PCI-IIRO-8 Isolated Relay I/O Card
Features
- Universal PCI, PCI-X, 3.3V and 5V compatible (Call for PCI-Express availability)
- Eight optically isolated, non-polarized digital inputs
- Eight electro-mechanical relay outputs
- Opto-isolated channel to channel and channel to ground
- Can detect input state change and assert interrupt
- Automatically detected under Windows
- Operating temperature: 0 to +55°C
- Support for Wind River VxWorks (call for ordering information)
$658.00
In StockDescription
Isolated Digital Input/Output Cards
The PCI-IIRO-8 is a low-cost, half-size card that provides isolated input and output for PCI Bus computers. It has eight optically-isolated digital inputs for AC or DC control signals and eight electro-mechanical relay outputs. It occupies four consecutive eight-bit registers in I/O space.
Inputs
The isolated inputs can be driven by either AC or DC and are not polarity sensitive. Input signals are rectified by a diode bridge and applied to the inputs of opto-isolators. A 470 ohm resistor in series provides current limiting. Standard 12/24 AC control transmitter outputs can be accepted as well as DC voltages. The input voltage range is 5V to 24V (rms). To extend the input voltage range, you may connect external resistors in series.
Each input circuit contains a switchable slow/fast filter that has a 10 millisecond (PCI-IIRO-8) time constant. (Without filtering, the response is 20 microseconds.) The filter must be selected for AC inputs in order to eliminate response to zero crossings. The filter is also valuable for use with slow DC input signals in a noisy environment. The filter may be switched out for DC inputs in order to obtain faster response. The filters can also be individually selected by switches on the card.
Interrupts
Interrupts are enabled/disabled by software. When the change-of-state detection circuit is enabled, the card asserts an interrupt whenever one or more of the interrupts changes state. Once an interrupt has been generated and serviced, it must be cleared by system software. This feature greatly frees up system resources by eliminating the need for constant polling to see when an input has changed state.
Outputs
The electro-mechanical relay outputs of the PCI-IIRO-8 are comprised of five form C SPDT outputs and three Form A SPST (normally-open) type. The relays are all de-energized at power-on. Data to the relays is latched.
Connections
The PCI-IIRO-8, I/O is accessed via a male 37 pin DB connector on the mounting bracket of the card. See the ORDERING INFO tab for options and accessories.
Modified-COTS (MCOTS) Customization
ACCES can tailor any standard product to your precise requirements — electrical, mechanical, firmware, environmental, or connector-level. Common MCOTS options include alternate I/O ranges, isolation enhancements, firmware changes, private labeling, conformal coating, extended temperature operation, ruggedized enclosures, and military-grade components. If this product is close but not a perfect fit, our engineering team can deliver a rapid-turn MCOTS variant with minimal NRE and dependable, Made-in-USA quality.
Downloads
Manuals
Software
- PCI-IIRO-8 Software Package ( -- Last Uploaded 2025-05-07)
Drivers and Downloads
Full list of available Downloads: Software Packages, Drivers, Manuals, and other documents
Information about our Free Software packages:
ACCES is proud to provide a full suite of software support with every Data Acquisition product. We are committed to supporting the most popular operating systems and platforms for our customers. Currently we are actively supporting 7 -> 11, both 32 & 64 bit, including “Server 2008,” “Embedded,” and “Compact” flavors for all plug-and-play products including PCI, PCI Express, USB, and more. Many products continue to ship with support for additional operating systems such as DOS, Windows 95, 98, Me, NT4, 2000, and XP.
Samples
Among the software we deliver with our products are sample programs in a wide variety of programming languages. These samples are used to demonstrate the software interfaces to our products — and many can be used as-is in your production environments, or to test functionality of the devices out-of-the-box. We’re currently actively supporting sample programs in Microsoft Visual C#, and Delphi, with many devices including samples in Visual Basic (5 and .NET), Visual C/C++, and Borland C/C++ 3.1 for DOS. Additionally we provide National Instruments LabVIEW compatible DLLs and many demonstration VIs for our devices.
Drivers
Drivers for various operating systems are also provided, including active support for Windows 7 -> 11 — all in both 32-bit and 64-bit flavors, and including consumer, server, and embedded varieties — as well as the 2.6 and newer Linux kernels and recent OSX / macOS versions. Many products continue to ship with driver support for Windows 95, 98, Me, NT4, Windows 2000, XP, and more, but support for these operating systems is considered deprecated.
Setup Programs and Utilities
Our Data Acquisition devices also include a graphical setup utility that walks you through the process of configuring any option jumpers or switches on the device, as well as explaining a little about the various connectors present.
Many devices also include utility programs – little tools to make your use of the device easier, such as EWriter, a program that allows you to read and write data in the user-accessible EEPROM locations on all our USB data acquisition products; or WinRISC, a “Really Incredibly Simple Communications” terminal program that lets you get started instantly with serial devices.
“Register Level” Documentation
Besides all this software in all these languages and operating systems ACCES has a policy of open and transparent development: none of our lowest-level “register” interfaces are hidden from you — we document every register in every bus card, every command in every serial board, and every usb control transfer in every USB Data Acquisition board. These lowest-level interfaces allow you to develop for our products in ANY operating system or language, regardless of our actively supporting it or having a driver for it. We have customers actively developing in ADA, Android, Python, Java, MATLAB, Solaris, and more, just by referring to our complete low-level interface documentation! And we provide the full source code to all of our drivers, regardless of operating system, to give you an even bigger head start in your own development tasks.
No Fees or Royalties
All of this software is provided at no additional charge, and is licensed under any of a variety of flexible — and royalty free — options. Check out our software license explanation if you’d like more information.
Custom Software
ACCES also offers Custom Software Services for our products. Our prices are unbelievably low, often as inexpensive as free! If you need something tweaked to support your needs, or an entire enterprise application developed from scratch, it is definitely worth your time to inquire with us, first.
Further information about available ACCES Software:
Redistributing Windows Drivers
A list of ACCES drivers and the files that compose them under different versions of Windows, so you can easily redistribute ACCES cards and drivers.
aioWDM.VxWorks
ACCES has successfully partnered with Wind River to bring our entire line of PCI and PCI Express DAQ cards to VxWorks 7!
VxWorks 7 VxBus Gen 2 drivers, with easy-to-use API-libraries, are available for this product, including full source and sample code.
Designed to be compatible with our AIOWDM.dll Windows driver & API, this kernel module adds zero% CPU-cycle overhead to your VxWorks runtimes while allowing the lowest-latency hardware register access possible.
You can find more information about our VxWorks libraries and services on our Wind River Silver Partner page.
Digital Inputs
- Number of inputs: 8
- Type: Non-polarized, optically isolated from each other and from the computer. (not TTL/CMOS compatible)
- Voltage Range: 5 to 24V DC or AC (50 to 1000 Hz)
- Isolation: 500V*(see manual) channel to channel and channel to ground
- Input Resistance: 470 ohms in series with two diodes and an LED
- Response Time: 10 mSec w/filter, 20 uSec w/o filter
Relay Outputs
- Number of outputs: 8
- Contact Rating: 2A carry current, bifurcated, gold clad, silver palladium
- Contact Arrangement:
Channels 0-4 are SPDT Form C
Channels 5-7 are SPST Form A. - Contact Rating: Initial 100 milliohms maximum
- Contact Life: mech’l: 5 million operations minimum; elect’l: 5 million operations minimum at full load
- Operating Time: 2 milliseconds maximum
- Release Time: 1 milliseconds maximum
- Regulatory Approvals: UL and CSA
Interrupts
When enabled by software, interrupts are generated when digital inputs change state.
Power Required
+5VDC @ 0.675 A (all relays ON) for PCI-IIRO-8
Environmental
- Ambient Temperature:
Operating 0 to +55°C
Optional Industrial Version Operating: -25 to +55°C - Storage: -40 to +85°C
- Humidity: 0 to 90 percent (non-condensing)
- Weight: Approx. 8 oz. (227 grams)
- Size: 6.15″ (156 mm) long
Regulatory Compliance
This product is in full compliance with CE requirements.
| Model | Description | Price (USD) | |
|---|---|---|---|
| PCI-IIRO-8 | PCI-IIRO-8 | $658.00 |
| Accessories | ||
|---|---|---|
| Direct Connectivity | ||
| ADAP37F-MINI | $40 | Direct Plug Spring Cage Terminal Adapter with DB37 female, for analog outs |
| Cabled Connectivity |
||
| CAB37-18 | $25 | Ribbon cable, DB37 female to female connectors, 18″ |
| CAB37-36 | $29 | Ribbon cable, DB37 female to female connector, 36″ |
| STB-37 | $39 | DIN-rail mountable screw terminal board with DB37 male connector |
| STA-37 | $79 | Wireable screw terminal board with DB37 male and female connectors |
| Model Options (call for pricing) | ||
| -RoHS | Call | RoHS compliant version |
| -T | Call | Extended temperature operation (-40° to +85°C) |