Signature 1100R+, User Manual

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57
Digital I/O
Inputs
There are four inputs in the tester. A VDC logic voltage is typically used to control an input;
however, any VDC up to a nominal 24 volts may be used. Inputs used for the tester’s
External
Switch (and Hipot Safety Switch capability on 1100H+ testers) are described below. If needed,
other inputs can be assigned by using the Scripting option.
Using the External Switch Input
The 1100R+ has the ability to start a test based on input from an external switch, such as a foot
pedal or sensor, in automated test equipment. To use the
External Switch input, you must set
the users preference External Switch to YES. For more information, see User Preferences
on page 35 and External Switch on page 36.
The
External Switch input is on pin 1 of the digital I/O connector. If a VDC +5 (logic high) is
applied to pin 1, the tester behaves as if START TEST were pressed. You can use the VDC +5
power source on the IO connector to supply the VDC +5 through the switch circuit as shown
below. Do not apply a VAC to the input.
Pin 9
DC +5 Volts
Pin 1
External Switch Input
Using the Hipot Safety Switch Input on the 1100H+ Tester (use this as a reference).
The 1100H+ allows you to regulate the application of the hipot portion of the test by the closing of
an external
Hipot Safety Switch. Palm switches (a foot pedal or sensor wired in series) in
automated test equipment can be used. To use the Hipot Safety Switch input you must first set
the users preference Safety Switch to YES . For more information see User Preferences on
page 35.
The
Hipot Safety Switch input is on pin 2 of the digital I/O connector. When a VDC +5 (logic
high) is applied to pin 2, the tester allows the hipot test to proceed. You can use the VDC +5
power source on the digital I/O connector to supply the VDC +5 through the switch circuit. Do
not apply a VAC to the input. Refer to the schematic above for application, using pin 2 instead of
pin 1 for the safety switch.