Compact USB Digital I/O Solutions


CSealevel Systems, Inc. announces the SeaDAC Lite family of USB digital I/O solutions offering system designers a compact, low-cost alternative for interfacing any USB equipped computer with real world signals. The first two SeaDAC Lite products feature four optically isolated inputs and four Reed relays outputs (Item# 8111) or Form C relay outputs (Item# 8112). For maximum reliability, all SeaDAC Lite products include Sealevel’s patent-pending SeaLATCHTM locking USB connector design to prevent accidental cable disconnection. SeaDAC Lite modules are perfect for a wide variety of applications including process control, facility management, security, and broadcast automation. The optically isolated inputs protect the host computer from damaging voltage transients and ground loops commonly found in industrial and OEM applications. The 8111’s SPST Reed relays are rated to 500mA, and the 8112 uses high-current SPDT Form C relays to switch up to 6A loads. To simplify installation and troubleshooting, status LEDs display I/O activity and USB connection information. All SeaDAC Lite modules are powered by the USB connection to the host computer. SeaDAC Lite modules are housed in rugged plastic enclosures ideal for mounting on walls, under counters, or inside equipment panels. 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. Standard SeaDAC Lite modules operate between 0°C to +70°C and designers can special-order extended temperature range (-40°C to +85°C) modules. SeaDAC Lite modules are available now and prices start at $159. Sealevel Systems, founded in 1986, provides industrial computing solutions in addition to a variety of communications and I/O products including PCI Bus cards, Ethernet serial servers, USB serial adapters, PCMCIA cards, and PC/104 modules. Sealevel’s 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.


• Host Interface USB • # of Ports 4 • Brand/Family SeaDAC Lite • Digital I/O Form C Relay Output • Integration No • Number of Inputs/Outputs 4 outputs • USB Specification 1.1 Compliant • 2.0 Compatible • Power Requirement +5V @ 500mA • Contact Voltage 60VDC Max. • 250VAC Max. • (5VDC Min.) • Contact Current AC 6A max. • Contact Current DC <30 VDC @ 5A max. • >30 VDC @ 700mA max. • (100mA min.) • Contact Operate Time 10ms max. • Contact Release Time 5ms max. • Operating Temperature 0 - +70C • Extended Temperature Call for Options • Storage Temperature -50 - +105C • Humidity Range 10 - 90% R.H. • Dimensions 4.3 (L) x 3.4 (W) x 1.3 (H)
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