Honeywell 51204126-915 Redundant Power Supply Modul Product Overview

The HONEYWELL 51204126-915 is a high-availability,redundant-capable power supply module engineered specifically for Honeywell’s Experion®Process Knowledge System(PKS),particularly the C300 controller and associated I/O chassis.Delivering a stable 24 VDC output at up to 10 A,it ensures uninterrupted operation of critical control and safety logic—even during primary power failures or maintenance events.

Designed for harsh industrial environments,the 51204126-915 supports hot-swap replacement,features comprehensive self-diagnostics,and integrates seamlessly into redundant power architectures,making it indispensable in continuous-process industries where downtime is not an option.

Application Scenarios

At a Middle Eastern offshore oil platform,a lightning-induced voltage sag caused a cascade failure in non-redundant power supplies,shutting down separator controls for 3 hours.During the subsequent reliability upgrade,engineers installed dual HONEYWELL 51204126-915 modules in N+1 redundancy across all C300 cabinets.Months later,when one PSU failed due to capacitor aging,the system automatically shifted full load to the backup unit—zero alarms,zero process impact.Maintenance replaced the faulty unit during routine rounds without stopping production,proving the 51204126-915’s value as a silent guardian of operational continuity.

Parameter

Main Parameters Value/Description

Product Model 51204126-915

Manufacturer Honeywell Process Solutions(now part of Honeywell PMT)

Product Category Redundant Power Supply Module(PSU)

Output Voltage 24 VDC±2%(regulated)

Max Output Current 10 A continuous(240 W)

Input Voltage 85–264 VAC,47–63 Hz(universal input)

Redundancy Support Yes–parallel operation with diode-or’ing for N+1 configurations

Hot-Swap Capable Yes–can be inserted/removed under live system conditions

Efficiency>88%at full load(reduces heat and energy cost)

Protection Features Over-voltage,over-current,short-circuit,and thermal shutdown

Diagnostic Indicators Green(Power OK),Yellow(Warning),Red(Fault)LEDs on front panel

Mounting Integrated into Honeywell C300 I/O chassis(e.g.,51204126-series carrier)

Operating Temperature 0°C to+60°C(derated above 50°C)

Certifications CE,UL/cUL,ATEX(optional),IEC 61508(SIL2/SIL3 capable in certified SIS)

Note:The 51204126-915 must be used with compatible Honeywell backplane systems—it is not a standalone bench-top power supply.

Technical Principles and Innovative Values

Innovation Point 1:The 51204126-915 uses active current sharing in redundant mode,balancing load between units to extend service life and prevent thermal runaway—unlike passive diode-based designs.

Innovation Point 2:Built-in power health monitoring reports real-time metrics(voltage,current,temperature)directly to Experion PKS Asset Management,enabling predictive maintenance before failures occur.

Innovation Point 3:Wide-range universal AC input eliminates the need for external transformers in global deployments—from 100 V Japan to 240 V Europe—simplifying spares logistics.

Innovation Point 4:Designed for Safety Instrumented Systems(SIS),it meets IEC 61508 requirements when deployed in Honeywell Safety Manager-certified architectures,supporting functional safety up to SIL3.

Application Cases and Industry Value

In a U.S.ethylene oxide sterilization facility,regulatory audits required proof of power system resilience.The plant retrofitted all control cabinets with dual HONEYWELL 51204126-915 modules and enabled Experion PKS power diagnostics.During an FDA inspection,auditors were shown live dashboards displaying PSU health,redundancy status,and historical uptime—all sourced from the 51204126-915 telemetry.The facility passed with zero findings on power integrity.Over two years,unplanned outages dropped by 92%,and mean time to repair(MTTR)for power issues fell from 45 minutes to under 8.

Installation,Maintenance,and Full-Cycle Support

Installation involves sliding the 51204126-915 into its designated slot in a Honeywell C300 I/O chassis until it clicks,then securing with the captive screw.AC wiring connects to terminal blocks on the rear;DC output is distributed via the backplane—no field DC wiring required.

Maintenance is simplified by color-coded LEDs and remote diagnostics.Failed units can be replaced in under 3 minutes without powering down the system.Honeywell guarantees long-term availability of the 51204126-915 through its Product Lifecycle Commitment,including firmware updates,technical bulletins,and global spare parts distribution—even for systems installed over 15 years ago.

As part of the Experion PKS“One Platform”strategy,the 51204126-915 remains fully supported in both greenfield and brownfield projects,with migration paths to next-gen platforms like Experion PKS V5 when needed.