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Chapter 1 Introduction
© National Instruments Corporation 1-3 GPIB-120A User Manual
What You Need to Get Started
One of the following GPIB-120A Bus Expanders/Isolators:
GPIB-120A (100 to 120 VAC)
GPIB-120A (220 to 240 VAC)
2.2 m, 125 VAC Power Cord (When connected to a power source, this cord connects the
equipment chassis to power ground.)
Optional Equipment
You can contact National Instruments to order any of the following optional equipment.
• Rack-Mount Kit
Single Rack-Mount Kit
Dual Rack-Mount Kit
• Shielded GPIB cables*
Type X1 single-shielded GPIB cables (1 m, 2 m, or 4 m)
Type X2 double-shielded GPIB cables (1 m, 2 m, or 4 m)
* To meet FCC emission limits for this Class A device, you must use a shielded (Type X1 or
X2) GPIB cable. Operating this equipment with a non-shielded cable may cause interference
to radio and television reception in commercial areas.
Unpacking Your GPIB-120A
Follow these steps when unpacking your GPIB-120A.
1. Verify that the package you received contained everything you need to get started, as listed
earlier in this chapter.
2. Inspect the shipping container and contents for damage. If the container is damaged and the
damage appears to have been caused in shipment, file a claim with the carrier. If the
equipment is damaged, do not attempt to operate it. Contact National Instruments for
instructions. Retain the shipping material for possible inspection by carrier or reshipment of
the equipment.
3. Verify that the voltage you will be using is the same as that marked on the rear panel of the
GPIB-120A.
Note: The GPIB-120A is shipped from the factory set at a certain operating voltage, either
100 to 120 VAC or 220 to 240 VAC. Operating the unit at the wrong voltage can
damage the unit. If the GPIB-120A is set at a voltage other than the one you will be
using, contact National Instruments for further instructions.