USB-1616FS
Measurement Advantage™ brand
USB-based Analog and Digital I/O
User's Guide
© Copyright 2005, Measurement Computing Corporation™
Document Revision 3, March, 2005
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USB-1616FS User's Guide
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HM USB-1616FS.doc
ii
Table of Contents
Preface
About this User's Guide .......................................................................................................................v
What you will learn from this user's guide .........................................................................................................v
Conventions in this user's guide .........................................................................................................................v
Where to find more information.........................................................................................................................v
Chapter 1
Introducing the USB-1616FS............................................................................................................ 1-1
Overview: USB-1616FS features ................................................................................................................... 1-1
USB-1616FS block diagram........................................................................................................................... 1-2
Software features............................................................................................................................................ 1-3
Connecting a USB-1616FS to your computer is easy..................................................................................... 1-3
Chapter 2
Installing the USB-1616FS................................................................................................................ 2-1
What comes with your USB-1616FS shipment? ............................................................................................ 2-1
Hardware ....................................................................................................................................................................... 2-1
Software......................................................................................................................................................................... 2-1
Documentation............................................................................................................................................................... 2-2
Unpacking the USB-1616FS .......................................................................................................................... 2-2
Installing the software .................................................................................................................................... 2-2
Installing the USB-1616FS............................................................................................................................. 2-2
Connecting the external power supply........................................................................................................................... 2-2
Connecting the USB-1616FS to your system................................................................................................................. 2-3
Chapter 3
Functional Details ............................................................................................................................. 3-1
Theory of operation - analog input acquisition modes ................................................................................... 3-1
Software paced mode..................................................................................................................................................... 3-1
Continuous scan mode ................................................................................................................................................... 3-1
Burst scan mode............................................................................................................................................................. 3-1
Internal components ....................................................................................................................................... 3-2
USB OUT connector...................................................................................................................................................... 3-2
USB IN connector.......................................................................................................................................................... 3-2
External power connectors............................................................................................................................................. 3-3
USB LED....................................................................................................................................................................... 3-3
PWR LED...................................................................................................................................................................... 3-3
Screw terminal wiring.................................................................................................................................................... 3-3
Analog input terminals (CH0 IN to CH15 IN)............................................................................................................... 3-4
Digital I/O terminals (DIO0 to DIO7)............................................................................................................................ 3-5
Power terminals ............................................................................................................................................................. 3-6
Ground terminals ...........................................................................................................................................................3-6
Counter terminal ............................................................................................................................................................ 3-7
Trigger terminal............................................................................................................................................................. 3-7
SYNC terminal ..............................................................................................................................................................3-7
Daisy chaining additional modules to the USB-1616FS ................................................................................ 3-7
Sample rate limitations when using multiple USB-1616FS devices.............................................................................. 3-8
Power limitations when using multiple USB-1616FS devices....................................................................................... 3-8
Accuracy......................................................................................................................................................... 3-8
Gain queue.................................................................................................................................................... 3-11
Synchronizing multiple units........................................................................................................................ 3-11
iii
USB-1616FS User's Guide
Chapter 4
Specifications ....................................................................................................................................4-1
Analog input section....................................................................................................................................... 4-1
Single board throughput................................................................................................................................................. 4-2
Multiple board throughput .............................................................................................................................................4-2
Throughput benchmarks ................................................................................................................................................4-3
Usage note ..................................................................................................................................................................... 4-3
Digital input/output ........................................................................................................................................ 4-4
External trigger............................................................................................................................................... 4-4
External clock input/output ............................................................................................................................ 4-4
Counter section............................................................................................................................................... 4-5
Memory .......................................................................................................................................................... 4-5
Microcontroller............................................................................................................................................... 4-5
Power.............................................................................................................................................................. 4-5
USB +5 V voltage .......................................................................................................................................... 4-6
External power input ...................................................................................................................................... 4-6
External power output .................................................................................................................................... 4-6
USB specifications ......................................................................................................................................... 4-6
Environmental ................................................................................................................................................ 4-6
Mechanical ..................................................................................................................................................... 4-7
Screw terminal connector type ....................................................................................................................... 4-7
Screw terminal pin out.................................................................................................................................... 4-7
iv
Preface
About this User's Guide
What you will learn from this user's guide
This user's guide explains how to install, configure, and use the USB-1616FS so that you get the most out
of its analog and digital I/O features. This user's guide also refers you to related documents available on our
web site, and to technical support resources.
Conventions in this user's guide
For more information on …
Text presented in a box signifies additional information and helpful hints related to the subject matter you
are reading.
Caution! Shaded caution statements present information to help you avoid injuring yourself and others,
damaging your hardware, or losing your data.
<#:#>
bold text Bold text is used for the names of objects on the screen, such as buttons, text boxes, and check
italic text
Angle brackets that enclose numbers separated by a colon signify a range of numbers, such as those
assigned to registers, bit settings, etc.
boxes. For example:
1. Insert the disk or CD and click the OK button.
Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase.
For example:
! The InstaCal® installation procedure is explained in the DAQ Software Quick Start.
! Never touch the exposed pins or circuit connections on the board.
Where to find more information
The following electronic documents provide information relevant to the operation of your Measurement
Advantage™ brand USB-1616FS.
! MCC's Specifications: USB-1616FS (the PDF version of Chapter 4 in this guide) is available on our
web site at www.mccdaq.com/pdfs/USB-1616FS.pdf
! MCC's DAQ Software Quick Start is available on our web site at
! MCC's Universal Library User's Guide is available on our web site at
.
.
.
! MCC's Universal Library Function Reference is available on our web site at
! MCC's Universal Library for LabVIEW
! MCC's Guide to Signal Connections is available on our web site at
www.mccdaq.com/signals/signals.pdf
USB-1616FS User’s Guide (this document) is available in PDF on our web site at
.
™
User’s Guide is available on our web site at
.
.
.
v
Chapter 1
Introducing the USB-1616FS
Overview: USB-1616FS features
This user's guide contains all of the information you need to connect the USB-1616FS to your computer
and to the signals you want to measure. The USB-1616FS is part of the Measurement Advantage™ brand
of USB-based data acquisition products.
The USB-1616FS is a USB 2.0 full-speed device supported under Microsoft® Windows® 98 (2
Windows ME, Windows 2000, and Windows XP.
The USB-1616FS provides true simultaneous sampling of up to sixteen 16-bit single-ended analog inputs.
Simultaneous input sampling is accomplished through the use of one A/D converter per channel. The
module features sampling rates of up to 50 kS/s per channel, and up to 9500 S/s per channel throughput for
all channels. You can configure the analog input range of each channel independently via software. An onboard temperature sensor lets you monitor your environment temperature.
Eight digital IO lines are independently selectable as input or output. A 32-bit counter can count TTL
pulses. A SYNC (synchronization) control line lets you synchronize two USB-1616FS modules to acquire
data synchronously from 32 analog inputs.
The USB-1616FS is powered by an external +9 V unregulated power supply that is shipped with the board.
POWER OUT and USB OUT connectors let you power and control multiple Measurement Advantage
boards from one external power source and one USB port in a daisy chain fashion.
The USB-1616FS is enclosed in a rugged housing that you can mount on a DIN rail or on a bench. The
USB-1616FS is shown in Figure 1-1.
nd
edition),
Figure 1-1. USB-1616FS
1-1
USB-1616FS User's Guide Introducing the USB-1616FS
V
USB-1616FS block diagram
USB-1616FS functions are illustrated in the block diagram shown here.
Screw terminal I/O connector
Cal Ref
oltages
Temp.
Sensor
G= 1, 2,
5, 10
32-bit
Event Counter
A/D 0
A/D 1
A/D 2
A/D 3
A/D 4
A/D 5
A/D 6
A/D 7
A/D 8
A/D 9
A/D 11
A/D 10
A/D 12
A/D 13
A/D 14
A/D 15
1 channel
1
USB
USB
Full-speed
USB 2.0
Compliant
Interface
32k x 16
SRAM
16
16
SPI
16
8
DIO
Screw terminal I/O connector
USB
Microcontroller
SYNC
TRIG_IN
Figure 1-2. USB-1616FS functional block diagram
1-2
USB-1616FS User's Guide Introducing the USB-1616FS
Software features
The following software ships with the USB-1616FS free of charge.
! InstaCal installation, calibration, and test utility
! TracerDAQ™ suite of virtual instruments
! SoftWIRE® for Visual Studio® .NET graphical programming
! MCC DAQ Components for VS .NET (installed with SoftWIRE® for VS .NET)
For information on the features of InstaCal, TracerDAQ, and SoftWIRE, refer to the DAQ Software Quick
Start booklet that shipped with the USB-1616FS.
Connecting a USB-1616FS to your computer is easy
Installing a data acquisition device has never been easier.
! The USB-1616FS relies upon the Microsoft Human Interface Device (HID) class drivers. The HID
class drivers ship with every copy of Windows that is designed to work with USB ports. We use the
Microsoft HID because it is a standard, and its performance delivers full control and maximizes data
transfer rates for your USB-1616FS. No third-party device driver is required.
! The USB-1616FS is plug-and-play. There are no jumpers to position, DIP switches to set, or interrupts
to configure.
! You can connect the USB-1616FS before or after you install the software, and without powering down
your computer first. When you connect an HID to your system, your computer automatically detects it
and configures the necessary software. You can connect and power multiple HID peripherals to your
system using a USB hub.
! You can connect your system to various devices using a standard four-wire cable. The USB connector
improves upon serial and parallel port connectors with one standardized plug and port combination.
! Data can flow two ways between a computer and peripheral over USB connections.
Make sure that you have the latest Windows Updates installed for your USB driver, particularly "XP Hotfix
KB822603."
1-3
Installing the USB-1616FS
What comes with your USB-1616FS shipment?
As you unpack your USB-1616FS, verify that the following components are included.
Hardware
! USB-1616FS
Chapter 2
! USB cable (24 AWG VBUS/GND, 2 meter length)
! External power supply and cord (CB-PWR-9V3A) – 9 volt, 3 amp DC power supply
Software
The Measurement Computing Data Acquisition Software CD contains the following software:
! InstaCal installation, calibration, and test utility
! TracerDAQ suite of virtual instruments
! SoftWIRE for VS .NET
! SoftWIRE MCC DAQ Components for .NET
2-1
USB-1616FS User's Guide Installing the USB-1616FS
Documentation
Unpacking the USB-1616FS
As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the USB-1616FS from its packaging, ground yourself using a wrist strap or by
simply touching the computer chassis or other grounded object to eliminate any stored static charge.
If your USB-1616FS arrives already damaged, notify Measurement Computing Corporation immediately
by phone, fax, or email. For international customers, contact your local distributor where you purchased the
USB-1616FS.
! Phone: 508-946-5100 and follow the instructions for reaching Tech Support.
! Fax: 508-946-9500 to the attention of Tech Support
! Email: techsupport@measurementcomputing.com
Installing the software
Refer to the DAQ Software Quick Start for instructions on installing the software on the Measurement
Computing Data Acquisition Software CD. This booklet is available in PDF at
.
Installing the USB-1616FS
Before you connect the USB-1616FS to your computer, connect the external power supply that was
shipped with the device.
You can connect up to four Measurement Advantage products in a daisy chain configuration to a single
USB 2.0 port on your computer. If your system has a USB 1.1 port, you can connect up to two
Measurement Advantage products.
Connecting the external power supply
Power to the USB-1616FS is provided with the +9 V external power supply (CB-PWR-9V3A). You must
connect the external power supply before connecting the USB cable to the USB-1616FS and your
computer.
2-2
USB-1616FS User's Guide Installing the USB-1616FS
To connect the power supply to your USB-1616FS, do the following.
1. Connect the external power cord to the
enclosure. This connector is labeled
POWER IN connector on the rear of the USB-1616FS
IN on the board.
2. Plug the power supply into a power outlet.
The
PWR LED illuminates green when +9 V power is supplied to the USB-1616FS. If the voltage supply is
less than +6.0 V or more than +12.5 V, the PWR LED does not light.
Do not connect external power to the POWER OUT connector
The power connector labeled POWER OUT on the enclosure (OUT on the board) is used to provide power
to an additional Measurement Advantage product. If you connect the external power supply to the POWER
OUT connector, the USB-1616FS does not receive power, and the PWR LED does not illuminate.
Connecting the USB-1616FS to your system
To connect the USB-1616FS to your system, do the following.
1. Connect the USB cable that was shipped with the device to the USB connector labeled USB IN on
the USB-1616FS.
The USB cable supplied with the USB-1616FS has a higher gauge wire than generic USB cables, and
is required for proper enumeration of the USB-1616FS.
2. Connect the other end of the USB cable to a USB port on your computer or to an external USB hub
that is connected to your computer. The
and communication to the USB-1616FS.
PWR LED illuminates green. The USB cable provides power
The USB-1616FS installs as a composite device with separate devices attached. When you connect the
USB-1616FS for the first time,
Found New Hardware popup balloons (Windows XP) or dialogs (other
Windows versions) display as each USB-1616FS interface is detected. The USB LED blinks and then
remains lit during this enumeration.
It is normal for multiple dialogs to appear when you connect the USB-1616FS for the first time. For
additional information, refer to the "Notes on installing and using the USB-1616FS" that was shipped with
the USB-1616FS.
If you are running Windows XP and connect the USB-1616FS to a USB 1.1 port, a balloon displays the
message "
Your USB device can perform faster if you connect to a USB 2.0 port." You can ignore this
message. The USB-1616FS will function properly when connected to a USB 1.1 port, although USB
bandwidth is limited.
After the USB-1616FS is installed the
USB LED remains lit to indicate that communication is established
between the USB-1616FS and your computer.
If the USB LED turns off
If the USB LED is illuminated but then turns off, the computer has lost communication with the USB1616FS. To restore communication, disconnect the USB cable from the computer, and then reconnect it.
This should restore communication, and the USB LED should turn back on.
2-3
USB-1616FS User's Guide Installing the USB-1616FS
Caution! Do not disconnect any device from the USB bus while the computer is communicating with
the USB-1616FS, or you may lose data and/or your ability to communicate with the USB1616FS.
If your system does not detect the USB-1616FS
If a "
USB device not recognized" message appears when you connect the USB-1616FS, do the following.
1. Unplug the USB cable from the USB-1616FS.
3. Unplug the external power cord from the
4. Plug the external power cord back into the
POWER IN connector on the enclosure.
POWER IN connector.
5. Plug the USB cable back into the USB-1616FS.
Your system should now properly detect the USB-1616FS hardware. Contact technical support if your
system still does not detect the USB-1616FS.
Removing USB-1616FS boards from Windows XP systems
Device Manager may require up to 30 seconds to detect the removal of a USB-1616FS board from a
Windows XP system with Service Pack 1 or Service Pack 2 installed. This time increases with each
additional connected board. If you remove four boards from your system, the time required for Device
Manager to update may be almost two minutes.
If you re-attach the USB-1616FS to your system before Device Manager updates, the USB LED will not
light. Your system will not detect that new hardware is installed until Device Manager first detects that
hardware has been removed.
The InstaCal software will be unresponsive during this re-detection time. Wait until Device Manager
updates with the new hardware before running InstaCal. The USB-1616FS has been detected by the system
when the USB LED on the USB-1616FS is illuminated.
2-4
Chapter 3
Functional Details
Theory of operation - analog input acquisition modes
The USB-1616FS can acquire analog input data in three basic modes – software paced, continuous scan,
and burst scan.
Software paced mode
You can acquire one analog sample at a time in software paced mode. You initiate the A/D conversion by
calling a software command. The analog value is converted to digital data and returned to the computer.
You can repeat this procedure until you have the total number of samples that you want from any one
channel.
The maximum throughput sample rate in software paced mode is about 250 S/s, but may vary depending on
your system.
Continuous scan mode
You can acquire data from up to 16 channels simultaneously in continuous scan mode. The analog data is
continuously acquired, converted to digital values, and written to an on-board FIFO buffer on the USB1616FS until you stop the scan. The FIFO buffer is serviced in blocks as the data is transferred from the
USB-1616FS FIFO buffer to the memory buffer on your computer.
You can acquire data with the USB-1616FS from one channel at 50 kS/s and up to 16 channels at 9.5 kS/s
each. Table 4-1 on page 4-2 lists the throughput rates for 1 to 16 channels. You can start a continuous scan
with either a software command or with an external hardware trigger event.
Burst scan mode
In burst scan mode, you can acquire data with the USB-1616FS using the full capacity of its 32K sample
FIFO. The acquired data is then read from the FIFO and transferred to a user memory buffer on the
computer. You can initiate a single acquisition sequence for any number of input channels by either a
software command or an external hardware trigger.
Burst scans are limited to the depth of the on-board memory, as the data is acquired at a rate faster than it
can be transferred to the computer. The maximum sampling rate is an aggregate rate, where the total
acquisition rate for all channels is 200 kS/s divided by the number of channels. The maximum rate for each
channel is 50 kS/s. The maximum rate that you can acquire data using burst scan mode is 50 kS/s per
channel for one, two, or four channels, and 12.5 kS/s per channel for 16 channels.
3-1
USB-1616FS User's Guide Functional Details
Internal components
Major components on the USB-1616FS are shown in Figure 3-1.
! Two (2) USB connectors
! Two (2) external power connectors
! USB LED
! PWR LED
! Four (4) Screw terminal banks
PWR LED
USB LED
USB
OUT
USB IN
I/O screw terminal connectors
POWER IN
POWER
OUT
I/O screw terminal connectors
USB OUT connector
The USB OUT connector is a downstream hub output port intended for use with other Measurement
Advantage products only. The USB hub is self-powered, and can provide 100 mA maximum current at 5 V.
The USB out connector is labeled
For information on daisy chaining to other Measurement Advantage products, refer to Daisy chaining
additional modules to the USB-1616FS on page 3-7.
USB IN connector
Connect the USB IN connector to the USB port on your computer (or USB hub connected to your
computer). The USB in connector is labeled
Figure 3-1. USB-1616FS module components
USB OUT on the enclosure and on the board.
USB IN on the enclosure and on the board.
3-2
USB-1616FS User's Guide Functional Details
External power connectors
The USB-1616FS has two external power connectors labeled POWER IN and POWER OUT on the
enclosure. The POWER IN connector is labeled IN on the board, and the POWER OUT connector is labeled
OUT on the board.
To supply external power, connect the
POWER IN connector to the supplied +9 V external power supply
(CB-PWR-9V3A).
The
POWER OUT connector lets you power additional daisy chained Measurement Advantage products
from a single external power supply. The C-MAPWR-x cable is available from MCC to connect additional
Measurement Advantage products.
USB LED
The USB LED indicates the communication status of the USB-1616FS. This LED uses up to 5 mA of
current and cannot be disabled. Table 3-1 explains the function of the USB LED.
Table 3-1. USB LED Illumination
USB LED
illumination
Steady green The USB-1616FS is connected to a computer or external USB hub.
Blinks continuously
Indication
Initial communication is established between the USB-1616FS and the computer, or data
is being transferred.
PWR LED
The USB-1616FS incorporates an on-board voltage supervisory circuit that monitors the USB VBUS (5V)
and the external 9 V power supply. If the input voltage falls outside of the specified ranges the PWR LED
shuts off (see Table 3-2).
Table 3-2. PWR LED Illumination
PWR LED
illumination
Steady green USB +5 V power or +9 V external power is supplied to the USB-1616FS.
Off
Indication
Input power is not supplied, or a power fault has occurred. A power fault occurs when the
input power falls outside of the specified voltage range:
USB VBUS (+5 V): 4.75 V to 5.25 V
External power: (+9 V): 6.0 V to 12.5 V
Screw terminal wiring
The USB-1616FS has two rows of screw terminals. Each row has 26 connections. Signal labels are shown
in Figure 3-2.
Figure 3-2. USB-1616FS screw terminals
3-3
USB-1616FS User's Guide Functional Details
The screw terminals provide the following connections:
! eight digital I/O terminals (
! one external digital trigger terminal (
! one power terminal (
! eight ground terminals (
! one external event counter terminal (
! one terminal for external clocking and multi-unit synchronization (
! 16 analog input terminals (
! 16 analog ground terminals (
DIO 0 to DIO 7)
TRIG IN)
5V)
GND 0 to 7)
CTR)
SYNC)
CHANNEL IN 0 to 15)
AGND 0 to 15)
Use 14 AWG to 30 AWG wire for your signal connections.
Caution! Keep the length of stripped wire at a minimum to avoid a short to the enclosure! When
connecting your field wiring to the screw terminals, use the strip gage on the terminal strip, or
strip to 5.5 - 7.0 mm (0.215" to 0.275") long.
Each screw terminal is identified with a label on the board and on the underside of the enclosure lid. Refer
to Table 3-3 for the signal name associated with each board label.
Table 3-3. Board labels and associated signal names
Board label Signal name Board label Signal name
DIO
TRIG IN TRIG IN CTR CTR
5V 5V SYNC SYNC
CHANNEL IN
0 DIO 0 0 GND 0
1 DIO 1 1 GND 1
2 DIO 2 2 GND 2
3 DIO 3 3 GND 3
4 DIO 4 4 GND 4
5 DIO 5 5 GND 5
6 DIO 6 6 GND 6
7 DIO 7
0 CH 0 0 AGND 0
1 CH 1 1 AGND 1
2 CH 2 2 AGND 2
3 CH 3 3 AGND 3
4 CH 3 4 AGND 4
5 CH 4 5 AGND 5
6 CH 5 6 AGND 6
7 CH 6 7 AGND 7
8 CH 8 8 AGND 8
9 CH 9 9 AGND 9
10 CH 10 10 AGND 10
11 CH 11 11 AGND 11
12 CH 12 12 AGND 12
13 CH 13 13 AGND 13
14 CH 14 14 AGND 14
15 CH 15
GND
7 GND 7
AGND
15 AGND 15
Analog input terminals (CH0 IN to CH15 IN)
You can connect up to 16 analog input connections (CH0 IN through CH15 IN) to the screw terminals
labeled
terminals during operation. For example, if you are not using
Channel IN 0-15. We recommend that you connect unused analog input terminals to ground
CH7 IN, connect this terminal to AGND 7.
3-4
USB-1616FS User's Guide Functional Details
Input configuration
All of the analog input channels are configured for single-ended input mode. Each analog signal is
referenced to a signal ground (AGND), and requires two wires:
! The wire carrying the signal to be measured connects to CH# IN.
! The second wire connects to AGND.
The input voltage ranges are ±10 V, ±5 V, ±2.0 V, and ±1.0 V. The following image illustrates a typical
single-ended measurement connection.
CH1 IN
AGND1
Figure 3-3. Single-Ended measurement connection
The following image shows the single-ended measurement data acquired by TracerDAQ's strip chart.
Figure 3-4. TracerDAQ showing single-ended measurement data
For more information on analog signal connections
For more information on single-ended inputs, refer to the Guide to Signal Connections (this document is
available on our web site at www.mccdaq.com/signals/signals.pdf).
Digital I/O terminals (DIO0 to DIO7)
You can connect up to eight digital I/O lines to the screw terminals labeled DIO 0 to DIO 7. You can
configure each digital bit for either input or output. All digital I/O lines are pulled up to USB +5V with a 47
K resistor (default). You can request the factory to configure the resistors for pull-down to ground if
desired.
3-5
USB-1616FS User's Guide Functional Details
When you configure the digital bits for input, you can use the USB-1616FS digital I/O terminals to detect
the state of any TTL-level input. Refer to the switch circuit shown in Figure 3-5 and the schematic shown
in Figure 3-6. If you set the switch to the +5V position, DIO4 reads TRUE (1). If you move the switch to
the GND position, DIO4 reads FALSE (0).
Figure 3-5. Digital connection DIO4 detecting the state of a switch
DIO4
5VGND
Figure 3-6. Schematic showing switch connection to digital channel DIO4
For more information on digital signal connections
For general information regarding digital signal connections and digital I/O techniques, refer to the Guide
to Signal Connections (available on our web site at www.mccdaq.com/signals/signals.pdf).
Power terminals
The +5V terminal (labeled 5V) draws power from either the USB connector VBUS terminal or the external
power supply.
Caution! The +5V terminal is an output. Do not connect to an external power supply or you may
damage the USB-1616FS and possibly the computer.
The maximum amount of +5 V current from the +5 V terminal is limited to 50 mA.
Ground terminals
The USB-1616FS has 16 analog ground connections (AGND 0 to 15) and eight digital ground connections
(
GND 0 to 7). The analog ground connections provide a common ground for the analog input channels. The
ground connections provide a common ground for the
connections.
DIO 0 to DIO 7, TRIG IN, CTR, SYNC and VDC
3-6
USB-1616FS User's Guide Functional Details
Counter terminal
The CTR terminal (CTR) is a TTL level input to a 32-bit event counter. The internal counter increments
when the TTL level transitions from low to high. The counter can count frequencies of up to 1 MHz.
Trigger terminal
The trigger terminal (TRIG IN) is an external digital trigger input. You can configure this terminal with
software for either rising (default) or falling edge.
SYNC terminal
The SYNC terminal is a bidirectional I/O signal that you can use for two purposes:
! Configure as an external clock input to externally clock the A/D conversions. The
supports TTL-level input signals.
! Configure as an output to synchronize with a second USB-1616FS and acquire data from 32 channels.
Refer to the pinout diagram on page 3-4 for the location of this pin. For more information, refer to
"Synchronizing multiple units
" on page 3-11.
SYNC terminal
Daisy chaining additional modules to the USB-1616FS
Daisy chained Measurement Advantage products connect to the USB bus through the high-speed hub on
the USB-1616FS. You can daisy chain a maximum of four Measurement Advantage products to a single
USB 2.0 port on your computer, or a maximum of two devices to a single USB 1.1 port. Use the supplied
cable or an equivalent cable for daisy chaining to additional Measurement Advantage products.
Measurement Advantage products are USB 2.0 full-speed devices that provide a signaling bit rate of
12 Mb/s. The throughput rate is shared by all devices connected to the USB bus.
To daisy-chain two or more USB-1616FS modules, follow the steps below. This procedure assumes you
already have one USB-1616FS connected to a computer and to the external power source. The USB1616FS already connected to the computer is referred to as the connected module. The USB-1616FS you
want to daisy-chain to the connected module is referred to as the new module.
1. Connect the
module.
Power OUT connector on the connected module to the POWER IN connector on the new
2. Connect the
module.
3. For each additional module you want to add, repeat steps 1-2, with the module you just daisy chained
now being the connected module.
A daisy chain system is shown in Figure 3-7.
USB OUT connector on the connected module to the USB IN connector on the new
3-7
USB-1616FS User's Guide Functional Details
USB port to
USB IN
Power OUT to
POWER IN
POWER OUT to
POWER IN
CB-PWR-9V3A
power supply to
POWER IN
Figure 3-7. USB-1616FS daisy-chain connections
USB OUT
to USB IN
USB OUT
to USB IN
Sample rate limitations when using multiple USB-1616FS devices
The maximum sample rate when using multiple USB-1616FS boards is system-dependent. Multiple board
performance is limited by an overall aggregate sample rate. The maximum throughput is in number of
samples taken per second. The rate is irrespective of the number of channels sampled or the number of
boards installed. The maximum sample rate of any one channel is limited to 50 KS/s.
The typical limiting factor for throughput is CPU usage. At maximum system throughput, virtually all
available CPU power is consumed by the USB data transfer. When you run your system close to its
maximum throughput, the amount of CPU power that is available for running other concurrent processes is
limited. Benchmark performance rates are listed in the Specifications chapter on page 4-2.
Power limitations when using multiple USB-1616FS devices
When daisy chaining additional Measurement Advantage products to the USB-1616FS, you must ensure
that you provide adequate power to each board that you connect. The USB-1616FS is powered with a
9 VDC nominal, 3.0 A external power supply.
Voltage drop
A drop in voltage occurs with each board connected in a daisy chain system. The voltage drop between the
power supply input and the daisy chain output is 0.5 V maximum. Factor in this voltage drop when you
configure a daisy chain system to ensure that at least 6.0 VDC is provided to the last board in the chain.
Accuracy
The overall accuracy of any instrument is limited by the error components within the system. Quite often,
resolution is incorrectly used to quantify the performance of a measurement product. While "16-bits" or "1
part in 65536" does indicate what can be resolved, it provides little insight into the quality, or accuracy, of
an absolute measurement. Accuracy specifications describe the actual measurement that can be relied upon
with a USB-1616FS.
There are three types of errors which affect the accuracy of a measurement system:
! offset
! gain
! nonlinearity
The primary error sources in the USB-1616FS are offset and gain. Nonlinearity is small in the USB1616FS, and is not significant as an error source with respect to offset and gain.
3-8
USB-1616FS User's Guide Functional Details
Figure 3-8 shows an ideal, error-free, USB-1616FS transfer function. The typical calibrated accuracy of the
USB-1616FS is range-dependent, as explained in Chapter 4, "Specifications." We use a ±10V range as an
example of what you can expect when performing a measurement in this range.
The accuracy plot in Figure 3-8 is drawn for clarity and is not drawn to scale.
Inp ut Vol ta ge
+10V
Output Code
0
Figure 3-8. Ideal USB-1616FS transfer function
32768
-10V
65535
The USB-1616FS offset error is measured at mid-scale. Ideally, a zero volt input should produce an output
code of 32768. Any deviation from this is an offset error. Figure 3-9 shows the USB-1616FS transfer
function with an offset error. The typical offset error specification for the USB-1616FS on the ±10 V range
is ±1.66 mV. Offset error affects all codes equally by shifting the entire transfer function up or down along
the input voltage axis.
The accuracy plots in Figure 3-9 are drawn for clarity and are not drawn to scale.
Inp u t Volta g e
+10V
Ideal
0
Ac tu al
Offset= 1.66mV
32768
-10V
1.66m V
Figure 3-9. USB-1616FS transfer function with offset error
Output Co de
65535
3-9
USB-1616FS User's Guide Functional Details
V
V
Gain error is a change in the slope of the transfer function from the ideal, and is typically expressed as a
percentage of full-scale. Figure 3-10 shows the USB-1616FS transfer function with gain error. Gain error is
easily converted to voltage by multiplying the full-scale input (±10 V) by the error.
The accuracy plots in Figure 3-10 are drawn for clarity and are not drawn to scale.
Inp ut Vo lt a ge
Id ea l
+10V
0
32768
-10V
Ga in e rro r = + 0. 04% , o r + 4m
Ga in e rro r = -0.0 4%, o r -4 m V
Ac t ua l
Outp ut Cod e
65535
Figure 3-10. USB-1616FS transfer function with gain error
For example, the USB-1616FS exhibits a typical calibrated gain error of ±0.04% on all ranges. For the
±10 V range, this would yield 10 V × ±0.0004 = ±4 mV. This means that at full scale, neglecting the effect
of offset for the moment, the measurement would be within 4 mV of the actual value. Note that gain error
is expressed as a ratio. Values near ±FS (±10 V) are more affected from an absolute voltage standpoint than
are values near mid-scale, which see little or no voltage error.
Combining these two error sources in Figure 3-11, we have a plot of the error band of the USB-1616FS at
±full scale (±10 V). This plot is a graphical version of the typical accuracy specification of the product.
The accuracy plots in Figure 3-11 are drawn for clarity and are not drawn to scale.
Inp ut Volta ge
+10V
1.66m V
0
32768
Ideal +1.66mV + 4m
Ideal
Ideal -(1.66mV + 4mV)
Output Code
65535
Ideal +1.66mV + 4mV
Id e a l -(1. 6 6m V + 4 m V)
Idea l
-10V
Figure 3-11. USB-1616FS error band plot
3-10
USB-1616FS User's Guide Functional Details
Gain queue
The USB-1616FS gain queue allows you to set up a different gain setting for each channel. The gain queue
removes the restriction of having a single gain for all channels. This feature creates a gain list which is
written to local memory on the USB-1616FS. The gain list is made up of a channel number and range
setting. An example of a 16-element list is shown in Table 3-4.
Table 3-4. Sample gain queue list
Element Channel Range
0 CH0 BIP10V
1 CH1 BIP5V
2 CH2 BIP10V
3 CH3 BIP1V
4 CH4 BIP2V
5 CH5 BIP10V
6 CH6 BIP1V
7 CH7 BIP5V
8 CH8 BIP2V
9 CH9 BIP1V
10 CH10 BIP2V
11 CH11 BIP5V
12 CH12 BIP10V
13 CH13 BIP2V
14 CH14 BIP1V
15 CH15 BIP10V
Note that the gain queue must contain 16 elements that include all 16 channels. You must carefully match
the gain to the expected voltage range on the associated channel — otherwise, an over range condition can
occur. Although this condition does not damage the USB-1616FS, it does produce a useless full-scale
reading. It can also introduce a long recovery time due to saturation of the input channel.
Synchronizing multiple units
You can connect the SYNC pin of two USB-1616FS units together in a master/slave configuration and
acquire data synchronously from 32 channels. When the SYNC pin is configured as an output, the internal
A/D pacer clock signal is present at the screw terminal. You can output the A/D pacer clock to the SYNC
pin of a second USB-1616FS configured for A/D pacer input.
You set the function of the SYNC pin (pin 42) for pacer input or pacer output by using InstaCal. By
default, the SYNC pin is set for pacer input. To synchronize a master USB-1616FS with a slave USB1616FS and acquire data from 32 channels, follow the steps below:
1. Run InstaCal.
2. Double-click on the USB-1616FS listing on the
Board Configuration dialog displays.
3. Configure the SYNC pin of the master USB-1616FS for pacer output:
o Double-click on the USB-1616FS that you want to configure as the master. The
Configuration
dialog displays.
PC Board List on the InstaCal main window. The
Board
o Click to select the
Enable Sync output check box and then click OK.
3-11
USB-1616FS User's Guide Functional Details
4. Configure the SYNC pin of the slave USB-1616FS for pacer input:
o Double-click on the USB-1616FS that you want to configure as the slave. The Board
Configuration dialog displays.
o Make sure that the
Enable Sync output check box is not checked (unchecked is the default
setting).
5. Connect the SYNC pin of the master USB-1616FS to the SYNC pin of the slave USB-1616FS.
6. Set the Universal Library
EXTCLOCK option with cbAInScan()/AInScan for the slave USB-1616FS
to enable external pacer clock input.
An example of a master/slave configuration is shown below.
Master
Slave
PMD-1608FS
USB-1616FS
Configure the
SYNC pin
for output
SYNC pin
pin 42
Slave
USB-1616FS
Configure the
SYNC pin
for input
Figure 3-12. Configuring for synchronous data acquisition
Set the Universal Library
EXTCLOCK
cbAInScan()/AInScan()
for the slave USB-1616FS
option with
When you are operating one USB-1616FS, do not set the EXTCLOCK option unless you are using an
external clock for A/D pacing.
3-12
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Analog input section
Parameter Conditions Specification
A/D converters 16-bit, SAR type
Number of channels 16 single-ended
Input configuration Individual A/D per channel
Sampling method Simultaneous
Absolute maximum input
voltage
Input impedance 100 MOhm, min.
Input bandwidth (-3 dB) 50 kHz typ.
Input leakage current ±1 µA typ.
Input capacitance 50 pf typ.
Offset temperature drift 15 ppm/°C typ.
Gain temperature drift All ranges 35 ppm/°C typ.
Input ranges Software selectable ±10 V, ±5 V, ±2 V, ±1 V
CHx IN to GND ±15 V max.
Scan to PC memory 0.6 S/s to 50 kS/s, software programmable Sampling rate
Chapter 4
Burst scan to 32 k
sample FIFO
Throughput
Gain queue
Resolution 16 bits
No missing codes 15 bits
Crosstalk Dc – 25 kHz (sine) -80 dB min.
Calibration voltages
Calibration voltage accuracy
(Note 1)
Temperature sensor range 0 °C to +70 °C max.
Temperature sensor
accuracy
Trigger source Software selectable External digital: TRIG_IN
Note 1: Actual values used for calibration are measured and stored in EEPROM.
Software paced
Scan to PC memory
Burst scan to 32 k
Sample FIFO
±0.5% typ., ±1.0% max.
±3 °C typ.
20 S/s to 50 kS/s, software programmable
30 – 500 S/s all channels (throughput is system
dependant)
See Single board and Multiple board throughput
sections that follow this table.
= (200 kS/s) / (# of channels), max of 50 kS/s for any
channel
Software configurable. Sixteen elements, one gain
element per channel.
0 V, ±0.625 V, ±1.25 V, ±2.5 V, ±5.0 V, software
selectable
4-1
USB-1616FS User's Guide Specifications
Single board throughput
The USB-1616FS has an integral USB hub, which allows up to four USB-1616FS boards to be daisy
chained and connected to a single USB 2.0 port on the host computer. The data shown in Table 4-1 reflects
the throughput that can be expected in single board systems. For details on throughput in systems using
multiple USB-1616FS boards, please refer to the next section, titled "Multiple board throughput."
Table 4-1. Single board throughput: Scan to PC memory
Number of Input Channels Per-channel Throughput (kS/s)
(Note 2)
1 50000
2 50000
3 36000
4 30000
5 25000
6 22000
7 19000
8 17000
9 15000
10 14000
11 12500
12 12000
13 11250
14 10500
15 10000
16 9500
Note 2: The throughput data in Table 4-1 applies to a single USB-1616FS device installation only.
Maximum throughput scanning to PC memory is highly machine dependent.
The rates specified in Table 4-1 are for Windows XP only. The maximum throughput rates on
operating systems that predate Windows XP may be less and must be determined through
testing on your machine.
Multiple board throughput
The USB-1616FS has an integral USB hub, which allows up to four USB-1616FS boards to be daisy
chained and connected to a single USB 2.0 port on the host computer. (The data shown in Table 4-1 reflects
the throughput that can be expected in single board systems.) The transfer of USB-1616FS data over the
USB bus is very CPU intensive. The transfer rate using multiple USB-1616FS boards is both CPU
intensive and system dependent. This makes it impossible for us to provide a guaranteed spec for multiboard maximum sample rate. However, the benchmark performance shown below should serve as a guide
for what you may expect.
Multiple board performance is limited by an overall aggregate sample rate. The maximum throughput will
be in number of samples taken per second irrespective of the number of channels sampled* or number of
boards installed. For example, if the maximum throughput in a system is 150,000 samples per second, you
may sample 20 channels at 7.5 kS/s, 30 channels at 5 kS/s, 40 channels at 3.75 kS/s, etc.
*the maximum sample rate of any one channel is limited to 50 KS/s.
4-2
USB-1616FS User's Guide Specifications
Throughput benchmarks
Throughput System
240 kS/s
240 kS/s 2.4 GHz P4, Phoenix BIOS, Win XP, Service Pack 2, integrated USB EHC port
130 kS/s
220 kS/s
260 kS/s 2.4 GHz, P4 running Win XP, Service Pack 1, using Belkin PCI-bus USB 2.0 card
250 kS/s 2.4 GHz, P4 running Win XP, Service Pack 1, using StarTec PCI-bus USB 2.0 card
2.4 GHz P4 running Win XP, Service Pack 2, using an integrated USB Enhanced Host Controller
(EHC) port
2 GHz, Xeon, Win XP, Service Pack 2, hyperthreading turned OFF, using an integrated USB EHC
port
2 GHz, Xeon, Win XP, Service Pack 2, hyperthreading turned ON, using an integrated USB EHC
port
Usage note
The typical limiting factor on throughput is CPU usage. At maximum system throughput, virtually all
available CPU power will be consumed by the USB data transfer. This is an important note since running
your system close to its maximum throughput will certainly limit the amount of CPU power available for
running other concurrent processes (e.g. plotting or real-time analysis).
Table 4-2. Calibrated absolute accuracy
Range Accuracy (mV)
±10 V ±5.66
±5 V ±2.98
±2 V ±1.31
±1 V ±0.68
Table 4-3. Accuracy components - all values are (±)
Range % of Reading Gain Error at FS (mV) Offset (mV)
±10 V 0.04 4.00 1.66
±5 V 0.04 2.00 0.98
±2 V 0.04 0.80 0.51
±1 V 0.04 0.40 0.28
Table 4-4. Noise performance
Range Typical Counts LSBrms
±10 V 10 1.52
±5 V 10 1.52
±2 V 11 1.67
±1 V 14 2.12
Noise distribution is determined by gathering 50 k samples with analog inputs tied to ground (AGND) at
the user connector. Samples are gathered at the maximum specified sampling rate of 50 kS/s.
4-3
USB-1616FS User's Guide Specifications
Digital input/output
Digital type CMOS
Number of I/O 8 (DIO0 through DIO7)
Configuration Independently configured for input or output
Pull up/pull-down
configuration
Digital I/O transfer rate
(software paced)
Input high voltage 2.0 V min., 5.5 V absolute max.
Input low voltage 0.8 V max., -0.5 V absolute min.
Output high voltage (IOH
= -2.5 mA)
Output low voltage (IOL
= 2.5 mA)
Power on and reset state Input
All pins pulled up to USB VBUS via 47 K resistors (default). Positions available for
pull down to ground (GND). Hardware selectable via zero ohm resistors as a factory
option.
System dependent, 33 to 1000 port reads/writes or single bit reads/writes per second
typ.
3.8 V min.
0.7 V max.
External trigger
Parameter Conditions Specification
Trigger Source (Note
3)
Trigger mode
Trigger latency 10 µs max.
Trigger pulse width 1 µs min
Input high voltage 4.0 V min, 5.5 V absolute max.
Input low voltage 1.0 V max,-0.5 V min
Input leakage
current
Note 3: TRIG_IN is a Schmitt trigger input protected with a 1.5 k Ohm series resistor.
External digital TRIG_IN
Software
selectable
±1.0µA
Edge Sensitive: user configurable for CMOS compatible rising
(default) or falling edge.
External clock input/output
Parameter Conditions Specification
Pin name SYNC
Pin type Bidirectional
Software selectable
direction
Input Clock Rate 50kHz, maximum
Input leakage current ±1.0 µA
Input high voltage 4.0V min., 5.5V absolute max.
Input low voltage 1.0V max., -0.5V absolute min.
Output high voltage (Note
4)
Output low voltage (Note
4)
Output Outputs internal A/D pacer clock.
Input
Input 1µs min. Clock pulse width
Output 5µs min.
IOH = -
2.5mA
No load 3.8V min.
IOL = 2.5mA 1.1V max.
No load 0.6V max.
Receives A/D pacer clock from external source. Rising edge
sensitive.
3.3V min.
4-4
USB-1616FS User's Guide Specifications
Note 4: SYNC is a Schmitt trigger input and is over-current protected with a 200 Ohm series resistor.
Counter section
Pin name CTR
Counter type Event counter
Number of channels 1
Resolution 32 bits
Counter Read – System dependent, 33 to 1000 reads per second. Counter/timer read/write rates (software paced)
Counter Clear – System-dependent, 33 to 1000 writes per second.
Schmidt trigger hysteresis 20 mV to 100 mV
Input leakage current ± 1 µA
Maximum input frequency 1 MHz
High pulse width 500 ns min.
Low pulse width 500 ns min.
Input low voltage 1.0 V min., -0.5 V max.
Input high voltage 4.0 V min., 5.5 V max.
Memory
Data FIFO 32,768 samples, 65,536 bytes
EEPROM 1,024 bytes
EEPROM configuration
Address range Access Description
0x000-0x07F Reserved 128 bytes system data
0x080-0x1FF Read/Write 384 bytes calibration data
0x200-0x3FF Read/Write 512 bytes user area
Microcontroller
Type High performance 8-bit RISC microcontroller
Program memory 16,384 words
Data memory 2,048 bytes
Power
Parameter Conditions Specification
Supply current USB enumeration <100 mA
Supply current (Note 5) Continuous mode 350 mA typ.
User +5 V output voltage range (Note 6) Available at terminal block pin 48 4.0 V min.
5.25 V max.
User +5V output current
(Note 7)
Note 5: This is the total current requirement for the USB-1616FS which includes up to 10mA for the
status LED’s.
Note 6:
Note 7: This refers to the total amount of current that can be sourced from the 5 V screw terminal (pin
Output voltage range assumes input power supply voltage is within specified limits
48) for general use. This spec includes any additional contribution due to DIO loading.
Available at terminal block pin 48 50 mA max.
4-5
USB-1616FS User's Guide Specifications
USB +5 V voltage
Parameter Conditions Specification
USB +5V (VBUS) input voltage range. 4.75 V min. to 5.25 V max.
External power input
Parameter Conditions Specification
External power input
Voltage supervisor limits - PWR
LED. (Note 8)
External power adapter (included) MCC p/n CB-PWR-9V3A +9 V ±10%, @ 3 A
Note 8: The USB-1616FS monitors the external +9 V power supply voltage with a voltage supervisory
6.0 V > Vext or Vext >
12.5 V
6.0 V < Vext < 12.5 V PWR LED = On
+6.0 VDC to 12.5 VDC (9 VDC power
supply included).
PWR LED = Off (power fault)
circuit. If this power supply exceeds its specified limit, the PWR LED will turn off indicating a
power fault condition.
External power output
Parameter Conditions Specification
External power output - current
range
External power output
Compatible cable(s) for daisy chain C-MAPWR-x
Note 9: The daisy chain power output option allows multiple Measurement Advantage boards to be
Note 9 4.0 A max.
Voltage drop between power input and daisy chain
power output
0.5 V max
X = 2, 3 or 6
feet
powered from a single external power source in a daisy chain fashion. The voltage drop
between the module power supply input and the daisy chain output is 0.5 V max. Users must
plan for this drop to assure the last module in the chain will receive at least 6.0 VDC
USB specifications
USB "B" connector Input
USB device type USB 2.0 (full-speed)
Use of multiple USB-1616FS boards requires a USB 2.0 hub.
Device compatibility USB 1.1, USB 2.0
USB "A" connector Downstream hub output port
Supports USB 2.0 high-speed, full-speed and low-speed operating points. USB hub type
Self-powered, 100 mA max downstream VBUS capability
Compatible products MCC Measurement Advantage Series
USB cable type (upstream and
downstream)
USB cable length 3 meters max.
A-B cable, UL type AWM 2527 or equivalent. (min 24 AWG VBUS/GND,
min 28 AWG D+/D-)
Environmental
Operating temperature range 0 to 70 ° C
Storage temperature range -40 to 85 ° C
Humidity 0 to 90% non-condensing
4-6
USB-1616FS User's Guide Specifications
Mechanical
203.2 mm (L) x 121.9 mm (W) x 20.0 mm (H) Card dimensions
8.0" (L) x 4.8" (W) x 0.8" (H)
208.3 mm (L) x 129.6 mm (W) x 40.6 mm (H) Enclosure dimensions
8.2" (L) x 5.2" (W)x 1.6" (H)
Screw terminal connector type
Connector type Screw terminal
Wire gauge range 14 AWG to 30 AWG
Screw terminal pin out
Board label Signal name Board label Signal name
DIO
TRIG IN TRIG IN CTR CTR
5V 5V SYNC SYNC
CHANNEL IN 0 CH 0 AGND 0 AGND 0
1 CH 1 1 AGND 1
2 CH 2 2 AGND 2
3 CH 3 3 AGND 3
4 CH 3 4 AGND 4
5 CH 4 5 AGND 5
6 CH 5 6 AGND 6
7 CH 6 7 AGND 7
8 CH 8 8 AGND 8
9 CH 9 9 AGND 9
10 CH 10 10 AGND 10
11 CH 11 11 AGND 11
12 CH 12 12 AGND 12
13 CH 13 13 AGND 13
14 CH 14 14 AGND 14
15 CH 15 15 AGND 15
0 DIO 0 0 GND 0
1 DIO 1 1 GND 1
2 DIO 2 2 GND 2
3 DIO 3 3 GND 3
4 DIO 4 4 GND 4
5 DIO 5 5 GND 5
6 DIO 6 6 GND 6
7 DIO 7
GND
7 GND 7
4-7
Declaration of Conformity
Manufacturer: Measurement Computing Corporation
Address: 16 Commerce Boulevard
Middleboro, MA 02346
USA
Category: Electrical equipment for measurement, control and laboratory use.
Measurement Computing Corporation declares under sole responsibility that the product
USB-1616FS
to which this declaration relates is in conformity with the relevant provisions of the following standards
or other documents:
EU EMC Directive 89/336/EEC: Electromagnetic Compatibility, EN 61326 (1997) Amendment 1
(1998)
Emissions: Group 1, Class A
! EN 55011 (1998)/CISPR 11: Radiated and Conducted emissions.
Immunity: EN61326, Annex A
! EN 61000-4-2 (1995): Electrostatic Discharge immunity, Criteria C.
! EN 61000-4-3 (1997): Radiated Electromagnetic Field immunity Criteria C.
! EN 61000-4-4 (1995): Electric Fast Transient Burst immunity Criteria A.
! EN 61000-4-5 (1995): Surge immunity Criteria C.
! EN 61000-4-6 (1996): Radio Frequency Common Mode immunity Criteria A.
! EN 61000-4-8 (1994): Radio Frequency Common Mode immunity Criteria A.
! EN 61000-4-11 (1994): Voltage Dip and Interrupt immunity Criteria A.
Declaration of Conformity based on tests conducted by Chomerics Test Services, Woburn, MA 01801,
USA in February, 2005. Test records are outlined in Chomerics Test Report #EMI4133.05.
We hereby declare that the equipment specified conforms to the above Directives and Standards.
Carl Haapaoja, Vice-President of Design Verification
Measurement Computing Corporation
16 Commerce Boulevard,
Middleboro, Massachusetts 02346
(508) 946-5100
Fax: (508) 946-9500
E-mail: info@mccdaq.com
www.mccdaq.com
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