Acces I/O products USB-DIO-48 User manual

10623 Roselle Street, San Diego, CA 92121 • [phone] • FAX [phone]
[email protected] • www.accesio.com
MODEL USB-DIO-48
USB 48 CHANNEL DIGITAL
INPUT/OUTPUT MODULE
USER MANUAL
FILE: MUSB-DIO-48.A1j

Manual USB-DIO-482
Notice
The information in this document is provided for reference only. ACCES does not assume any liability arising
out of the application or use of the information or products described herein. This document may contain or
reference information and products protected by copyrights or patents and does not convey any license under
the patent rights of ACCES, nor the rights of others.
IBM PC, PC/XT, and PC/AT are registered trademarks of the International Business Machines Corporation.
Printed in USA. Copyright 2009 by ACCES I/O Products Inc, 10623 Roselle Street, San Diego, CA 92121. All
rights reserved.
WARNING!!
ALWAYS CONNECT AND DISCONNECT YOUR FIELD CABLING WITH
THE COMPUTER POWER OFF. ALWAYS TURN COMPUTER POWER OFF
BEFORE INSTALLING A CARD. CONNECTING AND DISCONNECTING
CABLES, OR INSTALLING CARDS INTO A SYSTEM WITH THE
COMPUTER OR FIELD POWER ON MAY CAUSE DAMAGE TO THE I/O
CARD AND WILL VOID ALL WARRANTIES, IMPLIED OR EXPRESSED.

Manual USB-DIO-483
Warranty
Prior to shipment, ACCES equipment is thoroughly inspected and tested to applicable specifications.
However, should equipment failure occur, ACCES assures its customers that prompt service and support will
be available. All equipment originally manufactured by ACCES which is found to be defective will be repaired
or replaced subject to the following considerations.
Terms and Conditions
If a unit is suspected of failure, contact ACCES' Customer Service department. Be prepared to give the unit
model number, serial number, and a description of the failure symptom(s). We may suggest some simple
tests to confirm the failure. We will assign a Return Material Authorization (RMA) number which must appear
on the outer label of the return package. All units/components should be properly packed for handling and
returned with freight prepaid to the ACCES designated Service Center, and will be returned to the
customer's/user's site freight prepaid and invoiced.
Coverage
First Three Years: Returned unit/part will be repaired and/or replaced at ACCES option with no charge for
labor or parts not excluded by warranty. Warranty commences with equipment shipment.
Following Years: Throughout your equipment's lifetime, ACCES stands ready to provide on-site or in-plant
service at reasonable rates similar to those of other manufacturers in the industry.
Equipment Not Manufactured by ACCES
Equipment provided but not manufactured by ACCES is warranted and will be repaired according to the terms
and conditions of the respective equipment manufacturer's warranty.
General
Under this Warranty, liability of ACCES is limited to replacing, repairing or issuing credit (at ACCES
discretion) for any products which are proved to be defective during the warranty period. In no case is ACCES
liable for consequential or special damage arriving from use or misuse of our product. The customer is
responsible for all charges caused by modifications or additions to ACCES equipment not approved in writing
by ACCES or, if in ACCES opinion the equipment has been subjected to abnormal use. "Abnormal use" for
purposes of this warranty is defined as any use to which the equipment is exposed other than that use
specified or intended as evidenced by purchase or sales representation. Other than the above, no other
warranty, expressed or implied, shall apply to any and all such equipment furnished or sold by ACCES.

Manual USB-DIO-484
Table of Contents
Chapter 1: Introduction ......................................................................................................5
Features ...........................................................................................................................5
Applications.....................................................................................................................5
Functional Description ...................................................................................................6
Figure 1-1: Block Diagram ..........................................................................................7
Ordering Guide................................................................................................................7
Model Options .................................................................................................................7
Special Order...................................................................................................................7
Included with your board................................................................................................8
Optional Accessories......................................................................................................8
Figure 1-2: Enclosure Label........................................................................................9
Chapter 2: Installation ......................................................................................................10
Software CD Installation ...............................................................................................10
Hardware Installation ....................................................................................................10
Chapter 3: Hardware Details ............................................................................................11
Option Selections..........................................................................................................11
Figure 3-1: 48 Channel Board Option Selection Map .............................................11
Figure 3-2: 48 Channel OEM Board with Right Angle Headers Map .....................11
USB Connector..............................................................................................................12
Embedded USB Connector ..........................................................................................12
LED .................................................................................................................................12
DC Power Jack (Optional) ............................................................................................12
-ST Screw Terminals for High Retention Ext. Power..................................................12
50 Pin Box Headers.......................................................................................................12
5V Resettable Fused Outputs ......................................................................................12
Pull-Up / Pull-Down Configuration Jumpers...............................................................12
Chapter 4: USB Address Information..............................................................................13
Chapter 5: Programming..................................................................................................14
unsigned long DIO_Configure(DeviceIndex, bTristate, pOutMask, pData) ..............14
unsigned long DIO_WriteAll(DeviceIndex,pData).......................................................14
unsigned long DIO_ReadAll(DeviceIndex,Buffer) ......................................................14
Chapter 6: Connector Pin Assignments .........................................................................15
Table 6-1: 50-Pin Connector Pin Assignments .......................................................15
Chapter 7: Specifications.................................................................................................16
Customer Comments........................................................................................................17

Manual USB-DIO-485
Chapter 1: Introduction
Features
• 48 lines of digital I/O
• High-speed USB 2.0 device, USB 1.1 backwards compatible
• Six (6) 8-bit ports independently selectable for inputs or outputs
• All I/O lines buffered with 32 mA source, 64mA sink current capabilities
• I/O buffers can be enabled or tri-stated under program control
• Drivers and sample application provided
• Jumper selectable I/O pulled up to 5V (via 10KΩ), pulled down to ground or floating
• Jumper selectable power provided via USB cable or external power supply for higher
current sourcing capabilities
• Resettable fused +5VDC output per I/O connector
• Standard 50-pin IDC-type shrouded connectors with key
• PC/104 size board (3.550 by 3.775 in.)
• Rugged industrial enclosure
• Compatible with Industry-Standard I/O Racks such as Gordos, OPTO22, Potter &
Brumfield, etc.
Applications
• Automatic Test Systems
• Laboratory Automation
• Robotics
• Machine Control
• Security Systems, Energy Management
• Relay Monitoring and Control
• Parallel Data Transfer to PC
• Sensing Switch Closures or TTL, DTL, CMOS Logic
• Driving Indicator Lights or Recorders

Manual USB-DIO-486
Functional Description
This USB board is an ideal solution for adding portable, easy-to-install digital I/O capabilities
to any computer with a USB port. The board is a USB 2.0 high speed device, offering the
fastest speed available with the USB bus. It is fully compatible with both USB 1.1 and USB
2.0 ports. The card is plug-and-play allowing quick connect/disconnect whenever you need
additional I/O on your USB port.
The board features 48 bits of TTL-compatible digital I/O with high-current capabilities. Each
digital port can be programmed to accept inputs or to drive outputs in 6 groups of 8-bit ports.
Power is supplied to the card via the USB cable or for higher current capabilities, external
power may be used. The I/O wiring connections are via two industry standard 50-pin
connectors. For external circuits, fused +5VDC power is available at each I/O connector on
pin 49. There is one resettable fuse per connector. The resettable fuses are rated at 0.5A.
All I/O lines are buffered by a type 74ABT543A tristate buffer transceiver capable of
sourcing 32 mA or sinking 64 mA. The buffers are configured under program control for
input or output.
I/O Lines are jumper selectable with pull-ups (to +5 VDC via 10KΩ) or with pull-downs (to
ground).
Unlike most USB digital I/O products which primarily use a human interface device (HID)
driver, we provide an easy to use, Windows-based, custom function driver optimized for
maximum data throughput. This approach exposes the full functionality of the hardware
along with maximizing the advantage of using the high-speed USB 2.0 bus.
Power is supplied to the card via the USB cable or for higher current capabilities, external
power may be used. Complimenting the high-retention USB type B connector (quickly
recognized by the orange insulator) is a factory option for a high-retention external power
screw terminal pair.

Manual USB-DIO-487
Figure 1-1: Block Diagram
Ordering Guide
USB-DIO-48 USB 48-channel digital input/output module
Model Options
•-OEM Board only version with no enclosure
•-RA Right angle headers (USB-DIO-48-OEM only)
•-DIN DIN rail mounting bracket for integrating into existing DIN rail systems
-PR On-board DC power circuitry and external regulated AC/DC (5V) adapter
-ST Ext. pwr components & screw term’s for reg. 5V pwr input (high retention)
•-RoHS This product is available in a RoHS compliant version. Please call for specific
pricing then be sure to add this suffix to the model number on any hard-copy
or verbal purchase orders.
Special Order
Contact factory with your special requirement. Examples of special orders would be
conformal coating, latching I/O headers.

Manual USB-DIO-488
Included with your board
The following components are included with your shipment, depending on options ordered.
Please take the time now to ensure that no items are damaged or missing.
•USB Module in labeled enclosure with an anti-skid bottom
•6' USB 2.0 cable
•Software Master CD
•USB I/O Quick-Start Guide
Optional Accessories
•CUSB-EMB-X USB Type A to micro-fit OEM header, X=1
for 1’ cable, 6 for 6’ cable
•CAB50F-6 Six-foot ribbon cable assembly with
50-pin female connectors
•CAB50-6
Six-foot ribbon cable assembly with
a 50-pin female header connector
and a 50-pin female edge connector
•STB-50
Screw terminal board, typically ships
with standoffs but can also mount on
SNAP-TRACK or DIN-SNAP
•STB-48CH
50-Pin Multi-Header Universal Screw
Terminal Board with steel powder coated
enclosure for up to 48 Digital I/O Channels
•IIB-24 24-Channel Optically Isolated Input Board
•ROB-24 24-Channel Electromechanical Relay Board
•DIN-SNAP-6
Six inch length of SNAP-TRACK with
two clips, for mounting one STB-50
screw terminal board on a DIN rail
•DIN-SNAP
One foot length of SNAP-TRACK with
four clips, for mounting up to two STB-50
screw terminal boards on a DIN rail
•MP104-DIN DIN-rail mounting adapter plate for
affixing any USB/104 module to a DIN-rail

Manual USB-DIO-489
Figure 1-2: Enclosure Label

Manual USB-DIO-4810
Chapter 2: Installation
Software CD Installation
The software provided with this board is contained on one CD and must be installed onto
your hard disk prior to use. To do this, perform the following steps as appropriate for your
software format and operating system. Substitute the appropriate drive letter for your CD-
ROM or disk drive where you see B in the examples below.
WIN NT/2000/XP/2003
a. Place the CD into your CD-ROM drive.
b. The install program should automatically run. If it does not click START | RUN and
type BGLQR?JJ, click OK or press -.
c. Follow the on-screen prompts to install the software for this board.
Hardware Installation
The board can be installed in any USB 2.0 or USB 1.1 port. Please refer to the USB I/O
Quick Start Guide which can be found on the CD, for specific, quick steps to complete the
hardware and software installation.

Manual USB-DIO-4811
Chapter 3: Hardware Details
Option Selections
Refer to the setup programs on the CD provided with the board. Also, refer to the Block
Diagram and the Option Selection Map when reading this section of the manual.
There are two primary versions of this board, each has an option selection map.
Figure 3-1: 48 Channel Board Option Selection Map
Figure 3-2: 48 Channel OEM Board with Right Angle Headers Map

Manual USB-DIO-4812
USB Connector
The USB connector is a Type B high-retention type connector and mates with the cable
provided. The USB port provides communication signals along with +5 VDC power. The
board can be powered from the USB port or, if needed for higher source current
applications, an external power supply can be used.
Embedded USB Connector
Micro 5-pin header provides embedded devices with a compact USB interface.
LED
The LED on the front of the enclosure is used to indicate power and data transmissions.
When the LED is in an illuminated steady green state, this signifies that the board is
successfully connected to the computer and has been detected and configured by the
operating system. A continuously flashing LED signifies transmitted data over the USB.
DC Power Jack (Optional)
For high current applications when current sourced on outputs is anticipated to output more
than a USB port can provide (typically 500 mA). The DC jack has a 2.00mm post and is
designed to be used with the AC/DC regulated 5V external power supply shipped with this
option. To configure for use, switch the jumper located near the USB connector to VEXT
(please consult the option selection map for a visual reference).
-ST Screw Terminals for High Retention Ext. Power
Specify “-ST” when ordering the OEM version of this board to connect external power via
secure screw terminals instead of a non-retained DC jack. Strip your wires approximately
4mm and tin, then tighten the regulated +5 VDC source leads into the labeled terminals.
50 Pin Box Headers
The 50 pin box headers have standard 0.100" spacing between pins and are keyed to
prevent improper connections. It can be used with standard IDC type ribbon cables.
5V Resettable Fused Outputs
Two 0.5A resettable fuses each feed two I/O connectors at pin 49 used to power external
module racks or relay boards and such. If an over-current persists on a circuit protected by
a resettable fuse, it will open interrupting power to the circuit. Response time depends on
over-current level and ambient temperature, humidity, etc. The fuse will remain open until
the bi-metal elements cool sufficiently, at which time the circuit will be restored.
Pull-Up / Pull-Down Configuration Jumpers
One configuration jumper controls connector group 0 and another configuration jumper
controls connector group 1. The I/O lines are either pulled up to +5V via 10KΩ(for dry-
contact monitoring) or pulled down (for positive control logic applications). When no
jumpers are installed, the lines are left floating, however due to the 10K resistor packs any
un-used input will not have suppressed cross-talk. For pull-ups (most common), install these
jumpers in the +5V position. For pull-downs, install these jumpers in the GND position. For
neither, remove these jumpers.

Manual USB-DIO-4813
Chapter 4: USB Address Information
Use the provided driver to access the USB board. This driver will allow you to determine
how many supported USB devices are currently installed, and each device type. This
information is returned as a Vendor ID (VID), Product ID (PID) and Device Index.
The VID is “0x1605" and the 48 bit board PID is “0x8002”.
The Device Index is determined by how many of the devices you have in your system, and
provides a unique identifier allowing you to access a specific board.

Manual USB-DIO-4814
Chapter 5: Programming
The driver software provided with the board uses a 32-bit .dll front end compatible with any
Windows programming language. Samples provided in Borland C++Builder, Borland Delphi,
Microsoft Visual Basic, and Microsoft Visual C++ demonstrate the use of the driver.
The following is a list of the most common function calls provided by the driver in Windows.
For a complete list of available functions and details on how to use them refer to the USB
Software Reference Manual located in the installation path for this board.
unsigned long DIO_Configure(DeviceIndex, bTristate, pOutMask, pData)
unsigned long DIO_Configure(
unsigned long DeviceIndex - number from 0-31 of the device you want to configure
unsigned char bTristate - boolean value. TRUE causes all bits on the device to enter tristate
(high-impedance) mode. FALSE removes the tristate. The tristate is changed after the
remainder of the configuration has occurred. All devices with this feature power-on in the
"tristate" mode at this time.
void *pOutMask - a pointer to the first element of an array of bytes; one byte per 8 ports or
fraction. Each "1" bit in the array indicates that the corresponding byte of the device is
Output.
void *pData - a pointer to the first element of an array of bytes. Each byte is copied to the
digital output ports on the device before the ports are taken out of tristate. Any bytes in the
array associated with ports configured as input are ignored.
)
The size of the out mask and data is as follows:
Out Mask 2 bytes
Data 12 bytes
unsigned long DIO_WriteAll(DeviceIndex,pData)
unsigned long DeviceIndex - number from 0-31 of the device to which you wish to write all
output bits
void *pData - pointer to the first element of an array of bytes. Each byte is copied to the
corresponding output byte. Bytes written to ports configured as inputs are ignored
)
Note that the size of "all" is the same as the size of the data given under DIO_Configure.
unsigned long DIO_ReadAll(DeviceIndex,Buffer)
unsigned long DeviceIndex - number from 0-31 of the device from which you wish to read all
digital bits
void *Buffer - pointer to the first element of an array of bytes. Each port will be read, and the
reading stored in the corresponding byte in the array.
)
Note that the size of "all" is the same as the size of the data given under DIO_Configure.

Manual USB-DIO-4815
Chapter 6: Connector Pin Assignments
Two 50-pin male headers are provided for I/O connections designated as P2 and P3, which
are also referred to as Groups 0 and 1 respectively.
PIN P2 P3 PIN FUNCTION
1 I/O 23 I/O 47 2 GROUND
3 I/O 22 I/O 46 4 GROUND
5 I/O 21 I/O 45 6 GROUND
7 I/O 20 I/O 44 8 GROUND
9 I/O 19 I/O 43 10 GROUND
11 I/O 18 I/O 42 12 GROUND
13 I/O 17 I/O 41 14 GROUND
15 I/O 16 I/O 40 16 GROUND
17 I/O 15 I/O 39 18 GROUND
19 I/O 14 I/O 38 20 GROUND
21 I/O 13 I/O 37 22 GROUND
23 I/O 12 I/O 36 24 GROUND
25 I/O 11 I/O 35 26 GROUND
27 I/O 10 I/O 34 28 GROUND
29 I/O 09 I/O 33 30 GROUND
31 I/O 08 I/O 32 32 GROUND
33 I/O 07 I/O 31 34 GROUND
35 I/O 06 I/O 30 36 GROUND
37 I/O 05 I/O 29 38 GROUND
39 I/O 04 I/O 28 40 GROUND
41 I/O 03 I/O 27 42 GROUND
43 I/O 02 I/O 26 44 GROUND
45 I/O 01 I/O 25 46 GROUND
47 I/O 00 I/O 24 48 GROUND
49 +5VDC +5VDC 50 GROUND
Table 6-1: 50-Pin Connector Pin Assignments

Manual USB-DIO-4816
Chapter 7: Specifications
Digital Inputs (TTL Compatible)
• Logic High: 2.0 VDC min, 5.5 VDC max
• Logic Low: 0.8 VDC max, -0.5 VDC min
• Bias Resistors: 10K Ω
Digital Outputs
• Logic High: 2.0 VDC min., source 32 mA
• Logic Low: 0.55 VDC max., sink 64 mA
Bus Type
• USB2.0 high-speed (480 Mb/s)
Power
• Basic 48 bit unit: <300 mA typical (no load)
• +5 VDC from the USB bus or external power supply depending on user configuration.
The USB bus is specified to provide 500 mA to most desktop environments. This
gives you 182 mA available (500 mA - 300mA = 200 mA). If using more than a total
of 500mA, use optional Regulated 5 VDC external power supply and remove VUSB
jumper and place jumper on VEXT. Then plug in external power before plugging into
USB port.
• +5V with 0.5A resettable fuse for each connector
Environmental
• Operating Temperature: 0 °C. to 70 °C.
• Storage Temperature: -40 °C. to +85 °C.
• Humidity: 0 to 90% RH, non-condensing.
• Board Dimension: 3.550 x 3.775 inches.
• Box Dimension: 4.00 x 4.00" x 1.25 inches.

Manual USB-DIO-4817
Customer Comments
If you experience any problems with this manual or just want to give us some feedback, please email
us at: [email protected]. Please detail any errors you find, we will reply with manual updates
10623 Roselle Street, San Diego CA 92121
Tel. [phone] FAX [phone]
www.accesio.com