TOS93 Series User’s Manual 243
External Control
Monitoring the Test Status
Monitoring the test mode
The SIGNAL I/O connector pins are set to low level depending on the set test mode.
Monitoring is not possible for auto tests.
Monitoring the test and voltage generation status
H.V ON/LINE ON (pin 22) of the SIGNAL I/O connector is set to low level in the following cases:
• A test or an auto test is in progress, or voltage is remaining across the output terminals.
• Power is being supplied to the E
UT
from the TOS9303LC through AC LINE OUT.
Monitoring the test status
SIGNAL I/O RISE (pin 23) is set to low level when the voltage is rising.
SIGNAL I/O TEST (pin 24) is set to low level when a test is in progress.
SIGN
AL I/O READY (pin 29) is set to low level when the product is ready to start a test.
Test mode Pins that are set to low level
AC withstanding voltage test ACW (pin 33)
DC withstanding voltage test DCW (pin 34)
Insulation resistance test IR (pin 35)
Earth continuity test EC (pin 36)
Partial Discharge Test PD (pin 28)
Leakage current test LC (pin 37)
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