The Allen-Bradley 1747OC-EBCBA, also cataloged as the 1747OCEBCBA Open Controller CPU, operates as a dedicated hardware component for central processing and system control execution within SLC 500 architecture networks.

Model Suffix Nomenclature Analysis

• 1747OC-EBCBA: Standard catalog designation referencing an open controller central processing unit equipped with onboard volatile memory allocation and backplane power regulation.
• 1747OCEBCBA: Alternative spare inventory part code representing the identical physical processing hardware configuration.
• Open Controller CPU: Specifies the modular processing engine architecture optimized for chassis slot insertion and multi-tasking industrial logic operations.

Hardware Specifications

Backplane Bus and Network Communication Parameters

The processor regulates backplane bus communication velocity and firmware flash compatibility across connected rack assemblies. I/O density scaling relies on precise slot addressing while maintaining deterministic network synchronization with distributed input and output modules. Backplane current loading demands strict adherence to system power budgets, requiring 2.25 Amps at 5 Volts DC directly from the chassis bus interface to preserve operational signal integrity.

Package Ordering Information

• 1 x Allen-Bradley 1747OC-EBCBA Open Controller CPU hardware unit
• 1 x Onboard RAM module configuration slot assembly
• 1 x Terminal protection housing and diagnostic cover

Physical Installation and Mounting Guidelines

• Chassis Slot Placement: Insert the CPU module exclusively into the far-left slot of the designated chassis to align properly with system backplane bus connectors.
• Environmental Protection: Maintain ambient operating temperatures between 0 deg C and 60 deg C while keeping relative humidity levels within 5% to 95% non-condensing limits.
• Power Supply Connections: Terminate the external 24 VDC power supply source to the designated processor terminals using copper conductors sized to minimize voltage drop.
• Grounding Protocols: Secure the chassis mounting hardware directly to a low-impedance structural earth ground point to suppress electromagnetic interference.

Frequently Asked Questions

• Does this central processing unit support hot-insertion and removal under power?
  • No, inserting or removing the 1747OC-EBCBA while the chassis backplane power is active can cause electrical faults and damage internal circuitry.
• Which specific chassis slot is required for mounting this CPU?
  • The unit must be installed strictly in the left slot of the compatible SLC 500 rack assembly.
• What is the exact power requirement drawn from the backplane bus?
  • The module draws a continuous current load of 2.25 Amps at 5 Volts DC from the chassis backplane.
• What voltage level is required for the external controller power input?
  • The hardware operates using a dedicated 24 VDC external power supply input connected directly to the unit terminals.
• How is user program memory scaled on this specific hardware model?
  • System memory supports configurable RAM capacity ranging from 64 MB up to 256 MB depending on application demands.
• Are firmware updates supported through network communication interfaces?
  • Yes, firmware flash compatibility allows system updates via connected programming terminals without replacing physical hardware components.
• What environmental humidity range is permissible during operation?
  • The unit functions reliably within relative humidity levels spanning from 5% to 95% under non-condensing conditions.
• How should the unit be protected against extreme operating temperatures?
  • Ensure adequate vertical clearance inside the electrical enclosure to permit continuous natural convection cooling across the module housing.