The Omron CS1W-BC103, also cataloged as the CS1W-BC103 CPU Backplane Unit, operates as a dedicated hardware component for central rack power distribution and internal bus communication within SYSMAC CS1 controller assemblies.

Functional Class Breakdown

• CS1W System Identifier: Designates structural mounting rack hardware compatible with CS1 system power supply units, CPUs, and I/O modules.
• BC Backplane Code: Indicates a CPU backplane rack fitted with dedicated power supply, CPU, and expansion bus cable connectors.
• 103 Slot Allocation Index: Specifies 10 available I/O expansion slots alongside the dedicated CPU and power supply unit positions.

Physical Parameters

Backplane Integration and Scalability

The backplane maintains backplane bus communication velocity across all 10 local module slots. Onboard copper tracks facilitate uniform power distribution from the power supply unit to all connected modules, supporting high I/O density scaling while maintaining firmware flash compatibility across installed intelligent I/O units.

Package Order Content

• 1 x Omron CS1W-BC103 10-Slot CPU Backplane Unit
• 1 x Expansion Bus Connector Cover Cap
• 2 x Panel Mounting Brackets

Physical Mounting and Wiring Standards

• De-energize Control Cabinet: Always disconnect primary AC/DC power sources before mounting the backplane or plugging in CPU and I/O modules.
• Ground Lug Termination: Connect a dedicated protective earth ground conductor (10 AWG minimum) directly to the functional earth terminal on the backplane frame.
• Convective Clearance Rules: Maintain a minimum vertical distance of 50 mm above and below the backplane unit for unrestricted thermal dissipation.
• Connector Shielding Cap: Keep the protective cover cap installed on the expansion bus connector if no expansion cable is attached.

Frequently Asked Questions

• Can CPU or I/O modules be hot-swapped directly from the CS1W-BC103 backplane?

  No, removing or inserting modules while the backplane power supply is active can damage internal bus driver circuits and halt the system.

• How many total expansion slots are available for functional I/O cards?

  The chassis features 10 general-purpose slots in addition to the dedicated slots reserved for the power supply unit and CPU processor.

• Does the CS1W-BC103 backplane require an external DC power connection?

  No, the backplane is a passive structural unit that routes 5 VDC and 24 VDC power directly from the installed power supply module.

• How is an expansion rack linked to the CS1W-BC103 CPU backplane?

  A dedicated CS1 expansion bus cable connects from the right-hand expansion port of the CS1W-BC103 to the expansion backplane unit.

• What panel mounting hardware is required to secure the backplane frame?

  Use four M4 pan-head steel screws tightened into threaded enclosure mounting plate holes to achieve a solid mechanical ground bond.

• What limits the maximum number of I/O modules installed on the backplane?

  The total 5 VDC power consumption of all 10 installed modules must not exceed the current output rating of the power supply unit.

• Does the backplane require individual slot addressing via DIP switches?

  No, slot addresses are fixed geographically by the backplane printed circuit board trace layout from left to right starting at slot 00.

• How does ground noise suppression function across the backplane chassis?

  The backplane incorporates an internal ground plane bonded to the metallic mounting frame and functional earth terminal pin.