•
Ensure the switches' certifications meet your test application requirements. NI
recommends UL-certified safety switches to ensure reliability.
•
Install the switches in accordance with the switch manufacturer specifications.
•
Test the switches periodically to ensure proper implementation and reliability.
Safety Guidelines for System Operation
Caution
Hazardous voltage of up to the maximum voltage of the device may
appear at the output terminals if the safety interlock terminal is closed. Open the
safety interlock terminal when the output connections are accessible. With the safety
interlock terminal open the output voltage level/limit is limited to ±40 VDC, and
protection will be triggered if the voltage measured between the device HI and LO
terminals exceeds ±(42 Vpk ±0.4 V).
Caution
Do not apply voltage to the safety interlock connector inputs. The
interlock connector is designed to accept passive normally open contact closure
connections only.
To ensure a system containing the NI 4136/4137 is safe for operators, components, or
conductors, take the following safety precautions:
•
Ensure proper warnings and signage exists for workers in the area of operation.
•
Provide training to all system operators so that they understand the potential hazards and
how to protect themselves.
•
Inspect connectors, cables, switches, and any test probes for any wear or cracking before
each use.
•
Before touching any of the connections to the high terminal or high sense on the
NI 4136/4137, discharge all components connected to the measurement path. Verify with
a DMM before interaction with connections.
Installing the NI 4136/4137
Caution
To prevent damage to the device caused by ESD or contamination, handle
the device using the edges or the metal bracket.
1.
Ensure the AC power source is connected to the chassis before installing the modules.
The AC power cord grounds the chassis and protects it from electrical damage while you
install the modules.
2.
Power off the chassis.
3.
Inspect the slot pins on the chassis backplane for any bends or damage prior to
installation. Do not install a module if the backplane is damaged.
4.
Remove the black plastic connectors from all the captive screws on the module front
panel.
5.
Identify a supported slot in the chassis. The following figure shows the symbols that
indicate the slot types.
NI PXIe-4136/4137 Getting Started Guide
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© National Instruments
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