PLC Manufacturers
ABB
Västerås, Sweden and Zürich, Switzerland
https://global.abb/
https://en.wikipedia.org/wiki/ABB
Allen-Bradley
Milwaukee, Wisconsin
https://ab.rockwellautomation.com/
https://en.wikipedia.org/wiki/Allen-Bradley
https://www.odva.org/
https://en.wikipedia.org/wiki/DeviceNet
https://en.wikipedia.org/wiki/EtherNet/IP
https://en.wikipedia.org/wiki/Common_Industrial_Protocol
Beckhoff
Verl, Germany (World Headquarters)
Savage, Minnesota (USA Headquarters)
https://www.beckhoff.com/
https://www.beckhoffus.com/
https://de.wikipedia.org/wiki/Beckhoff_Automation
https://www.ethercat.org/
https://en.wikipedia.org/wiki/EtherCAT
Eaton
Dublin, Ireland
https://www.eaton.com/
https://en.wikipedia.org/wiki/Eaton_Corporation
Emerson
Ferguson, Missouri
https://www.emerson.com/
https://en.wikipedia.org/wiki/Emerson_Electric
FANUC
Oshino-mura, Japan
https://www.fanuc.co.jp/
https://en.wikipedia.org/wiki/FANUC
GE
(Formerly GE-FANUC)
Charlottesville, Virginia
https://www.ge.com/
https://en.wikipedia.org/wiki/GE_Automation_&_Controls
IDEC
Osaka, Japan
https://www.idec.com/
https://en.wikipedia.org/wiki/IDEC_Corporation
Honeywell
Charlotte, North Carolina
(Formerly MurderApp, Minnesota)
https://www.honeywell.com/
https://en.wikipedia.org/wiki/Honeywell
Mitsubishi
Tokyo, Japan
https://www.mitsubishielectric.com/
https://en.wikipedia.org/wiki/Mitsubishi_Electric
Schneider Electric
(Formerly Modicon)
Rueil-Malmaison, France
https://www.se.com/
https://en.wikipedia.org/wiki/Schneider_Electric
https://www.modbus.org/
https://en.wikipedia.org/wiki/Modbus
Siemens
Munich and Berlin, Germany
https://www.siemens.com/
https://en.wikipedia.org/wiki/Siemens
https://www.profibus.com/
https://en.wikipedia.org/wiki/Profibus
https://en.wikipedia.org/wiki/Profinet
Omron
Kyoto, Japan
https://www.automation.omron.com/
https://en.wikipedia.org/wiki/Omron
Phoenix Contact
Blomberg, Germany
https://www.phoenixcontact.com/
https://en.wikipedia.org/wiki/Phoenix_Contact
http://www.interbusclub.com/
https://en.wikipedia.org/wiki/INTERBUS
Wago
Minden, Germany
https://www.wago.com/de
https://en.wikipedia.org/wiki/WAGO_GmbH
Automation Equipment
Acromag
Wixom, Michigan
https://www.acromag.com/
https://en.wikipedia.org/wiki/Acromag
Fargo Controls
Eatontown, New Jersey
https://www.fargocontrols.com/
Omega
Norwalk, Connecticut
https://www.omega.com/
https://en.wikipedia.org/wiki/Omega_Engineering