Allen-Bradley makes programmable controllers such as PLCs, for I/O control, report generation, arithmetic, communication, and more; automation controllers which merge PC-based and PLC architecture as well as offering scalability and application portability in an open modular architecture; and safety controllers for the safety parts of your machine control system.

GE Intelligent Platforms programmable logic controllers including their Durus line, available in AC and DC models, with 8 amp relay outputs (isolated), support for Profibus Slave, Modbus Slave, and DeviceNet Slave, and an LCD backlit display.

Omron's programmable controllers include those that are for small-scale equipment up to handing entire production lines. Their units feature analog I/O, temperature sensor inputs, motion control capabilities, high performance, and high speed.

Schneider Electric makes several models of PLCs that can use ModBus Plus, ProfiBus, have variable numbers of inputs and outputs, a PC card that can turn a PC into a PLC, and much more.

Mitsubishi makes programmable logic controllers including safety PLCs and modular PLCs. Their safety controllers are scalable for any need from a single machine to an entire production line and requires no special programming techniques.

Advantech makes programmable automation controllers that support 5 standard IEC 61131-3 programming languages in WinCE5.0 as well as optional HMI software.

Control Technology Group offers PLCs including small self-contained systems to large networked systems that utilize thousands of I/Os, and can be used for integrating I/O, user interfaces, and servo/stepper motors.

National Instruments makes programmable automation controllers for use in communication, data logging, advanced control, and signal processing with motion, rugged hardware performing motion, process control, vision, and logic functions.

Opto 22 makes PAC project programmable automation controllers, including standalone controllers for large projects using multiple network, protocol, or legacy support as well as on-the-rack models for localized control, automation, and data acquisition needs.

Proces-Data makes distributed process intelligence programmable automation controllers that feature up to 480KB RAM with battery backup, LED state indicators, low power usage, process-pascal programmable, real time clock, and is EMC approved.

SEL makes PLCs for SCADA, station integration, monitoring, and control in extreme physical and electrical environments.

Artilla Electronics manufactures versatile PLCs including Linux box computers, single board PCs and Linux programmable automation controllers as well as custom designed hardware and software.