ROB-24: 24 SPDT (DPDT optional), Form C Relays Board
Features
- 24 SPDT, Form C Relays (DPDT optional)
- Fully compatible with any ACCES digital I/O card (except for IOD-64)
- 3A carry-current contact ratings on ROB-24
- Screw terminals for #14 through #22 AWG wire
- LED status indicators for each relay
- Removable Screw Terminal Option
- Designed, made, supported, and manufactured in the USA
Call Price range: Call through $249.00
In StockDescription
For remote (RS-485) control of relays, you can also connect a modified ROB-24 to our RDG-24.
Each relay provides normally-closed and normally-open contacts (SPDT). If you need dual Form C contacts (DPDT), you may specify ROB-24-2.
I/O connectors for 50-pin connections (from ACCES’ IOD-Series cards) and 37-pin connectors are provided. The latter provide means to use these relay cards with other manufacturer’s cards if they use 37-pin connections. Interconnection to the digital output card can be via ACCES’ model CAB50F-xx ribbon cable to ACCES’ I/O cards or via CAB37-xx ribbon cable to other I/O cards. The relays are actuated by a 5-volt logic signal applied to appropriate pins of either the 50-pin or the 37-pin connector. If the digital-output card to be used has an unbuffered output (e.g., direct output from a type 8255 Programmable Peripheral Interface chip), then specify ROB-24-3. (Note: When Option 3 is selected, the relays will be actuated when power is applied to the card.) Thus, by use of ROB-24, you can realize simple, inexpensive control of heaters, fans, lights, etc.
The ROB-24 may be interfaced to any port of any ACCES IOD- or DIO-Series card. Normally, digital inputs are pulled down to ground through 680 ohm resistors. However, if you prefer that they be pulled up to +5VDC, you can specify ROB-24-5. You can have multiple options in the card. For example, if you need AC-powered capability, DPDT relay output connections, and signals will come from an unbuffered digital output card, then the model number becomes: ROB-24-1-2-3
We’re sorry to report that due to the 4A relay no longer being available the ROB-24H “High Current” model is no longer available for sale.
PIN CONNECTIONS
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
- ROB-24H 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.
Relays
- Quantity and Type: 24 ea., SPDT, Form C. (DPDT optional.)
- Contact Material: Gold overlay silver.
- Max. Switched Current: 2A DC, 1.25A AC.
- Max. Carry Current: ROB-24: 2A AC or DC; [ROB-24H: 4A AC or DC]
- Max. Switched Voltage: 150 VDC or 220 VAC.
- Max. Switched Power: 30 W / 60 VA on ROB-24 [360 VA on ROB-24H]. (Note: Good safety practice should be followed if AC voltages are to be switched at the relays.)
- Actuate Time: ROB-24: 8 mSec; [ROB-24H: 20mSec] (including bounce).
- Release Time: ROB-24: 8 mSec (including bounce); [ROB-24H: 10 mSec] (including bounce).
- Mechanical Life Expectancy: 20 million operations minimum.
Environmental
- Operating temperature Range: 0o to 50oC.
- Storage Temperature Range: -30o to +105oC.
- Humidity: 45 to 85% RH, non-condensing.
Power Consumption (all relays ON)
- 5 VDCPower: ROB-24: 2A, [ROB-24H: 4A] max.
- 115 VACPower: ROB-24: 310mA, [ROB-24H: 390 mA] max.
Physical
- Card Dimensions: 16″ long x 4.75″ wide x 2″ high (407mm x 121mm x 51mm)
- Weight: 2.25 lbs.(1kg) max. (for Model ROB-24-1-2).
- Screw Terminal Wire Spacing: 0.200″ (5 mm).
- Screw Terminal Wire Sizes: 12 to 22 AWG.
We’re sorry to report that due to the 4A relay no longer being available the ROB-24H “High Current” model is no longer available for sale.
| Model | Description | Price (USD) | |
|---|---|---|---|
| ROB-24H - discontinued | High-Current 24 Form C Relay Output Board | Call | |
| ROB-24 | 24 Form C Relay Output Card | $249.00 |
| Model Options (call for pricing) | |
|---|---|
| -1 or -S01 | Powered by 125 VAC power |
| -2 or -S02 | Dual Form C contacts (DPDT |