H.M. STEIN SOHN CAMOS 6809 B A105.3 Industrial Control Module

3. Key Technical Specifications

4. Product Introduction & Supply Chain Strategy

The H.M. STEIN SOHN CAMOS 6809 B A105.3 is a processor board used as the central control unit within CAMOS 6809 automation systems, executing logic and coordinating communication across connected I/O modules.

This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. CPU modules are single points of failure with no redundancy in many legacy systems. Securing buffer stock is essential to mitigate lead time variability and avoid full system outages. From a Total Cost of Ownership (TCO) perspective, New Surplus ensures long service life and eliminates the reliability risks associated with refurbished boards.

5. Installation & Configuration Guide

Stage 1: Pre-Installation (Prep & Safety)

• Execute lock-out/tag-out (LOTO) procedures.
• Use an ESD wrist strap and grounded workbench.
• Back up system logic/program if possible.
• Photograph DIP switch settings and note firmware/ROM version.

Stage 2: Removal

• Release retaining clips or fasteners.
• Carefully extract the CPU board straight out.
• Inspect backplane connectors for bent pins or wear.

Stage 3: Installation (Clone & Seat)

• Match DIP switches, jumpers, and configuration exactly.
• Align board with guide rails and insert evenly.
• Ensure full seating to guarantee stable bus communication.

Stage 4: Power-On & Testing

• Restore power and verify stable 24 V DC supply.
• Observe status LEDs (CPU RUN, FAULT indicators).
• Confirm system boot and communication with I/O modules.
• Validate control logic execution before returning to service.

6. Firmware/Software Versions & Upgrade Notes

• Recommended Firmware: Match ROM/firmware version exactly with the existing CPU board.
• Compatibility Warning:
  • Different ROM revisions may affect instruction handling or system timing.
  • Incompatible firmware can prevent system boot.
• Upgrade Risk:
  • Upgrading firmware without full validation may disrupt control logic execution.
  • Downgrading may remove required features or bug fixes.
• Best Practice: Always document firmware/ROM version before replacement and maintain exact version parity.

CAMOS 6809 B A105.3

CAMOS 6809 B A105.3

CAMOS 6809 B A105.3

7. Frequently Asked Questions (FAQ)

Q1: Is this CPU board truly new?
Yes. This is a New Surplus unit with no prior use, no repairs, and no component wear. It undergoes full QC verification before shipment.

Q2: Why is this module considered high criticality?
As the central processor, failure results in complete system shutdown. There is typically no redundancy in CAMOS 6809 systems.

Q3: Is this part still available from the manufacturer?
No. This module is discontinued (EOL). A last-time-buy strategy is strongly recommended.

Q4: What stocking strategy should we follow?
Maintain at least 1–2 CPU units as buffer stock per system. For multi-plant operations, consider centralized inventory with rapid deployment to balance carrying cost and availability.

Q5: Can I swap this CPU board while the system is powered?
No. Always power down the system. Hot-swapping can damage the board and corrupt system memory.

Q6: Will replacing the CPU affect the program or logic?
Programs are typically stored in onboard memory. Ensure backup is available and firmware/ROM version matches to avoid compatibility issues.

Q7: What warranty and testing are included?
Each unit includes a 12month warranty, full functional testing (boot verification, communication checks), electrical validation, and traceable serial documentation to ensure OEM-level reliability.