PC/104 16 Optically Isolated Input Digital Interface

Part: 3720   Model: DIO-104.OPTO

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The 3720 PC/104 digital I/O interface provides 16 optically isolated inputs for connection to devices including sensors, switches, push buttons, and other user inputs. The inputs can sense both AC and DC voltage while providing optical isolation, which eliminates spikes and surges present in industrial environments.

The inputs on the 3720 are rated for 3-13V. For 10-30V inputs, order the 3720H.

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

Get a jumpstart 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

40-Pin Header

Digital I/O

Isolated Inputs

Extended Temperature

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Humidity Range

10 – 90% Relative Humidity, Non-Condensing

Input Range

3-13 VDC

Host Interface(s)


Number of Inputs/Outputs

16 Inputs

Operating Temperature

0°C to 70°C (32°F to 158°F)

# of Ports


Power Requirement

+5V @ 125mA

Storage Temperature

-50 – +105C

16 optically isolated AC or DC inputs
Socketed dip resistor allows user configurable input range up to +24V
Power (+5V and +12V) and ground provided on connector
Right-angle connector available for OEM opportunities, 40-pin vertical header 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: 3720


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