Profile: Sealevel Systems, Inc. supplies RS-422/485 communication adapters. We are an ISO 9001:2000 certified company. Our product line includes industrial computers, HMI computers, adapters, converters, relay racks, mounting hardware, terminal blocks and hubs & switches. Industrial computers are designed for I/O intensive applications. Relio R1000 systems provide all core processing functions inside a rugged metal enclosure small enough to mount in any application. TB34 terminal block adapter offers a simple solution for connecting RS-422 and RS-485 field wiring to a serial port. Single point discrete 24V DC input module provides a discrete input, 24VDC, 5V logic, with LED and high speed switching, and is used for laboratory applications.