Honeywel FC-BKM-0001 Key Switch Module

Product Description

The Honeywell FC-BKM-0001 is a specialized Battery and Key Switch Module developed for the Honeywell Safety Manager platform (an integrated Safety Instrumented System or SIS). This critical module acts as the physical and electrical safeguard for controller memory states, containing backup batteries that retain application program logic during complete system power losses. 

Technical Specifications

• Manufacturer: Honeywell Process Solutions

• Model Model Code: FC-BKM-0001

• System Family Integration: Safety Manager / Safety Manager SC System Architecture

• Hardware Classification: Battery Backup and Maintenance Override Key Switch Module

• Main Operating Input Voltage: 24 Vdc nominal (operational window from -15% up to +30%)

• Main Supply Current Draw: 20 mA maximum per 24 Vdc feed; 7 mA typical shared load setup

• Redundant Logic Rail Input: 5 Vdc ± 10% operating power injection

• Redundant Logic Current Draw: 10 mA maximum current absorption

• Output Voltage Capability: 14 Vdc to 31 Vdc output distribution range

• Output Impedance Value: Approximately 2 x 1.1 kOhm configured in parallel wiring

• Fault Loop Protection: Continuous built-in short circuit proof protection curves

• Safety System Approvals: CE Mark, TUV Rhineland (SIL certified), UL listed, CSA, Factory Mutual (FM)

• Physical Module Dimensions: 176 mm Height x 35.2 mm Width x 212 mm Depth

• Net Hardware Mass: 0.5 kg (1.10 lbs) slim-line board layout

• Total Gross Shipping Mass: 2.0 kg (4.41 lbs) fully packaged protective layout

Industrial Application Scenarios

• Safety Instrumented System Backing: Secures the running safety loop logic within an offshore oil drilling rig’s emergency shutdown (ESD) matrix if primary power buses drop out.

• Maintenance Bypass Overriding: Uses the physical key switch to grant field technicians temporary override authority ("Force Enable") to safely test field instruments without causing a plant trip.

• High-Reliability Burner Management: Keeps critical boiler burner logic parameters alive inside chemical processing facilities during unstable substation power switchings.

• TUV SIL-Class Panel Expansion: Installs into standard multi-slot Safety Manager chassis assemblies to comply with strict international functional safety rules.