IC693CHS397 5-Slot Modular CPU Baseplate (CPU Baseplates)

In PLC systems, the CPU baseplate serves as the central unit that houses the CPU and provides connections for other modules. There are two primary types of CPU baseplates: embedded and modular. These two types differ in terms of flexibility, expandability, and cost-effectiveness.
Differences Between Embedded and Modular CPU Baseplates:

    Embedded CPU Baseplate:
    In this type, the CPU and memory chips are soldered directly onto the backplane circuit board. While this offers a more cost-effective solution, it limits the expandability and power compared to modular systems.

    Modular CPU Baseplate:
    Unlike embedded systems, modular baseplates do not have CPU and memory chips on the backplane. Instead, they feature a connector in Slot 1 for a plug-in CPU module. This CPU module contains the CPU and memory chips on its internal circuit board, providing greater flexibility and expandability.

Embedded CPU Baseplates (Models 311, 313, 323)

Embedded baseplates are simpler and more cost-effective but come with certain limitations:

    Fixed CPU Type:
    The CPU type cannot be changed, as the CPU and memory chips are integrated into the backplane. This limits the ability to upgrade or replace the CPU.

    No Support for Expansion or Remote Racks:
    Embedded baseplates lack expansion connectors, meaning they do not support additional or remote racks. This contrasts with modular baseplates, which allow for system expansion.

    Model Types and Slot Configurations:
        Model 311 and 313: Both models are 5-slot baseplates.
        Model 323: This model features a 10-slot baseplate.
        Since embedded CPU baseplates do not require a plug-in CPU module, all slots, including Slot 1, can be used for I/O or optional modules.

    Memory Backup Battery:
    The memory backup battery is located within the power supply module. If the power supply is removed from the baseplate, the battery will be disconnected from the memory circuits on the backplane. However, the backplane contains a supercapacitor that can store enough charge to maintain memory circuits for about 1 hour in case the power supply or battery is removed. For further details, refer to Chapter 6 of the Series 90-30 PLC Installation and Hardware Manual, GFK-0356P (or a later version).

    No Configuration Switches or Jumpers:
    Models 311, 313, and 323 do not have any configuration switches or jumpers, making them more straightforward to set up and operate.

    Rack Numbering:
    An embedded CPU baseplate is always assigned Rack Number Zero (0) by default, which simplifies system configuration.

Advantages of Modular CPU Baseplates:

Modular CPU baseplates offer greater flexibility and expandability since the CPU and memory chips are housed on a separate module that plugs into the baseplate. This allows users to swap out or upgrade the CPU module easily. Additionally, modular systems support the use of expansion racks and remote I/O modules, enabling more complex and scalable system configurations.

>>IC693CHS397 User manual (pdf)

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