Honeywell 10302/2/1 Fail-Safe Watchdog Repeater 5V/24V DC

Product Overview

The Honeywell 10302/2/1 serves as a specialized Watchdog Repeater (WDR) module for the Honeywell Fail-Safe Control (FSC) platform. It provides high-integrity supervision of 5 VDC and 24 VDC power supply units within redundant or mixed I/O architectures. By generating continuous watchdog output signals, this module ensures that the safety system identifies power abnormalities or processor stalls instantly, triggering a fail-safe shutdown if parameters exceed safe limits. It acts as the "heartbeat" monitor for the chassis, maintaining system availability in critical oil, gas, and chemical processing environments.

Condition: 100% Brand New, Original Factory Sealed.

Technical Specifications

Engineering Advantages

• Fail-Safe Redundancy Supervision: The 10302/2/1 monitors multiple PSU configurations simultaneously. It prevents overvoltage faults from reaching sensitive I/O cards by ensuring the 24 VDC supply remains below 37 VDC even during simultaneous hardware failures.

• High-Current Watchdog Support: This module handles watchdog currents exceeding 900 mA. This capability allows engineers to deploy the unit in large-scale racks with high-density I/O modules that require significant signal strength to maintain the "ready" state.

• Physical Coding Security: The module utilizes specific rack coding (Holes A5, A9 and large pins A5, A9). This mechanical safety feature prevents operators from inserting the module into the wrong slot, eliminating the risk of electrical mismatch during field maintenance.

• Rapid Fault Detection: By repeating the watchdog signal across the backplane, the module ensures that every segment of the I/O section receives the safety pulse. Any interruption in this signal forces the I/O into a predefined safe state within milliseconds.

• Industrial Standard Eurocard Format: The standard 3U/4TE footprint allows for effortless integration into existing FSC chassis. The DIN 41612 Type F connector provides a vibration-resistant interface suitable for offshore platforms and high-vibration industrial sites.

FAQs

Where should I install the 10302/2/1 module within the rack?

You must install the watchdog repeater in the specific I/O section it monitors. Ensure you verify the mechanical coding pins (A5, A9) on your backplane to match the module's coding holes before insertion.

How does this module handle a "double fault" condition?

The 10302/2/1 features robust internal circuitry that limits the 24 VDC supply to under 37 VDC even when two concurrent faults occur. This protects the entire rack from catastrophic overvoltage damage and maintains the fail-safe integrity of the FSC system.

Is this module compatible with older FSC software?

Honeywell specifies compatibility with FSC software versions 3.00 and higher. If you are running an older legacy system, please consult your system integrator to confirm signal timing compatibility before replacing existing watchdog hardware.

Does the 10302/2/1 require external calibration?

No. This is a solid-state safety module factory-calibrated for life. Because it is a 100% brand new unit, it arrives ready for immediate deployment in safety-instrumented functions (SIF).