Honeywell FS-BKM-0001 Battery And Key Switch Module

The Honeywell FS-BKM-0001 is a Battery and Key Switch Module designed to provide backup power and manual control capabilities within Honeywell’s TotalPlant Solution (TPS) Distributed Control System (DCS). It ensures system reliability by maintaining essential functions during power interruptions and offers operators the ability to manually control system states via integrated key switches.​

Product Specifications

Product Applications

The FS-BKM-0001 module is utilized in various industrial settings, including:​

• Process Industries: Ensures continuous operation of control systems in chemical, oil and gas, and petrochemical plants.​

• Power Generation: Maintains safety systems in power plants, including nuclear and fossil fuel facilities.​

• Manufacturing Facilities: Provides reliable backup and manual control in automated manufacturing environments.​

• Water Treatment Plants: Supports uninterrupted control in water purification and distribution systems.​

Product Advantages

• Reliable Backup Power: Built-in battery ensures uninterrupted operation during power outages.​

• Manual Control Capability: Integrated key switches allow operators to manually control system states, enhancing safety and flexibility.​

• Compact Design: Space-saving dimensions facilitate easy integration into existing control panels.​

• Robust Construction: Designed to withstand harsh industrial environments with high ingress protection.​

• Regulatory Compliance: Meets international safety standards and certifications, ensuring global applicability.​

Frequently Asked Questions (FAQ)

1. What is the primary function of the FS-BKM-0001 module in an industrial control system?

The FS-BKM-0001 ensures uninterrupted operation during power failures by supplying backup power. Additionally, it provides a manual key switch for local control, essential during maintenance or emergency overrides.

2. Can the FS-BKM-0001 be installed in both redundant and non-redundant system configurations?

Yes, it supports both setups. In redundant systems, it adds an extra layer of safety by supplying backup power independently to each controller path, while in non-redundant systems, it maintains core functionality during unexpected outages.

3. Does the module support hot-swapping, or must the system be powered down for maintenance?

The battery component of the FS-BKM-0001 is not hot-swappable. For safety and system integrity, the power should be isolated before replacing or servicing the module.

4. What type of key is used in the switch mechanism, and is it field-replaceable?

The key switch uses a mechanical lock-and-turn system, with keyed access for authorized personnel only. Replacement keys are available through Honeywell if needed and can be swapped in the field without recalibration.

5. How does the FS-BKM-0001 communicate its battery status to the main controller?

Battery health and charge status are monitored internally and reported via connected system diagnostics. Some configurations use discrete I/O lines or serial diagnostics to convey these states.

6. What are the typical failure modes associated with this module, and how can they be identified?

Common failure points include battery degradation and key switch contact wear. These can be identified through dim or absent status LEDs, erratic system behavior during switchover, or via system alarms triggered by voltage drop detection.

7. Is the FS-BKM-0001 compliant with safety standards such as SIL or IEC 61508?

Yes, the module is part of Honeywell’s safety instrumented system (SIS) lineup and adheres to SIL-rated design practices under IEC 61508. It plays a supporting role in achieving functional safety in critical process environments.

8. What kind of maintenance schedule is recommended for optimal reliability?

Routine inspection every 6–12 months is advised. This includes battery voltage testing, verifying LED indicators, and cycling the key switch to prevent mechanical sticking or failure.

9. Can multiple FS-BKM-0001 modules be used in a distributed safety architecture?

Absolutely. In large systems, multiple modules can be deployed across various zones or nodes to localize power backup and key-switch control, improving modularity and maintainability.

10. How do I verify that the key switch is engaged without accessing the panel?

Many installations route the switch position to the system HMI or SCADA screen through a status relay or digital input channel, allowing operators to view the switch state remotely.