Teds Sensor Connections; Signal Source Connections; Timing Options - Measurement Computing USB-2404-UI User Manual

USB-2404-UI User's Guide

TEDS sensor connections

The USB-2404-UI supports class II TEDS "smart" sensors only. Connect the two TEDS lines to
(T+) and TEDS Common
(terminals 3 through 6).

Signal source connections

You can connect ground-referenced or floating signal sources to the USB-2404-UI. For optimum signal quality,
use shielded cables and twisted pair wiring whenever possible.
When making a floating connection between the signal source and the USB-2404-UI, make sure the voltages on
the positive and negative connections are within the channel-to-earth voltage range. Refer to the Specifications
chapter for operating voltages and information about overvoltage protection.
Don't connect to signals or use for measurements within category III or IV
Refer to the "Safety voltages" section in the Specifications chapter for information about Measurement
Categories.

Timing options

The USB-2404-UI supports four timing options. Each option is optimized for different types of applications by
using different ADC conversion times.

High Speed : optimized for high-speed applications at the expense of noise rejection.

Best 60 Hz Rejection

Best 50 Hz Rejection

High Resolution
50 Hz and 60 Hz noise.
Refer to the analog input specifications for the conversion time and rejection ratio of each option.
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(T–), and ensure that neither T+ nor T– is tied in common to any of the signal inputs
Figure 5. Connecting a grounded signal source
Figure 6. Connecting a floating signal source
: optimized for rejection of 60 Hz noise.
: optimized for rejection of 50 Hz noise.
: optimized for maximum overall noise rejection, and provides a good rejection of both
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Functional Details
TEDS Data
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