Allen-Bradley 80172-110-02-3 SMC Series Thyristor Unit

Allen-Bradley 80172-110-02-3 Thyristor Unit

The Allen-Bradley 80172-110-02-3, also cataloged as the 80172-110-02-3 Thyristor Unit, operates as a dedicated hardware component for power regulation and motor control switching within Allen-Bradley SMC-3 Soft Starter systems.

Suffix Breakdown & Model Matrix

• 80172: Designates the base series for power semiconductor interface units.
• 110: Specifies the operational voltage rating (110-120 VAC).
• 02: Denotes the current capacity and configuration variant within the product family.
• -3: Indicates the revision level, reflecting specific mechanical form factor updates and thermal dissipation improvements.

Hardware Specifications

Allen-Bradley Industrial Control Characteristics

The 80172-110-02-3 facilitates precise power conduction through backplane-integrated control logic. This unit maintains firmware flash compatibility, allowing for updates to switching timings and diagnostic thresholds when paired with compatible Allen-Bradley PLC communication modules. The internal architecture focuses on I/O density scaling, enabling the control system to manage multiple motor starter zones without increasing the physical cabinet footprint. Furthermore, the unit supports deterministic communication over the control network, ensuring that switching commands reach the thyristor gates with minimal jitter.

Frequently Asked Questions

Q: Does the 80172-110-02-3 support hot-swap operations in an energized panel?

A: No, this unit is not designed for hot-swapping. Operators must disconnect all power sources and verify zero energy before performing any maintenance or unit replacement to prevent damage to the backplane pins.

Q: How does the unit manage internal thermal loads during continuous operation?

A: The device utilizes high-conductivity materials and integrated heat sink dissipation profiles. Ensure that vertical clearance meets the minimum requirements stated in the SMC-3 manual to facilitate natural convection airflow.

Field Installation Guidelines

1. Mounting Stability: Secure the unit to the DIN-rail using the integrated clip mechanism. Ensure that the locking tab snaps into position to prevent vibration-induced dislodgement.
2. Electrical Connections: Use appropriately sized copper conductors for the load side. Tighten terminal screws to the recommended torque to maintain low-impedance connections and prevent thermal degradation of the terminal interface.
3. Shielding and Grounding: Route power-switching signals away from low-voltage analog cabling to eliminate induced noise. Connect the unit’s chassis ground to the main control panel earthing bus using a braided strap to minimize high-frequency impedance.
4. Diagnostic Verification: Upon energizing the system, observe the LED status indicators. A steady-state output confirms correct gate driver synchronization with the soft starter logic.