INTERFACE DETAILS VOLTECH AT3600 USER MANUAL
2.8. USER PORT
The User Port is positioned on the top moulding of the AT Series Testers, at the
rear behind the fixture board recess.
The port contains six open-collector relay drive outputs, and two HC MOS
compatible inputs.
The relay drives are switched on and off by certain optional tests (e.g. the OUT
test) inserted into your test program. This will enable you, for example, to switch
a dummy load on to the secondary winding of the transformer under test, so that
subsequent tests are performed on the loaded transformer.
BEWARE OF HIGH VOLTAGES
Remember when designing relays into your fixture that the AT3600 is
capable of producing very high voltages.
It is the responsibility of the user to ensure that both the relays themselves,
and the associated wiring are able to withstand any high voltage produced in
the test program.
!
It is particularly important that YOU ensure that there is never a flash-over
from a high voltage test signal to a relay coil driven from the User Port. Such
a flash-over would cause extensive damage to the circuits inside the Tester.
If in any doubt, contact your Voltech supplier for advice on which relay to
use in your application.
PAGE 8.2.8. VPN 98 - 024 INTERFACE DETAILS
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