AppendixA Specificationsfor Maximum Signal Ratings for AT Series Devices
©NationalInstruments Corporation A-39 ATE Series User Manual
Test the Connections

Theeasi est way to check the proper limits of the I/O signals is to measure

themwith a voltmeter. Be sure to check the signal levels before connecting

them to theI /O connectorof the DAQ device. Connect the negative lead

(usually black) of the voltmeter to a ground terminal on the computer

chassis.This can be a grounding lug at the back of the computer, or any part

ofthe basemetal computer chassis.Then measure each signal input using

thevoltm eter’s positive terminal(usually red). In the case of a differential

signal,m easureeach signal in the differential pair individually. Measure

both the DC and AC voltage of each signal.

EXTREF ±25V1±15 V1±35 V ±25V ±25V2±15 V2
PFI0 5.5to –0.5 V3±35 V45.5 to –0.5 V3±0.5 V55.5 to –0.5 V3±0.5 V5
PFI<1..9> 5.5to –0.5 V3±0.5 V55.5 to –0.5 V3±0.5 V55.5 to –0.5 V3±0.5 V5
DIO<x>5.5 to –0.5 V3±0.5 V55.5 to –0.5 V3±0.5 V55.5 to –0.5 V3±0.5 V5
PA, P B, PC< x> N/A N/A 5.5to –0.5 V3, 6 ±0.5V5, 6 N/A N/A
DACxOUT Outputonly
EXTSTROBE* Outputonly
SCANCLK Outputonly
GPCTR0_OUT Outputonly
FREQ_OUT Outputonly
VCC Outputonly
1N/Afor AT-MIO-16XE-10and AT-AI-16XE-10.
2N/Afor AT-MIO-16XE-50,PCI-MIO-16XE-50, and DAQPad-MIO-16XE-50.
3Whenconfigured as a digital input.
4WhenPFI0 is configured as an analog trigger or the DAQ device is powered off, the input protection levelis ±35 V.
5TheE Series devices guarantee a powered off input protection level of ±0.5 V.This level can be exceeded if the source of
theinput signal has a current limited output, such as any member of the LS, HC, or HCT logic families.
6N/Afor AT-MIO-16E-10.
SignalName
AT-MIO-16E-1
AT-MIO-16E-2
AT-MIO-64E-3
AT-MIO-16XE-10
AT-AI-16XE-10
AT-MIO-16E-10
AT-MI O-16DE -10 AT-MIO-16XE-50
On Off On Off On Off