Honeywell 10302/1/1 FSC Power Monitoring Module

Description

Key Technical Specifications

• Model Number: 10302/1/1
• Module Type: Watchdog Repeater (WDR)
• System: Honeywell FSC Fail Safe Controller
• Primary Function: Monitors 5 VDC and 24 VDC supplies serving FSC I/O modules
• Supply Requirement, 5 VDC: 35 mA, excluding WDROUT output current
• Supply Requirement, 24 VDC: 25 mA
• WDG1 + WDG2 Input Current: 0.1 mA
• Approvals: CE, TÜV, UL
• Software Versions: All
• Space Requirement: 4 TE × 3 HE (4 HP × 3U)
• Rack Connection: Horizontal bus connection required
• Connector: DIN 41612 Type F, using the d and z rows
• Module Code: A27
• Rack Coding: Blind stops C3, C19, C31; large pin A27

The technical data above is based on the FSC hardware documentation for the exact 10302/1/1 module.

Product Introduction

The Honeywell 10302/1/1 is an FSC Watchdog Repeater (WDR) used to monitor the 5 VDC and 24 VDC power supplies associated with FSC I/O sections. Its watchdog output connects to the watchdog inputs of monitored output modules, making it part of the power supervision architecture rather than a standard PLC I/O module.

The module is particularly relevant in multiple-PSU arrangements, certain external 24 VDC supply configurations, high watchdog-current applications, and systems combining redundant and non-redundant I/O. For legacy FSC installations, the exact 10302/1/1 designation matters because its rack position and watchdog architecture must match the existing system design.

Installation & Configuration Guide

Stage 1: Pre-Installation Preparation — Approximately 5 Minutes

1. ⚠️ Notify operations and place the affected process in a safe state.
2. Follow the site’s approved shutdown and lockout/tagout procedure.
3. Do not assume the module can be replaced without system impact. The FSC documentation states that although the 10302/1/1 may be exchanged with power applied, the Central Part can shut down; in certain redundant Central Part/non-redundant I/O configurations, both Central Parts can shut down.
4. Wear an ESD grounding strap and use appropriate ESD protection.
5. Photograph the existing rack layout and document the module position.
6. Record the 5 VDC and 24 VDC supply arrangement before removing the module.
7. Inspect the replacement label carefully. Confirm it reads Honeywell 10302/1/1, not 10302/2/1 or another FSC special-function module.

The FSC hardware documentation specifically describes 10302/1/1 as a horizontal-bus module that must be installed in the I/O section containing the output modules it monitors.

Stage 2: Removing the Old Module — Approximately 5 Minutes

1. Verify that the approved maintenance state has been established.
2. Remove the module only after documenting its exact rack position.
3. Release the module using the normal FSC rack removal procedure.
4. Pull the module straight out without twisting or forcing it.
5. Inspect the mating connector and backplane for bent contacts, contamination, or mechanical damage.
6. Keep the removed module available until the replacement passes operational checks.

⚠️ Critical point: Do not move the replacement to another I/O section merely because there is an empty rack position. The watchdog repeater must monitor the output modules located in its own I/O section.

Stage 3: Installing the New Module — Approximately 5 Minutes

1. Confirm the exact model number: 10302/1/1.
2. Check that the target location provides the required horizontal bus connection.
3. Verify that the rack coding matches the module requirements before insertion.
4. Align the module carefully with the rack connector.
5. Insert the module straight into position and secure it according to the FSC rack procedure.
6. Inspect the seating position before restoring power.

Self-Checklist:

• Exact model number verified
• Correct FSC I/O section selected
• Horizontal bus position confirmed
• Rack coding checked
• Module fully seated
• No connector damage observed

Stage 4: Power-On & Testing — Approximately 10–15 Minutes

1. Restore the system according to the site’s approved startup procedure.
2. Verify the 5 VDC and 24 VDC supply conditions using approved measurement points.
3. Check the FSC diagnostic status for watchdog or power-supply faults.
4. Confirm that the monitored output modules receive the expected watchdog supervision.
5. Perform functional testing appropriate to the site’s safety procedures before returning the process to service.
6. Record the replacement date, module serial number, and test results in the maintenance history.

⚠️ Troubleshooting Note: If the system reports a watchdog-related fault after replacement, first verify the module location, power-supply arrangement, rack coding, and whether the monitored output modules belong to the same I/O section. Do not bypass watchdog circuits to force a system restart.

The FSC documentation also specifies that a WDR is required in several defined architectures, including multiple-PSU arrangements and configurations with redundant and non-redundant I/O. Verify the installed architecture before changing the module arrangement.

10302/1/1

10302/1/1

Frequently Asked Questions (FAQ)

Q1: What does the Honeywell 10302/1/1 actually do?

It is a Watchdog Repeater (WDR) for the Honeywell FSC system. It monitors the 5 VDC and 24 VDC supplies associated with I/O modules and provides a watchdog output to the watchdog inputs of monitored output modules. It is not an 8-channel digital output module; some third-party listings appear to misclassify it, so the FSC hardware documentation should take priority for identification and specifications.

Q2: Can I hot-swap the Honeywell 10302/1/1 under power?

The hardware documentation states that the module may be exchanged with the power supply switched on, but that does not mean the replacement is operationally risk-free. The Central Part will shut down, or both Central Parts may shut down in certain redundant Central Part/non-redundant I/O configurations. For a safety system, follow the site’s approved maintenance and shutdown procedure rather than treating this as a routine hot swap.

Q3: Is the Honeywell FSC 10302/1/1 obsolete?

Yes. Honeywell states that the FSC platform is no longer available for purchase and has been replaced by Safety Manager, although spare parts are still available. That makes exact-model verification important when sourcing replacement stock for an installed FSC system.

Q4: Can I replace a 10302/1/1 with a 10302/2/1?

Do not assume so. Both are FSC Watchdog Repeater modules, but they are separate type numbers. Before substitution, compare the exact FSC hardware documentation, rack coding, system revision, and installed configuration. For a safety-related application, replacement compatibility should be verified against the site’s approved engineering documentation.

Q5: Where should the 10302/1/1 be installed?

It requires a horizontal bus connection and must be installed in the I/O section containing the output modules it monitors. The FSC documentation specifically warns against arranging watchdog repeaters in redundant I/O configurations so that they control the other I/O section.

Q6: Does replacing this module affect the application programming?

The 10302/1/1 itself is a special-function watchdog repeater rather than the FSC Central Part CPU or memory module. A physical replacement should not be treated as a programming change by default. However, because it participates in power and watchdog supervision, document the existing FSC configuration and verify the complete safety function after replacement.

Q7: What condition should I expect when buying this obsolete spare part?

For a discontinued FSC component, availability can include New Original/New Surplus or Refurbished (tested) stock. Confirm the actual condition before purchase. For new surplus, request clear nameplate photos and packaging details. For tested surplus or refurbished stock, request the test scope and recorded results. Honeywell’s own current FSC information confirms the platform is discontinued, so availability depends on the spare-parts market rather than normal new-production supply.