Specifications

TOS9220/9221 Part Names and Functions 4-3

[7] OUTPUT A (TOS9221 only)

The A-output terminal of each channel is an output terminal on the high-voltage

side (HIGH VOLTAGE).

The A-output terminal of a channel set to HIGH on the TOS9200/9201 tester is

connected to the high-voltage side (HIGH VOLTAGE potential) of the test volt-

age. The A-output terminal of a channel not set to HIGH is in the open state (not

connected to another point).

[8] OUTPUT B (TOS9221 only)

The B-output terminal of each channel is an output terminal on the low-voltage

side (LOW).

The B-output terminal of a channel set to LOW on the TOS9200/9201 tester is

connected to the low-voltage side (LOW potential) of the test voltage. The B-out-

put terminal of a channel not set to LOW is in the open state (not connected to

another point).

When the tester proper has activated the contact check function, voltage is tempo-

rarily applied to the B-output terminals of channels set to both the high-voltage

and low-voltage sides, in order to check the contact condition. Since in this wir-

ing conﬁguration high voltage is also applied to the four terminals provided as the

low-voltage side output terminals, they should be handled in the same way as the

A-output terminals.

[9] IN HIGH VOLTAGE

This terminal connects to the OUT HIGH VOLTAGE terminal of the tester proper

or to another TOS9220/9221 scanner connected in parallel, in order to receive the

test voltage from the TOS9200/9201 tester. During a test, the test voltage is sup-

plied continuously.

[10] IN LOW

This terminal connects to the LOW terminal of the TOS9200/9201 tester or to the

OUT LOW terminal of another TOS9220/9221 scanner connected in parallel.

[11] OUT HIGH VOLTAGE

This terminal supplies the test voltage supplied from the tester proper to the IN

HIGH VOLTAGE terminal of another TOS9220/9221 scanner connected in paral-

lel when multiple scanners are used in parallel connection. During a test, the test

voltage is supplied at all times.

• This terminal is not used to connect to the DUT.

[12] OUT LOW

This terminal connects to the IN LOW terminal of another TOS9220/9221 scan-

ner when multiple scanners are used in parallel conﬁgurations.

NOTE