TOS93 Series User’s Manual 239
External Control
Activating and Releasing Interlock
Interlock links the product to an external device to stop output appropriately. This ensures the safety of the
operator.
When the interlock is activated, the product switches to PROT
ECTION mode, which prevents tests from
being started with the START switch on the front panel or an external control START signal. Moreover, you
cannot release PROTECTION mode with the STOP switch or the external control STOP signal.
Interlock activation conditions
Open the INTERLOCK+ (1) pin and INTERLOCK- (19) pin of the SIGNAL I/O connector. For the pins to be
considered open, any of the following conditions must be met.
• The resistance between pin 1 and pin 19 is at least 1.2 kΩ.
• If you are using transistors or an optical device, the current flowing across pin 1 and pin 19 is no more
than 5 mA.
Interlock release conditions
Short the INTERLOCK+ (1) pin and INTERLOCK- (19) pin of the SIGNAL I/O connector, and then press
the STOP switch on the front panel or apply an external control STOP signal.
For the pins to be considered shorted, any of the following conditions must be met.
• The resistance between pin 1 and pin 19 is no more than 1 kΩ.
• If you are using transistors or an optical device, the current flowing across pin 1 and pin 19 is at least
6 mA
.
Temporarily releasing interlock
Because nothing is connected to the SIGNAL I/O connector in the factory default conditions, interlock will
be activated when you turn on the POWER switch. To release this temporarily, connect the included
SIGNAL I/O plug to the SIGNAL I/O connector, and then press the STOP switch on the front panel. The
included SIGNAL I/O plug has pins 1 and 19 shorted, so this will release the interlock.
When you actually perform tests, do not use this plug. In particular, if you use tools in a
withstanding voltage test or insulation resistance test, we recommend that you place a cover
over the EUT or install a fence around the EUT to prevent electric shock and devise a
system that shuts off the output when the cover or fence is opened.
To Next Page
Loading...
