Acces I/O products PCIe-DIO-24HS User manual

10623 Roselle Street, San Diego, CA 92121 [phone] Fax [phone]
[email protected] www.accesio.com
MODELS
PCIe-DIO-24HS
PCIe-DIO-24H
PCI Express 24 Channel Digital I/OCard
with Change of State Detection
USER MANUAL
File: MPCIe-DIO-24HS.A1c

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
2
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 2015 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 BOARD. CONNECTING AND DISCONNECTING
CABLES, OR INSTALLING BOARDS INTO A SYSTEM WITH THE
COMPUTER OR FIELD POWER ON MAY CAUSE DAMAGE TO THE I/O
BOARD AND WILL VOID ALL WARRANTIES, IMPLIED OR EXPRESSED.

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
3
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 PCIe-DIO-24HS PCI Express Digital I/O Card
4
TABLE OF CONTENTS
Chapter 1: Introduction........................................................................................................................................ 5
Features ............................................................................................................................................................. 5
Applications.......................................................................................................................................................5
Functional Description..................................................................................................................................... 5
Ordering Guide.................................................................................................................................................. 7
Factory Options................................................................................................................................................. 7
Optional Accessories .......................................................................................................................................7
Chapter 2: Installation.......................................................................................................................................... 8
Software CD Installation................................................................................................................................... 8
Hardware Installation........................................................................................................................................8
Chapter 3: Hardware Details................................................................................................................................ 9
Option Selection................................................................................................................................................ 9
VCC Select......................................................................................................................................................... 9
Bias Select.........................................................................................................................................................9
50 Pin Header .................................................................................................................................................... 9
Quick-Disconnect Grounding Tab.................................................................................................................10
Chapter 4: Address Selection ........................................................................................................................... 11
Chapter 5: Programming ...................................................................................................................................12
Chapter 6: Connector Pin Assignments........................................................................................................... 15
Chapter 7: Specifications ..................................................................................................................................17
Customer Comments ......................................................................................................................................... 18
LIST OF FIGURES
Figure 1-1: Block Diagram................................................................................................................................... 6
Figure 3-1: Option Selection Map ....................................................................................................................... 9
Figure 6-1: 50-Pin Male Header ......................................................................................................................... 15
LIST OF TABLES
Table 1-1: Accessories......................................................................................................................................... 7
Table 5-1: Register Address Map......................................................................................................................12
Table 5-2: Base +0 Port A DIO........................................................................................................................... 12
Table 5-3: Base +1 Port B DIO........................................................................................................................... 12
Table 5-4: Base +2 Port C DIO........................................................................................................................... 13
Table 5-5: Base +3, DIO Port Direction Control Register ............................................................................... 13
Table 5-6: Base +A, DIO Buffer Enable.............................................................................................................13
Table 5-7: Base +B, IRQ Enable COS and C3 ..................................................................................................14
Table 5-8: Base +E, Port C3 IRQ Enable...........................................................................................................14
Table 6-1: Connector Pin Assignments............................................................................................................15
Table 6-2: I/O Header Connector Signal Names, Directions and Descriptions............................................ 16
Table 7-1: VCCIO Logic Levels.......................................................................................................................... 17

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
5
Chapter 1: Introduction
The PCIe-DIO-24HS is a x1 lane PCI Express (PCIe) board designed for use in a variety of
Digital I/O (DIO) applications. It uses the high speed PCIe bus to transfer digital data to and
from the board. The DIO emulates 8255 compatible chips making it easy to program. This
also allows for simple migration from older ACCES’ PCI-based DIO boards. Change of State
(COS) and interrupt capabilities relieve software from polling routines that consume valuable
processing time. Lastly, the x1 lane PCIe connector is very flexible and can be inserted into
any x1, x4, x8, x16, or x32 PCIe slots.
Features
•24 high-current DIO lines
•50-pin male header with ground lines on all even pins to suppress crosstalk
•COS interrupt (“S” models only)
•User interrupt on Port C bit 3
•DIO lines buffered
•Four and eight bit Ports independently selectable for inputs or outputs
•Pull-up resistors on DIO lines (user configurable pull-down)
•5V VCCIO (3.3V user configurable)
•Fused VCCIO voltage available to the user on I/O header
•Compatible with industry standard I/O racks like Gordos, Opto-22, Potter & Brumfield,
Western Reserve Controls, 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
Functional Description
This product is a x1 lane PCIe DIO board. It occupies sixteen bytes of I/O address space and
the base address is selected by the system. The card emulates an 8255 compatible chip,
providing 24 DIO lines in three 8-bit Ports: A, B, and C. Each 8-bit Port can be software
configured to function as either inputs or outputs. Port C can be further broken into two 4-bit
nybbles. Also, these nybbles can be software configured to function as either inputs or
outputs.

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
6
This board has two methods for generating an interrupt. The first is using bit 3 of Port C (C3
IRQ). When this method is enabled, a rising signal edge detected on bit 3 of Port C will
generate an interrupt. The second method uses COS detection hardware to produce an
interrupt ('S' model only). When a Port has COS enabled, any changes of the Port's bits (low-
to-high or high-to-low) will cause an interrupt. Refer to Chapter 5: Programming for enabling,
disabling, and clearing the interrupts.
Each DIO line is buffered and capable of sourcing 32mA or sinking 64mA. The VCCIO level is
5V or can be configured as 3.3V.
By default, the DIO lines are pulled up with 10kΩ resistor networks to VCCIO. DIO lines can
also be configured as pulled down by moving a jumper.
DIO wiring connections are via the 50-pin header on the mounting bracket of the board. This
provides compatibility with OPTO-22, Gordos, Potter & Brumfield, and other module mounting
racks. Every second conductor of the ribbon cable is grounded to minimize crosstalk between
signals in the cables. VCCIO is available on each I/O connector (pin 49) for external use, see
page 10.
Figure 1-1: Block Diagram

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
7
Ordering Guide
•PCIe-DIO-24HS 24-bit Digital I/O card with change of state detection, with a latching 50
pin header on the card mounting bracket
•PCIe-DIO-24H 24-bit Digital I/O card with a latching 50 pin header
•PCIe-DIO-24HS-S01 24-bit Digital I/O card with change of state detection, non-latching 50 pin
connector, & quick disconnect grounding tab on the mounting bracket
Factory Options
•Extended temperature operation (-40° to +85°C)
•RoHS compliant version
Optional Accessories
•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, ships with standoffs but can also
mount on SNAP-TRACK or DIN-SNAP
•DIN-SNAP-6
Six inch length of SNAP-TRACK with two clips for
mounting an STB-50 screw terminal board on a DIN rail
Table 1-1: Accessories

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
8
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
operating system. Substitute the appropriate drive letter for your drive where you see D: in the
examples below.
Windows
a. Place the CD into your CD-ROM drive.
b. The install program automatically run. If the install program does not run, click
START | RUN and type , click OK or press .
c. Follow the on-screen prompts to install the software for this board.
Linux
a. Please refer to linux.htm on the CD for information on installing under Linux.
Hardware Installation
Please install the software package before plugging the hardware into the system.
Refer to the printed I/O Quick Start Guide included with your board which can also be found
on the CD, for specific, quick steps, to complete the hardware and software installation.
Caution! ESD
A single static discharge can damage your card and cause premature
failure! Please follow all reasonable precautions to prevent a static
discharge such as grounding yourself by touching any grounded
surface prior to touching the card.

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
9
Chapter 3: Hardware Details
Option Selection
Refer to the setup program 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.
VCC Select
Position the jumper to select either 5VTTL logic, or 3.3VDC logic.
Figure 3-1: Option Selection Map
Bias Select
Select 10k ohm pull up or pull down resistors per port using the provided jumpers on the card.
50 Pin Header
The latching 50 pin header has standard 0.100" spacing between pins and is keyed to prevent
improper connections. It can be used with standard IDC type ribbon cables. A non-latching
header is used for the –S01 card version.

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
10
Quick-Disconnect Grounding Tab
A quick disconnect grounding tab exists on the mounting bracket for the –S01 card version. It
is connected to the board ground plane, which connects to the PC power supply return /
chassis ground.
VCCIO Resettable Fused Output
There is a 0.5A resettable fuse. It connects to pin 49 of the I/O connector and is used to
protect the card and PC power supply when used to power external module racks, relay
boards, or for general purposes. If an over-current persists on a circuit protected by the
resettable fuse, it will open interrupting power to the circuit. The amount of time it takes the
fuse to act depends on the amount of over-current and other conditions such as ambient
temperature, humidity, etc. The fuse will remain open until the bi-metal elements cool
sufficiently, at which time the circuit will be restored.

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
11
Chapter 4: Address Selection
The Vendor ID for this card is 0x494F. (ASCII for "IO")
The Device ID for the PCIe-DIO-24HS is 0x0E54.
The Device ID for the PCIe-DIO-24H is 0x0C53.
This card uses I/O addresses offset from the base address assigned by the PCIe bus. The
address spaces are defined in the programming section of this manual.
PCIe architecture is Plug-and-Play. This means that the BIOS or Operating System
determines the resources assigned to PCIe cards rather than the user selecting those
resources with switches or jumpers. As a result, you cannot set or change the card's base
address or IRQ level. You can only determine what the system has assigned.
The following information is for advanced users only:
The PCIe bus supPorts 64K of I/O address space, so your card's addresses
may be located anywhere in the 0000h to FFFFh range.
To determine the base address that has been assigned, run the PCIFind
utility program. This utility will display a list of all the cards
detected on the PCI/PCIe bus, the addresses assigned to each function on
each of the cards, and the respective IRQs.
Alternatively, Windows systems can be queried to determine which
resources were assigned. In these operating systems, you can use either
PCIFind, or the Device Manager utility from the System Properties Applet
of the control panel. The card is installed in the Data Acquisition
class of the Device Manager list. Selecting the card, clicking
Properties, and then selecting the Resources Tab will display a list of
the resources allocated to the card.
In Linux you can use the LSPCI command to determine this information. A
PCIFind.pl script is also provided which may simplify this task.
An example of how to locate PCIe card resources in DOS is provided with
in the PCI\SOURCE directory, under your installation directory. This
code runs in DOS, and uses the PCI defined interrupt BIOS calls to query
the PCI bus for card specific information. You will need the Device ID
and Vendor ID listed above to use this code.
The card uses more resources than you usually need be concerned with.
PCIFind will show only the most commonly required information to reduce
confusion.
For those who require it, be aware of the following:
BAR[0]: memory mapped PEX8311
BAR[1]: I/O mapped PEX8311
BAR[2]: I/O mapped card registers (←all most software needs)

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
12
Chapter 5: Programming
This card is an I/O-mapped device that is easily configured from any language. The base
address is assigned by the computer system during installation. The card's read/write
functions are as follows.
Address
Function
Operation
Base Address +0
Port A
Read/Write
Base Address +1
Port B
Read/Write
Base Address +2
Port C
Read Write
Base Address +3
Control Register
Read/Write
Base Address +4
through +9
Not used
N/A
Base Address +A
DIO Buffer Enable
Read/Write
Base Address +B
DIO COS IRQ Enable
(S Models Only)
Read/Write
Base Address +C
Not used
N/A
Base Address +D
Global IRQ Disable
Write
Base Address +E
Port C bit-3 IRQ Enable
Read/Write
Base Address +F
IRQ Clear
Write
Table 5-1: Register Address Map
Base Address +0 (read/write) Port A DIO
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
Table 5-2: Base +0 Port A DIO
Reading from this address will return the digital data on Port A. Writing to this address will
output the digital data on Port A. Readback is supported while in output mode. Base Address
+3 controls Port A’s input/output direction.
Base Address +1 (read/write) Port B DIO
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
Table 5-3: Base +1 Port B DIO
Reading from this address will return the digital data on Port B. Writing to this address will
output the digital data on Port B. Readback is supported while in output mode. Base Address
+3 controls Port B's input/output direction.

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
13
Base Address +2 (read/write) Port C DIO
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
Table 5-4: Base +2 Port C DIO
Reading from this address will return the digital data on Port C. Writing to this address will
output the digital data on Port C. Readback is supported while in output mode. Port C can
also be broken into two nybbles, Port C Low (bits 0-3), and Port C High (bits 4-7). Each nybble
can be independently set as input or output. Base Address +3 controls Port C's I/O direction.
Base Address +3 (read/write) Control Register
The DIO function contains a control register. This 8-bit register is used to set the direction of
the Ports. At power-up or reset, all DIO lines are automatically set as inputs and should be
configured during initialization by writing to the control register even if the Ports are going to
be used as inputs. Bit 7 must be set to ‘1’ when configuring the direction of the Ports. This
register can be readback with bits 2, 5, 6, and 7 always reading zero.
Ports can be written to while configured as inputs. When a Port is changed from input
to output, the last written value will be applied. If a Port has never been written to, the
value on the Port's pins while in input mode will be applied to the Port when configured
as an output. This prevents the Ports pins from glitching when set as outputs.
Bit
Assignment
Code
D0
Port C Lo (C0-C3)
1=Input, 0=Output
D1
Port B
1=Input, 0=Output
D2
Reserved
Set to ‘0’
D3
Port C Hi (C4-C7)
1=Input, 0=Output
D4
Port A
1=Input, 0=Output
D5,D6
Reserved
Set to “00”
D7
Direction Set Flag
1=Active
Table 5-5: Base +3, DIO Port Direction Control Register
Base Address +4 through +9 Not Used
Base Address +A (read/write) DIO Buffer Enable / Disable (tri-state)
At power-up or reset, all DIO buffers on the card are enabled. To globally disable the DIO
buffers write a one to bit 0. To globally re-enable the DIO buffers, write a zero to bit 1. When
the buffers are disabled the connector pins are tri-stated and biased by the state of the pull up
or down configuration jumper. A read returns the buffer status; 0=enabled, 1=disabled.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
‘0’
‘0’
‘0’
Port A
Port C Hi
‘0’
Port B
Port C Lo
Table 5-6: Base +A, DIO Buffer Enable

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
14
Base Address +B (read/write) IRQ Enable DIO COS (S models) and C3
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
‘0’
‘0’
‘0’
‘0’
‘0’
Port C
Port B
Port A
Table 5-7: Base +B, IRQ Enable COS and C3
At power-up or reset, all IRQ sources on the card are disabled. To enable the COS IRQ, write
a zero to the bits that correspond to the port(s) desired. Any changes detected on the bits
within the enabled port(s) will generate an IRQ. To disable COS IRQ, write a one to bits that
correspond to the port(s) desired.
Base Address +C Not Used
Base Address +D (write) IRQ Disable Global
Write any value to this address to disable all IRQ sources on the card.
Base Address +E (read/write) IRQ Enable Port C bit-3
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
‘0’
‘0’
‘IRQ Output’
‘1’
‘0’
‘0’
‘0’
C3
Table 5-8: Base +E, Port C3 IRQ Enable
At power-up or reset, all IRQ sources on the card are disabled.
To enable the C3 IRQ, write a one to bit 0. A rising edge detected on bit 3 of Port C will
generate an IRQ. To disable the C3 IRQ, write a zero to bit 0.
Bit 4 is a read-only, and is always a ‘1’ to maintain backwards compatibility with the PCIe-DIO-
24DS.
Bit 5 is a read-only, which is the status of the board IRQ output pin. A “1” indicates the IRQ is
active (latched). A “0” indicates no IRQ is pending.
Base Address +F (write) IRQ Clear
Any value written to this address will clear the status bit and pending IRQ.

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
15
Chapter 6: Connector Pin Assignments
A 50-pin male header is provided for I/O connection. The mating connector is an AMP type
1-746285-0 or equivalent
Figure 6-1: 50-Pin Male Header
Pin
Signal Name
Pin
Signal Name
1
PC7
2
GND
3
PC6
4
GND
5
PC5
6
GND
7
PC4
8
GND
9
PC3*
10
GND
11
PC2
12
GND
13
PC1
14
GND
15
PC0
16
GND
17
PB7
18
GND
19
PB6
20
GND
21
PB5
22
GND
23
PB4
24
GND
25
PB3
26
GND
27
PB2
28
GND
29
PB1
30
GND
31
PB0
32
GND
33
PA7
34
GND
35
PA6
36
GND
37
PA5
38
GND
39
PA4
40
GND
41
PA3
42
GND
43
PA2
44
GND
45
PA1
46
GND
47
PA0
48
GND
49
VCCIO
50
GND
Table 6-1: Connector Pin Assignments
* This line is an I/O Port and also used for C3 IRQ.

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
16
Signal Name
I/O
Signal Description Name
PC7
I/O
Port C bit 7
PC6
I/O
Port C bit 6
PC5
I/O
Port C bit 5
PC4
I/O
Port C bit 4
PC3
I/O
Port C bit 3 / when C3 IRQ is enabled will generate an IRQ on a rising edge
PC2
I/O
Port C bit 2
PC1
I/O
Port C bit 1
PC0
I/O
Port C bit 0
PB7
I/O
Port B bit 7
PB6
I/O
Port B bit 6
PB5
I/O
Port B bit 5
PB4
I/O
Port B bit 4
PB3
I/O
Port B bit 3
PB2
I/O
Port B bit 2
PB1
I/O
Port B bit 1
PB0
I/O
Port B bit 0
PA7
I/O
Port A bit 7
PA6
I/O
Port A bit 6
PA5
I/O
Port A bit 5
PA4
I/O
Port A bit 4
PA3
I/O
Port A bit 3
PA2
I/O
Port A bit 2
PA1
I/O
Port A bit 1
PA0
I/O
Port A bit 0
VCCIO
O
5V or optionally 3.3V via 0.5A resettable fuse for external module racks etc.
GND
X
Ground
Table 6-2: I/O Header Connector Signal Names, Directions and Descriptions

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
17
Chapter 7: Specifications
VCCIO 5V or 3.3V (jumper configurable)
Logic Levels
5V
3.3V
Low Inputs
≤ 1.5V
≤ 2uA
≤ 0.8V
≤ 2uA
High Inputs
≥ 3.5V
≤ 2uA
≥ 2.0V
≤ 2uA
Low Outputs
≤ 0.55V
32mA
≤ 0.55V
24mA
High Outputs
≥ 3.8V
32mA
≥ 2.4V
24mA
Table 7-1: VCCIO Logic Levels
Power Output VCCIO (P3 pin 49)
Environmental
Operating Temperature 0° to 70°C, optional -40° to +85°C
Storage Temperature -55° to +150°C
Humidity 5% to 95% RH, without condensation
Board Dimensions Length - 6.6"; Height - 4.2" (seated)

Manual PCIe-DIO-24HS PCI Express Digital I/O Card
18
Customer Comments
If you experience any problems with this manual or just want to give us some feedback,
please email us at: [email protected]m. Please detail any errors you find and include
your mailing address so that we can send you any manual updates.
10623 Roselle Street, San Diego CA 92121
Tel. [phone] FAX [phone]
www.accesio.com