©Sealevel Systems, Inc.
270U Manual
9
SL9179 05/2012
The SeaI/O-270U is an optically isolated USB hub that connects up to seven USB peripherals
while protecting the host computer from voltages up to 1500 VAC. This protects the host
computer from potentially damaging voltage spikes, power surges, and ground loops
commonly found in industrial and OEM applications.
The SeaI/O-270U integrates SeaLATCH USB ports, which are fully compatible with standard USB
cables. When used with the included USB cable with a SeaLATCH type B USB connector, the
metal thumbscrew provides a secure metal-to-metal connection to the hub and prevents
accidental cable disconnection.
Additionally, a highly-retentive type B USB connector helps prevent unintentional separation
from a standard USB cable. The SeaLATCH type B locking connector and high retention type B
port are shown below.
The hub’s seven SeaLATCH type A locking USB connectors can secure USB peripherals to the
hub in the same way. Two of the SeaLATCH type A USB ports are shown below. Each of the
seven downstream type A USB ports provides a full 500mA to USB peripherals.
