IOB-96 and IOB-48 Isolated FET Output Accessories

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  • 96 or 48 High-Side Power MOSFET outputs
  • Tru-Iso™ I/O-to-PC 3.75kVrms opto-isolated
  • 5.5” × 5.75”,
  • IOB-96 mates directly to USB-DIO-96-OEM
  • IOB-48 mates directly to USB-DIO-48-OEM and ETH-DIO-48-OEM
  • Industrial Operating Temperature (-25°C to +85°C)
Last updated on March 4, 2024, 10:43 am


In Stock


The IOB-96 and IOB-48 optically isolated FET output accessory board is designed to add wide voltage and flexible current output signaling to existing TTL/CMOS DIO signals in a compact high-density accessory.

Each 24-bit group has its own FET supply voltage (Vbb) and return (OUT-) terminal for flexible isolation and signal voltages.

These cards are well suited to complex environments, mitigating otherwise challenging ground-loops, common in electrically-noisy industrial or factory locations. The broad voltage compatibility allows use in a wide range of applications.

These handy accessories plug into our USB products as follows:
The IOB-96 plugs directly onto the top of the USB-DIO-96-OEM
The IOB-48 plugs directly onto the top of the USB-DIO-48-OEM and ETH-DIO-48-OEM.

Special Order

Please contact ACCES with your precise requirement. Examples of special orders would be conformal coating, custom product labeling, and more. We will work with you to provide exactly what is required.


No software is needed for this isolated FET accessory board.


Data Sheets

No software is needed for this isolated FET accessory board


  • Channels: 96 (or 48)
  • Type: High Side Power MOSFET Switch.
  • Protected against short-circuit, over-temp, overvoltage, overload, reverse battery, & ESD.
  • Drives resistive, inductive, and capacitive loads.
  • Voltage Range: 11-45VDC (customer supplied).
  • One FET supply voltage (Vbb) and return (OUT-) per 24 FETs
  • Current Rating: 0.2A maximum, each FET
  • Turn On time: 50μsec (typical)
  • Turn Off time: 75μsec (typical)
  • Tru-Iso™ I/O-to-PC: Isolation: 3.75kVrms
  • Opto-isolator Per IPC-22B: 700V isolation I/O-to-Computer on all signals


  • FET Outputs: Terminal Block. Phoenix Contact 1989845; 20-24AWG
  • Vbb and return: Terminal Block. Phoenix Contact 1985027; 16-24AWG
  • Inputs: 50-pin Female IDC headers (×4) with OPTO/GORDOS pinout


  • Length: 139.7mm (5.5“)
  • Width: 146.05mm (5.75“)


  • Operating Temp: -25° to +85°C
  • Storage Temp: -55 to +85 C
  • Humidity: Maximum 90% RH, without condensation
  • Power: 5V@ 450mA, typical with all FETs ON


ModelDescriptionPrice (USD)

48 High-Side Power MOSFET outputs


96 High-Side Power MOSFET outputs