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Press Releases

New SeaDAC Optically Isolated Input & High-Current Relay USB Module

Date: 12/20/2006

Sealevel Systems, Inc. announces the expansion of the SeaDAC family of USB data acquisition devices with the introduction of the SeaDAC PLC-16H digital I/O module. Offering a powerful combination of high-current Form C outputs and optically isolated inputs, SeaDAC PLC-16H modules are perfect for a wide variety of applications including process control, facility management, security, and broadcast automation.

The SeaDAC PLC-16H provides eight SPDT high-current Form C relays that can directly switch up to 6A loads at 250VAC and 100VDC. Additionally, eight non-polarized inputs can monitor 5-30VDC and provide optical isolation to protect the host computer and other sensitive equipment from voltage transients and ground loops that are common in industrial environments. For connecting I/O, removable terminal blocks are standard, enabling fast, versatile field wiring.

For easy software integration, application programs or 3rd party software can use Sealevel?s SeaMAX library or industry standard Modbus protocol. A variety of helpful diagnostic utilities and sample programs are included.

SeaDAC modules are housed in rugged, attractive plastic enclosures and include a highly-retentive USB type B connector to prevent accidental disconnection. Standard operating temperature range is 0?C to 70?C and extended temperature range (-40?C to +85?C) is optional. The SeaDAC PLC-16H, part number 8232, is priced from $299 in small volume quantities and product is available immediately from stock. Like all Sealevel I/O products, SeaDAC modules are backed by a lifetime warranty.

For more information on Sealevel Systems, please contact Earle Foster at Sealevel, by phone at (864) 843-4343, or by email at

Download this media release along with high-resolution graphic at your convenience from the Sealevel ftp site at


Sealevel Systems, founded in 1986, provides industrial computing solutions in addition to a variety of communications and I/O products including PCI Express and PCI Bus cards, Ethernet serial servers, and USB serial adapters. The product line includes multi-port RS-232, RS-422/485, RS-232/422/485 multi-interface high-speed sync/async, and digital/relay I/O. For more information visit or call 864-843-4343.


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