Isolation
Caution
Isolation voltage ratings apply to the voltage measured between any
channel pin and the chassis ground. When operating channels in series or floating on
top of external voltage references, ensure that no terminal exceeds this rating.
Attention
Les tensions nominales d'isolation s'appliquent à la tension mesurée
entre n'importe quelle broche de voie et la masse du châssis. Lors de l'utilisation de
voies en série ou flottantes en plus des références de tension externes, assurez-vous
qu'aucun terminal ne dépasse cette valeur nominale.
Caution
Do not connect the TB-414X to signals or use for measurements within
Measurement Categories II, III, or IV.
Attention
Ne connectez pas le TB-414X à des signaux et ne l'utilisez pas pour
effectuer des mesures dans les catégories de mesure II, III ou IV.
Measurement Category I is for measurements performed on circuits not directly connected to
the electrical distribution system referred to as
MAINS
voltage. MAINS is a hazardous live
electrical supply system that powers equipment. This category is for measurements of voltages
from specially protected secondary circuits. Such voltage measurements include signal levels,
special equipment, limited-energy parts of equipment, circuits powered by regulated low-
voltage sources, and electronics.
Note
Measurement Categories CAT I and CAT O are equivalent. These test and
measurement circuits are for other circuits not intended for direct connection to the
MAINS building installations of Measurement Categories CAT II, CAT III, or
CAT IV.
Isolation voltage, channel to earth ground
5
60 V DC, CAT I
Withstand voltage
800 V
pk
Screw Terminal Wiring
Screw terminal wire gauge
24 to 18 AWG
Length of bare wire (insulation stripped)
from one end of the wire
5 mm to 6 mm (0.197 in. to 0.236 in.)
Screw terminal torque
0.5 Nm (4 lb · in.)
Spacing between screw terminals
3.5 mm (0.14 in.)
5
While TB-414X channels are isolated from each other, this isolation is considered functional
isolation for the purpose of allowing the separation of return currents and is not intended to operate
continuously under significant voltages or provide safety isolation. The TB-414X is intended for
use with PXIe-414
x
SMUs which are isolated from earth ground, but share a common LO for all
channels (bank isolation).
TB-414X User Guide
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© National Instruments Corporation
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