USB-230 Series
USB-230 Series
16-Bit Multifunction DAQ Devices
Features
• Low cost 16-bit USB DAQ devices
with four differential/eight singleended analog inputs
• Sample rates up to 100 kS/s
• Two 16-bit analog outputs
• Eight individually-configurable
digital I/O lines
• One 32-bit counter input
• Micro-USB Type B connector (no
external power required)
• Available with enclosure and
detachable screw terminal plugs, or
as a board-only OEM version with
header connectors (no case, CD, or
Micro-USB cable included)
Software
Supported Operating Systems
• Windows 8/7/Vista/XP 32/64-bit
Ready-to-Run Applications
• InstaCal (install, configure, and test)
• TracerDAQ (acquire, view, log, and
generate)
Supported Programming Environments
• Visual Studio® and Visual Studio
.NET, including examples for Visual
C++®, Visual C#®, Visual Basic®,
Visual Basic .NET, and other IDEs
• LabVIEW
• DASYLab
Overview
USB-230 Series devices provide improved
cost/performance compared to our similarly priced 16-bit DAQ devices. Each
device offers eight analog inputs, two
analog outputs, eight DIO channels, and
one counter input.
Analog Input
All USB-230 Series devices provide four
differential (DIFF)/eight 16-bit singleended (SE) analog inputs with a fixed
analog input range of ±10 V.
Sample Rate
USB-230 Series devices provide eight SE/four DIFF analog inputs, two simultaneously
updating analog outputs, 8 digital I/O, and one counter input.
No. of
Channels
Max Rate Per Channel
(kS/s)*
USB-231
USB-234
1
50
100
2
25
50
3
16.67
33.33
4
12.5
25
5
10
20
6
8.33
16.67
7
7.14
14.29
8
6.25
12.50
* Sample rates apply to standard and OEM
versions
Analog Output
USB-230 Series devices provide two
16-bit analog outputs. One or both
outputs can be updated at a rate up to
5 kS/s per channel. The output range is
fixed at ±10 V.
The maximum continuous sample rate
is an aggregate rate for USB-230 Series
devices. The following table lists the
maximum rate per channel when scanning from one to eight channels.
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Digital I/O
Eight TTL-level digital I/O lines are
included with USB-230 Series devices.
Each digital channel is software-selectable for input or output.
Digital input voltage ranges from 0 V
to 5 V are permitted, with thresholds of
0.8 V (low) and 2.3 V (high).
When used in output mode, each digital
channel allows for 3.3 V operation with
a source/sink current limit of ±4 mA.
All DIO lines are set to high-impedance
inputs at system startup and reset. The
device does not drive the signal high
or low. Each line has a weak pull-down
resistor connected to it.
All digital I/O updates and samples are
software-paced.
Digital Trigger Input
USB-230 Series devices include an external digital trigger input that is softwareselectable for rising edge or falling edge
detection.
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USB-230 Series
General Information & Software Support
Counter Input
USB-230 Series devices support one 32-bit edge counter (rising)
that accepts inputs up to 5 MHz.
OEM Versions
USB-230 Series OEM versions have board-only form factors
with a header connector for OEM and embedded applications.
All devices can be further customized to meet customer needs.
The OEM versions have the same specifications as the standard devices,
but come in a board-only form factor with a header connector instead
of screw terminals.
Software Support
USB-230 Series devices are supported by the software in the table below.
Ready-to-Run Applications
InstaCal™
An interactive utility that configures and tests MCC hardware. Windows® OS
InstaCal is included with the free MCC DAQ Software bundle (CD/download).
TracerDAQ® and
TracerDAQ Pro
A virtual strip chart, oscilloscope, function generator, and rate generator applications
used to generate, acquire, analyze, display, and export data. The Pro version provides
enhanced features. Windows OS
TracerDAQ is included with the free MCC DAQ Software bundle (CD/download).
TracerDAQ Pro is available as a purchased software download.
General-Purpose Programming Support
Universal Library
(UL)
Programming library of function calls for C, C++, VB, C# .Net, and VB .Net using
Visual Studio and other IDEs. Windows OS
The UL is included with the free MCC DAQ Software bundle (CD/download).
Application-Specific Programming Support
ULx for
NI LabVIEW™
A comprehensive library of VIs and example programs for NI LabVIEW that is used to
develop custom applications that interact with most MCC devices. Windows OS
ULx is included with the free MCC DAQ Software bundle (CD/download).
DASYLab® Driver
Icon-based data acquisition, graphics, control, and analysis software that allows users
to create complex applications in minimal time without text-based programming.
DASYLab is available as a purchased software download. Windows OS
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USB-230 Series
Specifications
USB-230 Series Block Diagram
USB
Connector
(Micro-B)
Full-Speed
USB 2.0
Compliant
Interface
80 MHz Clock
8
Analog Inputs
2
Analog Outputs
Analog Grounds (6)
I/O Connectors
8
Digital I/O
Control Logic
Trigger Input
Counter Input
Digital Grounds (2)
+VO
Specifications
These specifications apply to both USB-230 Series
standard and OEM versions unless noted otherwise.
Analog Input
A/D Converter Type: Successive approximation
ADC Resolution: 16 bits
Sample Rate (Maximum Aggregate)
USB-231: 50 kS/s
USB-234: 100 kS/s
Number Of Channels: 8 single-ended or 4 differential; software-selectable
Input Voltage Range: ±10 V
Working Voltage: ±10 V
Overvoltage Protection
Power On: ±30 V max
Power Off: ±20 V max
Input Impedance: >1 GΩ
Input Bias Current: ±200 pA, typ
INL: ±1.8 LSB
DNL: 16 bits no missing codes
CMRR: 56 dB (DC to 5 kHz)
Input Bandwidth: 300 kHz
Trigger Sources: Software, TRIG
Absolute Accuracy (Analog Input DC
Voltage Measurement Accuracy)
Analog Output
Digital Input/Output
Resolution: 16 bits, 1 in 65,536
Output Range: ±10 V
Number of Channels: 2
Update Rate: 5 kS/s simultaneous per channel max,
hardware-paced
Trigger Sources: Software, TRIG
Output Current Drive: ±5 mA
Short Circuit Current: ±11 mA
Slew Rate: 3 V/µs
Output Impedance: 0.2 Ω
Absolute Accuracy (No Load)
Typical At Full Scale: 8.6 mV
Maximum Over Temperature, Full Scale: 32 mV
INL: ±4 LSB
DNL: 16 bits No Missing Codes
Power-On State: 0 V
Startup Glitch: –7 V for 10 µs
Compatibility: LVTTL, 3.3 V LVCMOS
Number of Channels: 8 (DIO0 through DIO7)
Configuration: Each bit can be configured as input
(power on default) or output
Pull-Down Resistor: 47.5 kΩ to digital ground
(GND).
Absolute Maximum Voltage Range: –0.3 V to 5 V
with respect to digital ground (GND)
Timebase
The following specifications apply to hardwarepaced analog input and analog output sampling
accuracy.
Timebase Frequency: 80 MHz
Timebase Accuracy: ±100 ppm
Timing Resolution: 12.5 ns
(508) 946-5100
Input Voltage Range
Power On: 0 V to 5 V
Power Off: 0 V to 3.3 V
Do not leave a voltage above 3.3 V connected
on the DIO line when the device is not powered.
This can cause long-term reliability issues.
Input Voltage Protection: ±20 V on two lines per
port (maximum of five lines for all ports) for up
to 24 hours
Input High Voltage: 2.3 V min
Input Low Voltage: 0.8 V max
Input Leakage Current
At 3.3 V: 0.8 mA max
At 5 V: 4.5 mA max
Digital Output
Output Low Voltage
4 mA: 0.7 V max
1 mA: 0.2 V max
Output High Voltage: 3.6 V max
4 mA: 2.1 V min
1 mA: 2.8 V min
Maximum Output Current Per Line: ±4 mA
Range: ±10 V
At Full Scale (Typical at 25 °C): 6 mV
At Full Scale (Maximum Over Temperature):
26 mV
System Noise: 0.4 mVrms
Measurement Computing
Digital Input
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USB-230 Series
Specifications & Ordering
External Digital Trigger
USB Specifications
Mechanical
Trigger Source: TRIG input
Trigger Mode: Software-selectable for rising or falling edge. Power on default is rising edge.
Input High Voltage: 2.3 V min
Input Low Voltage: 0.8 V max
Device Type: USB 2.0 full speed (12 Mb/s)
Device Compatibility: USB 1.1, USB 2.0
Connector Type: USB micro-B receptacle
USB Cable Type: A-micro-B cable, UL type AWM
2725 or equivalent
(28 AWG × 2C + 28 AWG × 2C + AB)
USB Cable Length: 3 m (9.84 ft) max
Signal I/O Connector
Standard Versions: Two 16-position screw
terminal plugs
Wire Gauge Range: 16 AWG to 28 AWG
(1.31 to 0.08 mm2)
Torque For Screw Terminals:
0.22 to 0.25 N · m (2.0 to 2.2 lb. · in.)
OEM Versions: One 2 × 17 0.1 in. pitch header
labeled J2
Dimensions (L × W × H)
Standard Versions
With Screw Terminal Connector Plugs:
93.2 × 86.2 × 23.6 mm (3.67 ×3.40 × 0.93 in.)
Without Screw Terminals:
75.4 × 86.2 × 23.6 mm (2.97 ×3.40 × 0.93 in.)
OEM Versions: 98 mm × 64 mm × 12 mm
(3.90 in. × 2.50 in. × 0.50 in.) max
Weight
Standard Versions
With Screw Terminal Connector Plugs: 105 g (3.70 oz)
Without Screw Terminals: 83 g (2.93 oz)
OEM Versions: 31 g (1.10 oz)
Counter
Pin Name: CTR
Number of Counters: 1
Resolution: 32 bits
Counter Type: Edge counter (rising)
Counter Direction: Count up
Counter Source: CTR
Input Frequency: 5 MHz max
High Pulse Width: 100 ns min
Low Pulse Width: 100 ns min
Environmental
Operating Temperature Range: 0 °C to 45 °C
Storage Temperature Range: –40 °C to 85 °C
Operating Humidity Range: 5% to 95% RH, noncondensing
Storage Humidity Range: 5% to 90% RH, noncondensing
Pollution Degree (IEC 60664): 2
Maximum Altitude: 2,000 m (6561.68 ft.)
LED Electrical Characteristics
Calibration
Output Low Voltage
IOL = 8 mA: 0.4 V max
IOL = 18 mA: 1.2 V typ
External Pull-Up Voltage: 5.25 V max
Maximum Sinking Current: 18 mA max
USB-230 Series devices are factory-calibrated. Specifications are guaranteed for one year. For calibration
beyond one year, return the device to the factory for
recalibration.
Memory
Data FIFO: 2,047 samples (4096 bytes)
Non-Volatile Memory
Up to 256 kB microcontroller integrated Flash
2 kB microcontroller integrated EEPROM
Ordering Information
Part No.
Description
USB-231
USB-based DAQ device with eight SE/4 DIFF 16-bit analog inputs, 50 kS/s sampling,
two 16-bit analog outputs, and 8 digital I/O lines. Includes USB cable and MCC DAQ
software CD.
From USB: 4.50 to 5.25 VDC
A typical bus-powered hub provides 100 mA on
its USB lines. The USB-230 Series devices do not
work on bus-powered hubs.
Idle USB Current: 165 mA
Maximum Load USB Current: <500 mA
The maximum power draw from all output terminals should be kept under 0.9 W to avoid overloading the USB port
USB-234
USB-based DAQ device with eight SE/4 DIFF 16-bit analog inputs, 100 kS/s sampling,
two 16-bit analog outputs, and 8 digital I/O lines. Includes USB cable and MCC DAQ
software CD. Document Revision 2
USB-231-OEM
Board-only USB-based DAQ device with eight SE/4 DIFF 16-bit analog inputs, 50 kS/s
sampling, two 16-bit analog outputs, and 8 digital I/O lines
USB-234-OEM
Board-only USB-based DAQ device with eight SE/4 DIFF 16-bit analog inputs,
100 kS/s sampling, two 16-bit analog outputs, and 8 digital I/O lines
Power Output
Software also Available from MCC
Output Voltage: 5 V, ±3%
Maximum Current: 150 mA
Overcurrent Protection: 200 mA
Short Circuit Current: 50 mA
Overvoltage Protection: ±20 V
Part No.
Description
TracerDAQ Pro
A virtual strip chart, oscilloscope, function generator, and rate generator applications
used to generate, acquire, analyze, display, and export data – professional version
with enhanced features.
DASYLab
Icon-based data acquisition, graphics, control, and analysis software that allows users
to create complex applications in minimal time without text-based programming.
Power Requirements
Measurement Computing
DS USB-230-Series-data.indd
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Document Revision 2, November, 2014
© Copyright 2014, Measurement Computing Corporation
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