Description

• Model: FC-BKM-0001
• Brand: Honeywell
• Series: Safety Manager
• Core Function: Maintains controller backup power and key-switch functions
• Type: Battery and Key Switch Module
• Key Specs: 24 VDC supply, dual lithium batteries, Force Enable and Reset switches

Product Introduction

The HONEYWELL FC-BKM-0001 is the conformal-coated Battery and Key Switch Module (BKM) used in Honeywell Safety Manager controller chassis. Honeywell’s Safety Manager documentation identifies the BKM as a controller-chassis assembly containing two batteries, a Force Enable key switch, a Reset key switch, and three 24 VDC general-purpose inputs on the controller backplane.

This is a small module, but its job is important. The two batteries provide backup for the two control processors, while the keyed controls support defined service and controller-management functions. Published specifications list 24 VDC operation, a 5 VDC auxiliary supply, and an operating range of -5°C to +70°C. For a Safety Manager spare, battery condition and revision should be checked before installation—not just the board itself.

Key Technical Specifications

The electrical and battery figures above are published by secondary industrial sources for the FC-BKM-0001; the current unit label and applicable Honeywell documentation should control where a revision differs.

HONEYWELL FC-BKM-0001

Application and Selection Notes

The module is installed in the Safety Manager controller chassis. Honeywell documentation states that one BKM-0001 is used even when the controller chassis is redundant. The assembly includes two batteries, the Force Enable and Reset key switches, and three 24 VDC general-purpose inputs associated with the controller backplane.

That architecture makes the part quite different from an ordinary battery holder or panel key switch. Replacement should be based on the complete Safety Manager configuration, module revision, battery condition, and chassis arrangement.

For a new control project, this is a legacy-specific spare. For an existing Safety Manager installation, keeping one tested replacement on the shelf can make more sense than waiting for a battery-related controller issue to become a shutdown problem.

Advantages and Limitations

Advantages

• Dedicated Honeywell Safety Manager controller-chassis assembly
• Contains two processor backup batteries
• Includes Force Enable and Reset keyed controls
• Conformal-coated FC- configuration
• Compact controller-chassis format
• Suitable for planned Safety Manager MRO inventory

Limitations

This is not a generic 24 V battery module. The key switches, battery interface, backplane connections, and controller architecture are system-specific.

Battery age also matters. A visually perfect surplus module can still require battery-life verification before being placed into critical service.

Global Procurement and Shipping Notes

There is one logistics point worth flagging. Because this assembly contains lithium thionyl chloride batteries, the supplier and forwarder should confirm the applicable dangerous-goods classification and carrier requirements before shipment. Do not assume that ordinary electronics shipping rules apply.

Quality Inspection and Test SOP

1. Inbound inspection

Verify the FC-BKM-0001 identification, serial number, revision, battery markings, key-switch condition, connectors, and overall housing. Check for corrosion, cracked components, battery leakage, swelling, or evidence of previous repair.

2. Live test

Use an approved Honeywell Safety Manager test environment where available. Verify controller recognition, Force Enable and Reset switch operation, relevant backplane inputs, and battery-status diagnostics. Record actual results in a Test Report.

3. Electrical testing

Verify supply-voltage behavior and grounding continuity according to the applicable Honeywell procedure. Do not apply an arbitrary high-voltage insulation test across the battery electronics.

4. Battery and configuration verification

Record the installed battery type and manufacturing/storage information where available. Photograph key-switch positions, connectors, and module identification before replacement.

5. Final QC

Protect the module against ESD and physical shock. Where batteries are included, package and mark the shipment according to the applicable transport requirements. Attach a QC Passed label with the inspection date.

Common Replacement Risks

Battery condition: Shelf age matters. The module can look new while the installed batteries have already consumed part of their expected service life.

Key-switch mismatch: Force Enable and Reset functions are part of the assembly. Check the key arrangement and switch operation before commissioning.

Revision mismatch: Do not assume every BKM-0001 listing has the same internal revision or battery configuration.

Shipping restrictions: Lithium thionyl chloride batteries can trigger carrier documentation requirements. Confirm the shipping classification before dispatch.

ESD damage: Handle the module with a grounded wrist strap and ESD-safe work surface.

One practical habit: photograph the battery labels before the module leaves the warehouse. That gives the buyer a useful traceability record if the unit is going into long-term MRO storage.

Related Models

BKM-0001: Base Battery and Key Switch Module designation used in Honeywell Safety Manager documentation. The FC- prefix identifies the conformal-coated product family.

FC-PSU-UNI2450: Honeywell Safety Manager system power supply for the 24 VDC-class architecture; it performs a different function and is not a substitute for the BKM module.

FC-PSU-UNI4825: Safety Manager power-supply configuration for higher-voltage DC distribution, again separate from the BKM function.

Honeywell Safety Manager Controller: The controller chassis in which the BKM assembly is installed.

Quick Conclusion

• Honeywell Safety Manager Battery and Key Switch Module.
• Contains two processor backup batteries.
• Includes Force Enable and Reset key switches.
• Uses 24 VDC system power and a 5 VDC auxiliary supply.
• Operating range is published as -5°C to +70°C.
• Battery age and shipping requirements should be checked before procurement.
• Best suited as a configuration-matched spare for an existing Safety Manager controller chassis.

FAQ

What is the HONEYWELL FC-BKM-0001?

It is the Safety Manager Battery and Key Switch Module installed in the controller chassis. It contains two batteries and keyed controller functions.

How many batteries are inside?

Honeywell documentation describes two batteries, with one assigned to each Control Processor.

What battery is used?

Published supplier specifications identify the battery as the SAFT LS14500CFG, a 3.6 V nominal lithium thionyl chloride cell with capacity above 2 Ah.

What is the operating temperature?

Published specifications give an operating range of -5°C to +70°C and storage from -40°C to +85°C.

Can FC-BKM-0001 be replaced by a generic battery module?

No. The assembly includes system-specific key switches, battery interfaces, and controller-backplane connections.

What should buyers verify before ordering?

Confirm the complete part number, module revision, battery condition, key-switch operation, Safety Manager chassis compatibility, physical stock, warranty, and lithium-battery shipping requirements.