Safety; System Safety Guidelines; Safety Guidelines For System Design And Implementation - National Instruments PXIe-4135 Getting Started Manual

Safety

Caution
connecting signals. Failure to observe the specified maximum signal ratings can
cause shock, a fire hazard, or damage to the devices connected to the PXIe-4135. NI
is not liable for any damage or injuries resulting from incorrect signal connections.

System Safety Guidelines

Safety Guidelines for System Design and
Implementation
The PXIe-4135 is capable of generating hazardous voltages and working within hazardous
voltage systems. It is the responsibility of the system designer, integrator, installer,
maintenance personnel, and service personnel to ensure the system is safe during use.
• Ensure operators cannot access the PXIe-4135, cables, the device under test (DUT), or
any other instruments in the system while hazardous voltages are present.
• Operator access points can include, but are not limited to, guards, gates, sliding doors,
hinge doors, lids, covers, and light curtains.
• If using a test fixture enclosure, ensure that it is properly connected to safety ground.
• Ensure that the PXIe-4135 is properly secured to the chassis using the two front panel
mounting screws.
• Double insulate all electrical connections that are accessible by an operator. Double
insulation ensures protection if one layer of insulation fails. Refer to IEC 61010-1 for
specific insulation requirements.
Safety Interlock System Integration
The PXIe-4135 includes a safety interlock circuit that places the outputs of the SMU in a safe
state, regardless of the programmed state of the module.
• Do not short the safety interlock pins directly at the connector under any circumstances.
• Confirm on a regular basis that the safety interlock is functioning by performing a safety
interlock test.
• Install mechanical detection switches that open the safety interlock circuit when the
operator attempts to access the test fixture, disabling the hazardous voltage ranges of the
instrument.
• Ensure the mechanical detection switches close the safety interlock circuit only when the
operator has properly closed all entry points to the test fixture enclosure, enabling
hazardous voltage ranges on the instrument.
6 | ni.com | PXIe-4135 Getting Started Guide
Always refer to the specifications document for your device before