7.1.25 OUT - Output To User Port
OUT is used where additional switching (other than performed by the nodes of the AT) is required for parts of the test program.
The User Port on the tester has associated with it 6 ‘Relay Driver’ outputs. The OUT test allows programming of the User Port relay driver outputs to perform additional relay switching as part of the test program.
An example of this would be an application where a transformer has two separate primary windings. An OUT test could be used to connect them in series, allowing them to be tested as a single primary with twice the working voltage.
A second example is the switching of additional resistors mounted on the test fixture allowing tests to be included in a program on a transformer with a loaded secondary winding.
SPECIFYING TEST CONDITIONS
Relay Driver Outputs
Each of the relay driver outputs (numbered 0 – 5) is an open collector output which can be set to On or Off as desired:
On = Connected to Gnd (0V)
Off = Open circuit (Floating)
The relay drivers are set as and when the tester encounters an OUT test. The settings given will latch until another OUT test is encountered. Therefore if the settings are required for one part of the test program only, 2 OUT tests will be required, 1 to turn the appropriate relay drivers on and 1 to turn them back off.
12 Volt Supply Pin
The user port also provides a 12V output to supply the power to the relays on your test fixture.
For more information see Chapter 8 – Specification.