are blanked.

In Parallel mode the unit becomes a single 180W power supply, with the current meter operating to 6 amps.

Simultaneous control of both outputs

The Both On/Both Off buttons are in addition to the individual switches for each output, and allow both outputs to be turned on or off synchronously by a single button press.

Synchronous switching of the outputs is of increasing importance for circuitry which can be damaged if one voltage rail is present without the other.

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Thurlby Thandar Instruments Limited
Glebe Road, Huntingdon, Cambridgeshire PE29 7DR
Tel: 01480 412451  Fax: 01480 450409  Web: www.tti.co.uk  Email: sales@tti.co.uk