Introduction
Is your redundant power architecture truly protected against silent watchdog failures? In multiple-PSU configurations, the Honeywell 10302/2/1 Watchdog Repeater (WDR) provides the critical link that ensures every 24 Vdc to 5 Vdc power supply unit is properly monitored. This compact module is essential for system integrity when using PSU 2, 3, or 4, or when your 24 Vdc source is an M24-20 HE or M24-12 HE unit.
Why the 10302/2/1 Is Essential for Redundant Systems
The 10302/2/1 is not a generic component; it is a targeted solution for specific high-risk configurations. You need this watchdog repeater if your 24 Vdc supply can exceed 31.0 Vdc, or if the required watchdog current surpasses 900 mA. It is also mandatory when combining redundant and non-redundant I/O to create a watchdog output for the non-redundant output modules. In systems with redundant Central Parts and non-redundant I/O, it monitors the 5 Vdc supply when no other monitoring exists. Without it, your system may operate blind to power faults.
Technical Specifications
The 10302/2/1 operates on 5 Vdc at 35 mA (excluding WDROUT output current) and 24 Vdc at 25 mA. The WDG1 and WDG2 inputs draw only 0.1 mA. It carries CE, TÜV, and UL approvals and requires software version 3.00 or higher. The module occupies 4 TE, 3 HE (4 HP, 3U) and weighs just 0.12 Kg. Module code holes A5 and A9, along with rack code large pins A5 and A9, ensure proper physical alignment.
Applications and Integration
In oil and gas automation, the 10302/2/1 is vital for redundant control systems where power supply monitoring cannot be compromised. It integrates seamlessly into racks using the specified A5 and A9 pin configuration. When combining redundant and non-redundant I/O, this repeater creates the necessary watchdog output for non-redundant modules, ensuring consistent fault detection across your architecture. For systems using M24-20 HE or M24-12 HE power supplies, it provides the required monitoring layer.
Selection and Maintenance
Before ordering, verify your configuration requires a watchdog repeater: multiple PSUs, high watchdog current, or specific power supply models. The 10302/2/1 is ready-to-ship from Oil AutoTech, with fast dispatch worldwide. For maintenance, inspect connections periodically and ensure the module is seated correctly in its rack. Always follow manufacturer guidelines for safety and operation.
Frequently Asked Questions
What is the primary function of the Honeywell 10302/2/1?
It acts as a watchdog repeater, monitoring 5 Vdc power in multiple-PSU configurations and providing a watchdog output for non-redundant I/O modules.
When is the 10302/2/1 required?
It is required for each subsequent 24 Vdc to 5 Vdc PSU (e.g., PSU 2, 3, 4), when using M24-20 HE or M24-12 HE supplies, when 24 Vdc can exceed 31.0 Vdc, when watchdog current exceeds 900 mA, or when combining redundant and non-redundant I/O.
What are the power requirements for this module?
It requires 5 Vdc at 35 mA (without WDROUT output current) and 24 Vdc at 25 mA. The WDG1 and WDG2 inputs draw 0.1 mA.
Does the 10302/2/1 come with any approvals?
Yes, it holds CE, TÜV, and UL approvals.
How much space does the module occupy?
It requires 4 TE, 3 HE (4 HP, 3U) of rack space and weighs 0.12 Kg.
