Kikusui TOS5050A, Руководство по эксплуатации

Страница: 84 / 120

6-24 TOS5051A/5050A
6.3.3 Interlock Function
The tester has an interlock function as a safety feature. When the interlock circuit is
opened, the tester falls into the PROTECTION status (the “PROTECTION” mes-
sage appears). In this status, the tester cuts off the test voltage, and does not respond
to the start signal applied either locally from the START switch or remotely via the
remote-control connector or to the stop signal applied either locally from the STOP
switch or remotely via the remote-control connector.
Using the interlock function
Pins 1 and 9 of the SIGNAL I/O connector is the input terminal for the interlock sig-
nal. The interlock function is enabled when the circuit is made open; it is released
when the circuit is closed.
To clear the PROTECTION status caused by the interlock function, turn the inter-
lock signal to the low level and then press the STOP switch or apply a remote-con-
trolled STOP signal.
Reference circuit
When the door opens the contact opens. Consequently, the interlock function is acti-
vated.
Fig. 6-3 Circuit diagram of the interlock input section
• If you turn on the power to the tester simply after taking the tester out from
the box, the interlock function will be activated and the tester will not start
operating.
A 14-pin Amphenol plug with pins 1 and 9 connected are supplied as an
accessory to the tester. Use this plug only to release the protection tempo-
rarily.
When the tester is actually installed, use the interlock function as much as
possible and furnish a safe working environment. When using special tools
in the withstanding voltage test, some of the effective safety measures are to
(1) provide a cover for the DUT to prevent electric shock,
(2) shut down the output in synchronization with the opening of the cover,
and/or
(3) setup a safety fence around the working area and shut down the output in
synchronization with the door.
1 2 3 4 5 6 7
14 13 12 11 10 9 8
SIGNAL I/O
Door switch
+
-
INTERLOCK
Door switch
TOS5050A/5051A internal circuit
+15 V
+
–
1 k
1 k
2 k
1
9
5.6 V
WARNING