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Chapter 1
Introducing the USB-2416-4AO
Overview: USB-2416-4AO features
is a multifunction measurement and control board designed for the USB bus.
The USB-2416-4AO is a full-speed (up to1 kS/s), multiplexed 24-bit measurement system that provides up to
16 differential and up to 32 single-ended (SE) analog inputs. It offers software-selectable analog input ranges of
±20 V, ±10 V, ±5 V, ±2.5 V, ±1.25 V, ±0.625 V, ±0.312 V, ±0.156 V, and ±0.078 V.
It also protects your computer by providing a minimum of 500 VDC input isolation between field wiring and
the USB interface.
You can configure up to 16 of the analog inputs as differential thermocouple (TC) inputs. In thermocouple
mode, the USB-2416-4AO includes built-in cold-junction compensation and open thermocouple detection.
You can add up to 32 single-ended or up to 16 differential channels by connecting the USB-2416-4AO to an
AI-EXP32 expansion module. Each channel is software-configurable as single-ended or differential. For each
channel pair configured differentially, you lose one SE channel.
The USB-2416-4AO has four 16-bit analog output channels with an update rate of up to1 kS/s and an output
range of ±10 V.
The device has eight lines of digital I/O and two 32-bit counters. You can expand up to 24 DIO channels by
connecting the USB-2416-4AO to an AI-EXP32 expansion module.
Six banks of removable screw-terminal blocks provide connectivity to the analog input channels, digital I/O
lines, counter/timer channels, and analog outputs.
Functional block diagram
USB-2416-4AO functions are illustrated in the block diagram shown here.
Figure 1. Functional block diagram
