Measurement Computing USB-1408FS-Plus-OEM User manual

USB-1408FS-Plus-OEM
Analog and Digital I/O
Document Revision 2A
January 2015
©Copyright 2015
User's Guide

HM USB-1408FS-Plus-OEM
Trademark and Copyright Information
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Other product and company namesmentioned herein are trademarks or trade names of their respective
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©2015 MeasurementComputingCorporation. All rights reserved. No part of this publicationmay be
reproduced, stored in a retrieval system, or transmitted, in any form by any means, electronic,mechanical, by
photocopying, recording, or otherwise without the prior written permission of Measurement Computing
Corporation.
Notice
Measurement Computing Corporation does not authorize any Measurement Computing Corporation product for
use in life support systems and/or devices without prior written consent from Measurement Computing
Corporation. Life support devices/systems are devices or systems that, a) are intended for surgical implantation
into the body, or b) support or sustain life and whose failure to perform can be reasonably expected to result in
injury. Measurement Computing Corporation products are not designed with the components required, and are
not subject to the testing required to ensure a level of reliability suitable for the treatment and diagnosis of
people.

3
Table of Contents
Preface
About this User's Guide ....................................................................................................................... 5
What you will learn from this user's guide .........................................................................................................5
Conventions in this user's guide .........................................................................................................................5
Where to find more information.........................................................................................................................5
Chapter 1
Introducing the USB-1408FS-Plus-OEM ............................................................................................. 6
Functional block diagram...................................................................................................................................6
Chapter 2
Installing the USB-1408FS-Plus-OEM ................................................................................................. 7
Unpacking...........................................................................................................................................................7
Downloading the software..................................................................................................................................7
Installing the hardware .......................................................................................................................................7
Installing on a Windows platform..................................................................................................................................... 7
Calibrating the hardware.....................................................................................................................................7
Chapter 3
Functional Details ................................................................................................................................. 8
Analog input acquisition modes .........................................................................................................................8
Software paced.................................................................................................................................................................. 8
Hardware paced ................................................................................................................................................................ 8
Board components..............................................................................................................................................9
USB connector.................................................................................................................................................................. 9
LED .................................................................................................................................................................................. 9
Header connectors............................................................................................................................................................. 9
Differential mode pinout..................................................................................................................................................10
Single-ended mode pinout ...............................................................................................................................................10
Signal connections............................................................................................................................................11
Analog input....................................................................................................................................................................11
Analog output ..................................................................................................................................................................13
Digital I/O........................................................................................................................................................................14
Counter input...................................................................................................................................................................15
External trigger input.......................................................................................................................................................15
SYNC I/O ........................................................................................................................................................................15
Power output....................................................................................................................................................................15
Ground.............................................................................................................................................................................15
Accuracy...........................................................................................................................................................15
Synchronized operations...................................................................................................................................17
Power................................................................................................................................................................18
Mechanical drawings........................................................................................................................................18
Chapter 4
Specifications ...................................................................................................................................... 19
Analog input .....................................................................................................................................................19
Accuracy..........................................................................................................................................................................20
Noise performance...........................................................................................................................................................20
Analog output ...................................................................................................................................................20
Digital input/output...........................................................................................................................................21
External trigger.................................................................................................................................................22
External clock input/output...............................................................................................................................22
Counter.............................................................................................................................................................23

USB-1408FS-Plus-OEM User's Guide
4
Memory ............................................................................................................................................................23
Microcontroller.................................................................................................................................................23
Power................................................................................................................................................................23
General .............................................................................................................................................................24
Environmental ..................................................................................................................................................24
Mechanical .......................................................................................................................................................24
Header connector..............................................................................................................................................24
Differential mode.............................................................................................................................................................25
Single-ended mode ..........................................................................................................................................................25

5
Preface
About this User's Guide
What you will learn from this user's guide
This user's guide describes the Measurement Computing USB-1408FS-Plus-OEM data acquisition device and
lists device specifications.
Conventions in this user's guide
For more information
Text presented in a box signifies additional information and helpful hints related to the subject matter.
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 a screen, such as buttons, text boxes, and check boxes.
italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase.
Where to find more information
Additional information about USB-1408FS-Plus-OEM hardware is available on our website at
www.mccdaq.com. You can also contact Measurement Computing Corporation with specific questions.
Knowledgebase: kb.mccdaq.com
Tech support form: www.mccdaq.com/support/support_form.aspx
Email: [e-mail]
Phone: [phone] and follow the instructions for reaching Tech Support
For international customers, contact your local distributor. Refer to the International Distributors section on our
website at www.mccdaq.com/International.

6
Chapter 1
Introducing the USB-1408FS-Plus-OEM
The USB-1408FS-Plus-OEM is a USB 2.0 full-speed analog input and digital I/O data acquisition device that
provides the following features:
Eight analog input channels that are software-selectable for either eight 13-bit single-ended inputs or four
14-bit differential inputs
Two 12-bit analog output channels
16 digital I/O channels that are independently-selectable as input or output in two 8-bit ports
32-bit event counter input for counting TTL pulses
External digital trigger input
Bidirectional external clock for synchronous operation with more than one device.
Two header connectors for field wiring connections
The USB-1408FS-Plus-OEM device is compatible with both USB 1.1 and USB 2.0 ports. The speed of the
device may be limited when using a USB 1.1 port due to the difference in transfer rates on the USB 1.1 versions
of the protocol (low-speed and full-speed).
The device is powered by the +5 V USB supply from the computer. No external power is required.
Caution! There are no product safety, electromagnetic compatibility (EMC), or CE marking compliance
claims made for the USB-1408FS-Plus-OEM. The USB-1408FS-Plus-OEM is intended for use as
a component of a larger system. MCC can help developers meet their compliance requirements.
The end product supplier, however, is responsible for conforming to any and all compliance
requirements.
Functional block diagram
Device functions are illustrated in the block diagram shown here.
Figure 1. USB-1408FS-Plus-OEM functional block diagram

7
Chapter 2
Installing the USB-1408FS-Plus-OEM
Unpacking
As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the board 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.
Downloading the software
Refer to the USB-1408FS-Plus-OEM product page on the Measurement Computing website for information
about the supported software you can download.
Install the software before you install the hardware
The driver needed to run the device is installed when you install the software. Therefore, you need to install the
software package you plan to use before you install the hardware.
Installing the hardware
Installing on a Windows platform
Connect the USB-1408FS-Plus-OEM to a to an available USB port on the computer running Windows, connect
the USB cable to an available USB port on the computer or to an external USB hub connected to the computer.
Connect the other end of the cable to the USB connector on the device. No external power is required.
When connected for the first time, a Found New Hardware dialog opens when the operating system detects the
device. When the dialog closes, the installation is complete. The device LED turns on after the device is
successfully installed.
If the LED turns off
If communication is lost between the device and the computer, the LED turns off. To restore communication,
disconnect the USB cable from the computer and then reconnect it. This should restore communication, and the
LED should turn on.
Calibrating the hardware
The Measurement Computing Manufacturing Test department performs the initial factory calibration. Return
the device to Measurement Computing Corporation when calibration is required. The recommended calibration
interval is one year.
The USB-1408FS-Plus-OEM does not support field calibration.

8
Chapter 3
Functional Details
Analog input acquisition modes
The USB-1408FS-Plus-OEM can acquire analog input data in either software paced or hardware paced mode.
Software paced
The USB-1408FS-Plus-OEM acquires data one analog sample at a time using software paced mode. You
initiate the A/D conversion by calling a software command. The analog value is converted to digital and
returned to the computer. You can repeat this procedure until you have the total number of samples that you
want.
The maximum sample rate in software-paced mode is system-dependent.
Hardware paced
The USB-1408FS-Plus-OEM can acquire data from up to eight channels using hardware-paced mode. The
analog data is acquired and converted to digital values until you stop the scan. Data is transferred in blocks of
32 samples from the device to the memory buffer on your computer.
The A/D converter is paced by either an internal or external clock source.
The maximum sample rate is an aggregate rate. The total sample rate for all channels cannot exceed 50 kS/s.
The following table lists the sample rate when scanning from one to eight channels.
Maximum per channel sample rate
# channels
scanned
Sample rate
(kS/s)
1 48
2 24
3 16
4 12
5 9.60
6 8
7 6.85
8 6
You can start a hardware-paced scan with a software command. Optionally, hardware-paced scans can be
delayed by an external hardware trigger event.

USB-1408FS-Plus-OEM User's Guide Functional Details
9
Board components
The board components – header connectors, LED, and USB connector – are shown in Figure 2.
1 Header connector pins 21 to 40 3 USB connector
2 LED 4 Header connector pins 1 to 20
Figure 2. Board components
USB connector
Receives the supplied USB cable. When connected to a computer or USB hub, the cable provides power and
communication. No external power supply is required.
LED
The following table lists the behavior of the device LED.
LED state Indication
Steady green The device is connected to a computer or external USB hub.
Blinks continuously Data is being transferred.
Header connectors
The header connectors provide the following connections:
Eight analog input connections (CH0 IN to CH7 IN, CH0 IN HI/LO through CH3 IN HI/LO)
Two analog output connections (D/A OUT 0 to D/A OUT 1)
16 digital I/O connections (PortA0 to Port A7, and Port B0 to Port B7)
External trigger input (TRIG_IN)
External counter input (CTR)
Bidirectional terminal for external clocking or multi-unit synchronization (SYNC)
Power output (+VO)
Analog ground (AGND) and ground (GND)
The differential and single-ended mode pinouts are shown in the following tables.

USB-1408FS-Plus-OEM User's Guide Functional Details
10
Differential mode pinout
Four-channel differential mode pinout
Pin Signal name Pin description Pin Signal name Pin description
1 CH0 IN HI Analog input 0+ 21 Port A0 Port A bit 0
2 CH0 IN LO Analog input 0– 22 Port A1 Port A bit 1
3 AGND Analog ground 23 Port A2 Port A bit 2
4 CH1 IN HI Analog input 1+ 24 Port A3 Port A bit 3
5 CH1 IN LO Analog input 1– 25 Port A4 Port A bit 4
6 AGND Analog ground 26 Port A5 Port A bit 5
7 CH2 IN HI Analog input 2+ 27 Port A6 Port A bit 6
8 CH2 IN LO Analog input 2– 28 Port A7 Port A bit 7
9 AGND Analog ground 29 GND Ground
10 CH3 IN HI Analog input 3+ 30 +VO Power output
11 CH3 IN LO Analog input 3– 31 GND Ground
12 AGND Analog ground 32 Port B0 Port B bit 0
13 D/A OUT 0 Analog output 0 33 Port B1 Port B bit 1
14 D/A OUT 1 Analog output 1 34 Port B2 Port B bit 2
15 AGND Analog ground 35 Port B3 Port B bit 3
16 Reserved Reserved for future use 36 Port B4 Port B bit 4
17 GND Ground 37 Port B5 Port B bit 5
18 TRIG_IN Trigger input 38 Port B6 Port B bit 6
19 SYNC Synchronization I/O 39 Port B7 Port B bit 7
20 CTR Counter input 40 GND Ground
USB connector
Single-ended mode pinout
Eight-channel single-ended mode pinout
Pin Signal name Pin description Pin Signal name Pin description
1 CH0 IN Analog input 0 21 Port A0 Port A bit 0
2 CH1 IN Analog input 1 22 Port A1 Port A bit 1
3 AGND Analog ground 23 Port A2 Port A bit 2
4 CH2 IN Analog input 2 24 Port A3 Port A bit 3
5 CH3 IN Analog input 3 25 Port A4 Port A bit 4
6 AGND Analog ground 26 Port A5 Port A bit 5
7 CH4 IN Analog input 4 27 Port A6 Port A bit 6
8 CH5 IN Analog input 5 28 Port A7 Port A bit 7
9 AGND Analog ground 29 GND Ground
10 CH6 IN Analog input 6 30 +VO Power output
11 CH7 IN Analog input 7 31 GND Ground
12 AGND Analog ground 32 Port B0 Port B bit 0
13 D/A OUT 0 Analog output 0 33 Port B1 Port B bit 1
14 D/A OUT 1 Analog output 1 34 Port B2 Port B bit 2
15 AGND Analog ground 35 Port B3 Port B bit 3
16 Reserved Reserved for future use 36 Port B4 Port B bit 4
17 GND Ground 37 Port B5 Port B bit 5
18 TRIG_IN Trigger input 38 Port B6 Port B bit 6
19 SYNC Synchronization I/O 39 Port B7 Port B bit 7
20 CTR Counter input 40 GND Ground
USB connector