TRS Fieldbus Systems, Inc - Rochester Hills, MI
Manufacturer, Service Company
Manufacturer of modules & controllers.

Diamond Systems Corp. - Mountain View, CA
Distributor
Distributor of embedded systems & related products. Some products include I/O boards & modules, PC-104 analog I/O boards, & single board computers.

Tek Microsystems, Inc. - Chelmsford, MA
Manufacturer
Serial I/O, Digital I/O

PCC Professional Controls Corp. - Germantown, WI
Distributor
Distributor of controllers including optocoupler I/O modules with switching sequences up to 500 Hz. Modules are designed for supporting loads up to 4 A current at 24 voltage. Programmable relays, PLCs, PC based controls, HMI systems & software & fail-safe, high density modular, slice, IP65/67 block/modular & intrinsically safe I/O are also available.
Brand Names: Burkert

Power Components, Inc. - Fort Lauderdale, FL
Distributor, Custom Manufacturer
Distributor of industrial automation products including I/O modules. I/O modules are flexible & types include PM bus modules, AS interface modules & remote I/O modules.

Comark Corporation - Medfield, MA
Manufacturer
Packaging, Processing & Distribution Of I/O & Software Applications

Lexi Computer Systems Corp. - Ward Hill, MA
Distributor, Manufacturer
I/O Devices, Printer Connectivity To IBM Main Frame

Pepperl + Fuchs, Inc. - Twinsburg, OH
Manufacturer
Sensors, Industrial Networking Products, Identification Systems, Automation Products

Vista Controls - Valencia, CA
Manufacturer
Manufacturer Of Computer Software, Military Control Systems

Statesville Process Instruments - Statesville, NC
Distributor
Distributor of temperature & control process devices.

Voltec, Inc. - Pittsburgh, PA
Manufacturer
Manufacturer Of Control Systems

Interface Technology - Walnut, CA
Manufacturer
VXI

MicroDimensions, Inc. - Mentor, OH
Manufacturer, Custom Manufacturer
P.C. Board Design & Assembly

Texonics, Inc. - Denton, TX
Distributor, Custom Manufacturer, Manufacturers' Rep, Service Company
Distributor of modules including I/O modules & control & switching modules. I/O modules feature analog & digital input & output & counter modules. Control modules feature Ethernet data gateway, fiber optic converter, Modbus to BACnet & serial converter.