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4 Channels of Universal Analog Input
Measures: Voltage (±125 mV, ±1V, ±4V, ±15V, ±60V), Current (±25 mA), Thermocouples (J, K, T, E, R, S, N, B), RTDs (Pt100, Pt1000, 3- and 4-Wire), Resistance (2- and 4-Wire), and Bridge-Based Sensors (Quarter-, Half-, and Full-Bridge)
Simultaneous Sampling at Up to 100 S/s Per Channel
250 Vrms Channel-to-Channel and Channel-to-Ground Isolation
Built-In Thermistor for Cold-Junction Compensation (CJC)
Six-Position Input Screw Terminal Allows Different Measurement Types to be Performed On Each Channel
The new OM-USB-2404-UI provides four channels
of 24-bit universal analog input with integrated signal
conditioning. The device can be used to measure a
variety of sensor types such as RTDs, thermocouples,
load cells, and other powered sensors. The four
channels are individually configurable, so a different
measurement type can be performed on each channel.
All channels are measured simultaneously at up to
100 S/s per channel.
The OM-USB-2404-UI can perform
the following measurements:
• RTD (3- and 4-wire)
• Resistance (2- and 4-wire)
• Bridge-based sensors (quarter-, half-, and full-bridge)
Measurement ranges vary for each type of
measurement (see PDF for complete specifications).
The device features a built-in current and voltage
excitation. The excitation circuit is protected from
overcurrent and overvoltage fault conditions. Each
channel also has a built-in thermistor for cold-junction
compensation (CJC) calculations when measuring
thermocouples. An analog pre-filter removes noise
that may be present in the signals prior to conversion.
With 250 Vac channel-to-channel and channel-to-ground
isolation, the OM-USB-2404-UI protects the
individual channels and connected computer and
ensures a reliable data stream. Each channel has a
detachable six-position screw terminal block for field
The OM-USB-2404-UI ships with a 2 m (6') USB
cable and is powered by the 5V USB supply from
your computer. No external power is required.
The OM-USB-2404-UI is a USB 2.0 high-speed device
that is supported under popular Microsoft Windows®
operating systems. The OM-USB-2404-UI is fully
compatible with both USB 1.1 and USB 2.0 ports.
The OM-USB-2404-UI module ships with an
impressive array of software, including the new
TracerDAQ®, a full-featured, out-of-the-box data
logging, viewing, and analysis application. Driver
support and detailed example programs are included
for Universal Library programming libraries for
Microsoft® Visual Studio® programming languages, and
other languages, including DASYLab®, and ULx for NI
LabVIEW® (comprehensive library of Vls and example
programs compatible with 32-bit and 64-bit LabVIEW
v8.5 through 2013) and InstaCal™ installation,
calibration and test utility-powerful solutions for
programmers and nonprogrammers alike. These
modules operate under Microsoft Windows® XP
(32-bit only) and VISTA/7/8 (32-bit and 64-bit)
The OM-USB-2404-UI data acquisition module is
supplied with TracerDAQ software which is a collection
of four virtual instrument applications used to
graphically display and store input data and generate
• Strip Chart—Log and graph values acquired from analog inputs, digital inputs, temperature inputs and counter inputs
• Oscilloscope—Display values acquired from analog inputs
• Function Generator—Generate waveforms for analog outputs
• Rate Generator—Generate waveforms for counter outputs
TracerDAQ PRO is an enhanced version of TracerDAQ.
A comparison of some of the features included in
TracerDAQ vs TracerDAQ PRO is shown on the PDF.
SPECIFICATIONS ANALOG INPUT Number of Channels: 4 A/D Converter Resolution: 24-bit A/D Converter Type: Delta-Sigma with analog pre-filtering Sampling Mode: Simultaneous TEDS Sensor Type Supported: IEEE 1451.4 TEDS Class II (interface) Input Mode: Voltage, current, resistance (2- and 4-wire), RTD (3- and 4-wire), thermocouple, quarter-bridge, half-bridge, full-bridge Conversion Time (No channels in TC mode) High Speed: 10 ms for all channels Best 60 Hz Rejection: 110 ms for all channels Best 50 Hz Rejection: 130 ms for all channels High Resolution: 500 ms for all channels Conversion Time (One or More Channels in TC Mode) High Speed: 20 ms for all channels Best 60 Hz Rejection: 120 ms for all channels Best 50 Hz Rejection: 140 ms for all channels High Resolution: 510 ms for all channels Overvoltage Protection Terminals 1 and 2: ±30V Terminals 3 Through 6, Across any Combination: ±60V Input Impedance Voltage Mode (±60V, ±15V, ±4V): 1 MΩ Current Mode: <40 Ω All Other Modes: >1GΩ Input Bias Current: <1nA Integral Non-Linearity (INL): ±15 ppm Common Mode Rejection Ratio (CMRR): >100 dB Normal Mode Rejection Ratio (NMRR) Best 60 Hz Rejection: 90 dB at 60 Hz Best 50 Hz Rejection: 80 dB at 50 Hz High Resolution: 65 dB at 50 Hz and 60 Hz
GENERAL Operating Temperature Range: 0 to 60ºC
(32 to 140ºF), 10 to 90% RH non-condensing Storage Temperature Range: -40 to 85ºC
(-40 to 185ºF), 5 to 95% RH non-condensing Communications: USB 2.0 Hi-Speed mode (480 Mbps)
is recommended; otherwise USB 1.1 full-speed mode
(12 Mbps) Current Consumption from USB: 500 mA, maximum Channel-to-Earth Ground Isolation Continuous: 250 Vrms (measurement category
II for measurements performed on circuits directly
connected to the electrical distribution system) Withstand: 2300 Vrms (verified by a 5 second
dielectric withstand test) Channel-to-Channel Isolation Continuous: 250 Vrms (measurement category
II for measurements performed on circuits directly
connected to the electrical distribution system) Withstand: 1390 Vrms (verified by a 5 second
dielectric withstand test) Signal I/O Connector: 6-position screw terminals Screw terminal Wiring: 18 to 28 AWG copper conductor
wire with 7 mm (0.28") of insulation stripped from the end Maximum Altitude: 2000 m (6562') Dimensions: 134 L x 143 W x 39 mm H (5.27 x 5.64 x 1.54") Weight: 567 g (1.25 lb)
† All amounts shown in DKK Noter: Comes complete with 2 m (6') USB cable and TracerDAQ software and user manual on CD.