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.

ABB provides programmable logic controllers including scalable models, and uses protocols including devicenet, can open, Profibus, Modbus RTU, and more.

B&B Electronics sells programmable logic controllers designed for speed, while paying mind to your space concerns, featuring 32-bit data processing, use with up to 512 inputs and outputs, and embedded 100kHz HSC & Pulse outputs as well as a maximum of seven communication ports.

Divelbiss offers several programmable logic controllers including a harsh environment controller, universal control panels with HMI, plug-in PLCs, and PCS controllers (din-rail mountable with analog inputs and outputs).

Eaton makes PLCs in four styles, 10 I/O, 12 I/O, 14 I/O, and 12 I/O with high speed relays, and come in different combinations of interrupts, a large selection of analog in/out, combined, thermocouple RTD, and platinum, and over 240 instructions such as floating point math, hex, communications, octal, and more.

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.

IDEC makes nano PLCs and Micro PLCs, such as the MicroSmart Pentra, which offers fast processing speed, 16 bit analog resolution, supports up to 512 I/Os, up to seven communication ports, and supports 32-bit data and floating point match.

Keyence offers programmable logic controllers such as their Visual KV model series which feature many expansion options, easy to use access Window, 10-µs interrupt and 30-kHz high-speed counters, and a built in AC power supply.

Ringdale makes a network and web-managed PLC, with 16 inputs and eight outputs, flash programmable, and a power supply and battery charger that can keep the controller running fully for up to eight days.

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.

Toshiba makes small PLCs and Micro PLCs, which are expandable and feature pulse/PWM output for 4k data registers, large memory, 8k program, stepper motor control, and 256 timers & counters, ASCII message storage, and uses a stored program cyclic scan system.

Flexicon makes digital programmable controls including relays and controllers, with easy to operate interfaces such as HMI and push buttons, touch screens, and more as well as NEMA 4 and 7/9 control panels.

Panasonic makes many programmable logic controllers including compact impulse controllers, ultra-slim models, nano rack models, and panel mount models.

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.

IMO offers PLCs in various models, including compact modular PLCs with high speed scan time and up to 80 direct I/O as well as compact rack PLCs with up to 384 direct I/Os, capable of being expanded for analog inputs and outputs, comms, and Fieldbus.

Rexroth Bosch Group manufactures a variety of PLCs including the IndraLogic PLC system which features a high performance innovative control platform, scalable PLC functionality, comprehensive software modules for motion-control, quick expansion and easy connection for I/O and function modules and easy integration for HMI solutions.

Fuji ELectric's line of PLCs includes the Micrex-SX SPH featuring an I/O control with a program capacity of up to 256K steps and up to 8192 points enables suitable system configuration ranging from small through to large scale. 1ms program scan and I/O refresh are possible. Function and performance distribution are possible in multi CPU system configuration with up to 8 CPUs.

Hitachi manufactures a variety of compact programmable logic controllers developed to provide network abilities that exceed international standards and reduce EMC noise by integrating innovative PLC components. Models include the maximum power MICO-EH, a miniature webcontroller and a variety of modular mini PLCs.

Koyo Electronics Industries manufactures a variety of PLCs including the KOSTAC PLC, a workplace-oriented stage-type programmable controller. Other products include the DirectLOGIC 05 series PLC which features 8 inputs and 6 outputs, 2k program memory, 4k data memory, 2 communications ports and 129-instructions, including 4 PID loops.