Product Overview

The Honeywell 10302/2/1 Watchdog Repeater (WDR) is an essential safety component in the Fail-Safe Controller (FSC) system. This module ensures the continuous monitoring of the safety processor's "heartbeat" across multiple power supply domains. It repeats the watchdog signal across 24 VDC to 5 VDC power supply units, guaranteeing that all power segments in complex rack configurations are simultaneously monitored. This prevents any power domain from operating in an unmonitored state, ensuring the safety and integrity of your redundant power architecture. We supply this unit as 100% brand new, original factory stock to ensure uninterrupted safety for your system.

Technical Specifications

Engineering Advantages

• Redundant PSU Synchronization:
  In systems with multiple power supply units (PSU 2, 3, 4, etc.), the 10302/2/1 repeats the watchdog signal to ensure that every 5 VDC bus is synchronized with the central processor’s safety state.

• Over-Voltage Protection Logic:
  The module protects against over-voltage conditions, ensuring that power supplies exceeding 31.0 Vdc do not damage sensitive backplane electronics by providing a critical safety interlock.

• Fault-Tolerant Monitoring:
  The 10302/2/1 ensures fault tolerance even in cases of single or double fault conditions in the 24 VDC power supply, maintaining the maximum output voltage below 37 Vdc for safety.

• Critical Component for HE Power Supplies:
  Required for integration with high-efficiency M24-20 HE or M24-12 HE units, ensuring that these high-output power sources are properly integrated into the safety watchdog loop.

FAQs

• When exactly is the Watchdog Repeater required?
  It is needed for every additional power supply unit (PSU 2, 3, etc.) and whenever using power supplies that might exceed 31.0 Vdc output to ensure the system can maintain a fail-safe state.

• What happens if the 10302/2/1 fails?
  The module is designed to be fail-safe. If it fails, it will break the watchdog loop, causing the associated power domain to transition into a safe shutdown mode to prevent unmonitored operation.

• Is there a software configuration for the Watchdog Repeater?
  The watchdog repeater operates at the hardware level, with the function reflected in the Honeywell Safety Builder software's hardware tree. Its operation is managed by physical backplane wiring and internal timing logic.

• Can this module be hot-swapped?
  No, removing this module during operation will trigger a safety trip for all modules powered by the associated PSU. Replacement should only occur during a maintenance window to avoid disruption