Part#: 8224


USB to 32 Reed Relay Outputs Digital Interface Adapter



The 8224 provides 32 SPST Form A dry contact Reed relays for PC-based control and automation of equipment via an available USB port. Reed relays provide long-life switch closures well suited to low current devices. Outputs are grouped into four-bit segments that each share a common for easy wiring via removable 3.5mm terminal blocks.

SeaDAC modules are housed in a rugged, attractive plastic enclosure and include a highly-retentive USB Type B connector to prevent accidental disconnection. Standard operating temperature range of SeaDAC modules is 0C to +70C and extended temperature range (-40C to +85C) is optional.

The SeaMAX software suite supports the SeaDAC family and is designed to work with third party applications via the SeaMAX API software libraries, or use any Modbus RTU compliant device. Sealevel’s SeaMAX software drivers and utilities make installation and operation easy using Microsoft Windows and Linux 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.

Additional information

Weight 2.0000 lbs
Dimensions 9.2 x 5.3 x 1.7 in

Contact Bounce Time

Contact Current

Contact Operate Time

Contact Release Time

Contact Voltage

Digital I/O


Extended Temperature

Humidity Range

Host Interface(s)


Number of Inputs/Outputs

Operating Temperature

# of Ports

Power Requirement

Storage Temperature

USB Specification

  • • 32 SPST Form A Reed relays
  • • Removable screw terminals simplify field wiring
  • • High-retention USB Type B connector prevents accidental disconnection of USB cable
  • • Powered by USB connection
  • • Sealevel SeaMAX software supports Microsoft Windows and Linux operating systems
  • • Housed in rugged, attractive plastic enclosure
  • • 72 inch USB A to B cable included

Windows Software

Software: SeaMAX - Windows

Linux Software

Software: SeaMAX - Linux


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