ControlLogix series: This is AB's most powerful large-scale PLC system, modular structure, support hot swap, redundancy, unlimited I/O, support EtherNet/IP, ControlNet, DeviceNet and other network communications, support sequence control, motion control, Transmission control, and process control are very powerful and have a wide range of applications. If it is a large-scale project, this series is recommended.

CompactLogix series: This is AB's medium-sized PLC system, modular without rack structure, does not support hot-swap, supports EtherNet/IP, ControlNet, DeviceNet, and other network communications, supports sequence control, motion control, transmission control, and process control, It is rumored that AB replaces the SLC500 series with this series, but customer acceptance is not high. On the one hand, there is ControlLogix for large-scale systems, while small and medium-sized systems have SLC500 with long-term application practices and a slightly lower price, so its promotion is difficult.

FlexLogix series: Distributed system, supports hot-swap, used for distributed applications on the equipment site. The processor can be used as an independently distributed controller, or the communication adapter with I/O can be used as a distributed I/O station. Using Flex I/O distributed stations can reduce project costs.

SLC500: Small control system, modular rack structure, does not support hot-swapping, and is widely used.

MicroLogix: Micro-control system, which is divided into four series: MicroLogix1000, 1100, 1200, 1500, of which 1100 is just launched and integrates an Ethernet communication port.

Siemens	Triconex	Schneider
146659-069	Triconex 9563	140DAO84000
15377-4FM	Triconex 7400028-100	140CPU65150
15738-119	Triconex 4000093-310	TSXP4720
16135-21-2	Triconex 2652-5 7400166-390	140AMM0900
16147-51-2	Triconex 2652-310	140CPS11420
16168-1-1	Triconex 3502E	140CRA21110
16180-500 PSMBXNAN	Triconex 9000011-000	140NOE77101
16182-1-3	Triconex 7400169-310	490NRP25400
16187-1-1	Triconex 9760-210	140XBP01600
16249-51-4	Triconex 2352	140NOC78100
16267-1/4	Triconex 4000042-120	UST21
16267-1-2	Triconex 4000029-025	140DDO84300