National Instruments NI PXIe-2526, Руководство пользователя

Страница: 3 / 11

Caution
The protection provided by the NI 2526 can be impaired if it is used in a
manner not described in this document.
Input Characteristics
Maximum switching voltage
.................................................................... Channel-to-channel 150 V
.................................................................... Channel-to-ground 150 V, CAT O
Note
This module is rated for Measurement Category I. It is intended to carry
signal voltages no greater than 150 V. This module can withstand up to 800 V
impulse voltage. Do not use this module for connection to signals or for
measurements within Categories II, III, or IV. Do not connect to MAINS supply
circuits (for example, wall outlets) of 115 VAC or 230 VAC. Refer to the
Read Me
First: Safety and Electromagnetic Compatibility document for more information
about measurement categories.
Measurement Categories CAT I and CAT O (Other) are equivalent and are for measurements
performed on circuits not directly connected to the electrical distribution system referred to as
MAINS voltage. This category is for measurement of voltages from specially protected
secondary circuits. Such voltage measurements include signal levels, special hardware,
limited-energy parts of hardware, circuits powered by regulated low-voltage sources, and
electronics.
Caution
When hazardous voltages (>42.4 V
pk
/60 VDC) are present on any
channel, safety low-voltage (≤42.4 V
pk
/60 VDC) cannot be connected to any other
channel.
............................................................................ Maximum switching power 60 W, 62.5 VA
Caution
The switching power is limited by the maximum switching current, the
maximum voltage, and must not exceed 60 W, 62.5 VA.
............................................................................ CH-COM DC isolation resistance >1 GΩ, typical at 25 °C
Maximum current
.................................................................... Switching 2 A (per channel)
.................................................................... Carry 2 A (per channel)
............................................................................ Minimum switch load 20 mV/1 mA
Note
The NI 2526 is not recommended for 2-wire resistance measurements.
2 | ni.com | NI PXIe-2526 Specifications