WWP-IIRO-8 DISCONTINUED Wireless Isolated Input, Form C Output Module Pair

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  • Wireless digital input / relay output module pair
  • No software or PC connection is required
  • 8 optically-isolated, non-polarized digital inputs
  • 8 Form C SPDT electromechanical relays can switch up to 1 Amp each
  • Each input on one unit is mapped to automatically control the corresponding relay in the other
  • NEMA4 enclosure for harsh atmospheric, industrial, or marine environments
  • 900MHz wireless connection
  • 4 mile line-of-sight communication
  • Internal removable screw terminals for simplified wiring
  • Designed, made, supported, and manufactured in the USA


  • OEM versions available with custom firmware or without NEMA4 enclosure
  • 2.4GHz wireless connection
  • Optional input only and relay only versions
  • High-gain antenna
  • 1000mW output radio for up to 20 miles line-of-site range
Last updated on November 2, 2023, 6:30 pm


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Model WWP-IIRO-8 features a pair of intelligent 16-channel digital I/O units that communicate directly with each other. Each unit contains 8 Form C (SPDT) electromechanical relays and 8 optically isolated digital inputs. When an isolated input is toggled on one of the units it will cause the corresponding relay to switch on the other unit. No software or PC connection is required as this solution is completely self-contained and operates autonomously.

The units are packaged in small, rugged, NEMA4 enclosures; perfect for remote installations in harsh atmospheric, industrial, or marine applications. This product offers a low-cost alternative to costly signal wire installations in applications such as agricultural and irrigation systems, building management and control, security, and factory automation.

The units can operate at distances up to 4 miles line-of-sight via a 900MHz wireless connection (up to 20 miles with optional 1000mW output radio). The 8 isolated inputs can be driven by either DC sources of 3-31V (or higher by special order) or AC sources at frequencies of 40Hz to 10kHz and are not polarity sensitive. The WWP-IIRO-8 is useful for monitoring controllers and equipment status, then transparently repeating these key functions wirelessly via relay contact for visual indicators, decision making, and emergency response deployment. Just connect the contactor coil, or other monitoring point, across the input and that’s it. Whenever the coil is energized the input is on. For dry-contact monitoring applications, simply wire the power supply voltage into the switch circuit.

No software is required. The WWP-IIRO-8 was designed to work without the need of any additional software. No PC connection is required! Simply connect the supplied power supply, wire via the removable screw terminal board provided, and operate.


  • Factory Automation
  • Energy Management and Conservation
  • Agricultural and Irrigation Systems
  • Security
  • Refinery
  • Marinas and Ports
  • Lighting
  • Traffic and Mobile


The WWP-IIRO-8 is a standalone module that needs no operating system, no software, not even a computer! The provided Software Master CD contains the manual and a visual guide to configuring the onboard filter jumpers, but is completely optional. Simply connect power and your signals via the provided screw terminal accessory, and it will immediately begin its operation, continuing until power is removed.

For OEM or other embedded applications the advanced design includes an onboard microcontroller which provides inherent flexibility for customization — if the default behavior of the pair does not quite meet your needs, the onboard firmware can be customized to make it a perfect fit. Just contact the factory for a customization quotation — Like all of ACCES’ custom software development, the minimum cost is Free!


Data Sheets



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 XP -> 10, 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, and 2000.


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#, Visual Basic, Delphi, and Visual C/C++, with many devices including samples in Borland C/C++ 3.1 for DOS. Additionally we provide National Instruments LabVIEW compatible DLLs and many demonstration VIs for our devices.


Drivers for various operating systems are also provided, including active support for Windows XP -> 10 — 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, and Windows 2000, but support for these operating systems is considered deprecated.

Setup Programs and Utilites

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 acquisitition 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.

Isolated Inputs

  • Number / Type: Eight / Non-polarized, optically isolated from each other and from the computer
  • Logic Low: -0.5 V to 0.8 V (CMOS compatible)
  • Logic High: +3.0 V to +33.0 V
  • Isolation: 60V channel-to-ground or channel-to-channel
  • Resistance: 1.8kO in series with two diodes and an LED

Relay Outputs

  • Number / Type: Eight / SPDT (Form C)
  • Contact Type: Single Crossbar
  • Contact Material: Silver + Gold-clad
  • Rated Load: 0.5 A at 125 VAC; 1 A at 24 VDC
  • Switching Current: 1 A (max)
  • Switching Voltage: 125 VAC; 60 VDC (max)
  • Switching Capacity: 62.5 VA; 30 W (max)
  • Contact Resistance: 100 mO (max)
  • Operate / Release Time: 5 ms
  • Contact Life (mechanical): 5 million operations

900 MHz Radio

  • Frequency Range: 902 to 928 MHz, Unlicensed ISM Band
  • Type: Frequency Hopping Spread Spectrum
  • Communication rate: 9600 baud
  • Transmit Power: 100mW without antenna, 200mW with antenna
  • Receiver Sensitivity: -110dBm
  • Outdoor Range: Up to 4 miles (line of sight), 20 miles with 1000mW output radio option
  • Interference Rejection: 70dB at pager and cellular phone frequencies
  • RF Data Rate 76.8 kbps
  • Interface Buffer Size: 256 bytes each

900MHz Antenna

  • Frequency Range: 902 to 928 MHz
  • Impedance: 50 O nominal
  • Gain: 2.1 dBi
  • Length: 7”
  • Polarization: Vertical
  • Wave: Half Wave
  • Connector: SMA reverse polarity plug (RPSMA)


  • Operating Temperature: 0°C to 65°C
  • Temperature De-rating: Based on the power applied, maximum operating temperature may have to be de-rated because internal power regulators dissipate some heat
  • Storage Temperature: -20°C to +70°C
  • Humidity: 5% to 95% RH non-condensing

Regulatory Compliance

  • This product is designed to be in full compliance with CE requirements.
ModelDescriptionPrice (USD)

DISCONTINUED Wireless pair of 8 ISO IN / Form C Out Module Pair