Model 2450 Interactive SourceMeter® Instrument Reference Manual
Section 2: General operation
2450-901-01 Rev. B/September 2013
2-71
The Model 2450 is provided with an interlock circuit that must be positively activated in
order for the high voltage output to be enabled. The interlock helps facilitate safe operation
of the equipment in a test system. Bypassing the interlock could expose the operator to
hazardous voltages that could result in personal injury or death.
Location of the interlock connection
Figure 45: Rear panel interlock location
Interlock connector pins
An interlock circuit is provided on the rear panel of the instrument. This circuit must be closed to
enable the Model 2450 to produce voltages greater than 38 V DC.
The interlock is intended for use through a normally open switch, which may be installed on the lid of
a test fixture, on the enclosure of a semiconductor prober or device handler, or on the door or doors
of a test equipment rack. The circuit opens when an access door is opened, and closes when the
door is closed.
When the interlock is asserted, the FORCE and GUARD terminals should be considered hazardous
voltages, even if they are programmed to a non-hazardous voltage or current.
Potentially hazardous voltages of up to ±210 V may be present at the High Force, High
Sense, and Guard terminals when the interlock circuit is closed.
To prevent electrical shock, do not expose these lines.
