PC/104 48 Channel TTL Digital Interface

Part: 3701   Model: DIO 48.PC104

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The 3701 PC/104 digital I/O interface module is designed around an ASIC emulating two 8255 chips, each providing 24 I/O lines. The board has a DIP switch for flexible I/O addressing, IRQ jumpers for interrupts and two sets of connectors for each port. Two standard solid-state 50-pin relay rack header connectors are provided.

Sealevel’s SeaIO Classic software drivers and utilities make installation and operation easy using Microsoft Windows operating systems.

Get a jump start on your digital I/O development with The Digital I/O Handbook that will provide helpful information that you will use again and again. Check out Chapter 1 for an overview of logic principles.

Note: This item has a minimum order quantity (MOQ) of 25 units. Please contact your sales representative with any questions.


Additional information

Board Connector

(2) 50-Pin Headers

Digital I/O


Extended Temperature

Call for Options

Humidity Range

10 – 90% Relative Humidity, Non-Condensing

Host Interface(s)


Number of Inputs/Outputs

48 (TTL)

Operating Temperature

0°C to 70°C (32°F to 158°F)

Output Specification

Sink up to 24mA, Source up to 15mA

# of Ports


Power Requirement

+5V @ 794mA

Storage Temperature

-50°C to 105°C (-58°F to 221°F)

  • 48 channels of buffered TTL I/O
  • Each 8-bit port individually configurable as input or output
  • 8255 mode 0 compatible
  • 10K pull up resistors on each bit
  • +5V power and ground provided on connector
  • Right-angle connectors available for OEM opportunities, two industry-standard 50-pin solid-state relay rack vertical header connectors standard
  • SeaI/O Classic software supports Windows 98, ME, NT, 2000, XP and Vista operating systems
  • Software support for DOS, Linux, Windows 3.1 and Windows 95 available


Manual: 3701


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