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Part# 3720H


PC/104 16 Optically Isolated Input Digital Interface (10-30V)

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Optimized for 24V, the 3720H 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 3720H are rated for 10-30V. For 3-13V inputs, order the 3720.

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.
Host Interface(s) PC/104
# of Ports 16
Digital I/O Isolated Inputs
Number of Inputs/Outputs 16 Inputs
Power Requirement +5V @ 125mA
Input Range 10-30 VDC
Board Connector 40-Pin Header
Operating Temperature 0 - +70C
Extended Temperature Call for Options
Storage Temperature -50 - +105C
Humidity Range 10 - 90% Relative Humidity, Non-Condensing
• 16 optically isolated AC or DC inputs optimized for +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

Terminal Block Kit
Terminal Block Kit


40-Pin IDC to DB37 Cable
40-Pin IDC to DB37 Cable


The Digital I/O Handbook
The Digital I/O Handbook


Terminal Block
Terminal Block


The Digital I/O Handbook (*Free)
The Digital I/O Handbook (*Free)


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