The Allen Bradley PLC 5 1785 Series features high speed processors, which are single slot and used for both control and processing of information. They are made to allow for larger sequential and regulatory control applications. The PLC 5 Series allows for specialized I/O requirments and are able to work with other devices or even other processors. There is a wide range of Memory size, I/O module capacity, and they can be configured in a variety of communication networks for distributed I/O systems. The PLC 5 series has a wide variety of both analog and digital I/O cards and come in a industrial assembly. The Allen Bradley PLC-5 processors are exist in a range of different forcible I/O specifications that range from 512 maximum to 3072 maximum. There are two different types of power supply 1771 modules for the PLC 5 series. There are stand along power supplies that can be mounted seperately or directly next to the rack, and there are power supplies that are mounted directly into I/O module slots in the rack.