Description
Honeywell 51402455-100 MP-DNCF02-200
Technical Specifications Dual axial fan arrangement; rack backplane 24VDC supply; nominal fan current rated for TDC3000 rack; tachometer output for each fan; operating temperature 0℃ to 60℃; storage temperature -40℃ to 85℃; humidity 5% to 95% non-condensing; fan lock and low speed fault detection; slide-in rack mounting.
Functional Features It draws ambient cabinet air through the rack and blows it vertically across installed boards to remove heat from CPUs and power devices. It independently monitors tachometer feedback from each fan. It reports fan stall or low speed faults to the node processor. The remaining fan can maintain basic cooling during single fan failure. The whole assembly slides out for rapid replacement.
Application Scenarios Cooling for TDC3000 LCN dual node racks; forced ventilation for Universal Station racks; replacement of aging fan assemblies in TPS control cabinets; auxiliary cooling for NIM node racks in petrochemical control rooms.
Performance Parameters Total airflow satisfies the thermal load of a fully populated dual node rack; tachometer fault detection is continuous; fan bearing MTBF meets industrial continuous duty rating; ducted air path prevents recirculation.
Material Composition Fan frames are flame retardant ABS plastic; fan impellers use glass filled nylon; fan motors are brushless DC units; monitoring PCB is FR4 flame retardant; slide rail housing is reinforced engineering plastic.
Structural Characteristics Slide-in drawer style assembly that fits a dedicated fan slot in the TDC3000 rack; front panel carries power and fan fault LEDs; two axial fans mounted in parallel; rear connector mates with rack backplane; cable strain relief molded into housing.
Working Principle Rack backplane 24VDC feeds the fan assembly. Two brushless DC fans spin at constant rated speed, drawing air through the rack. The monitoring circuit samples tachometer pulses from each fan. Loss of pulses or abnormal low RPM triggers a fault signal routed to the node processor for alarm reporting.
Installation Requirements Slide the assembly into the dedicated fan slot until the rear connector mates fully. Orient the air flow direction according to the label on the housing. Keep cabinet intake filters clean. Maintain clearance for air intake at the bottom of the rack.
Usage Notes The 200 revision runs at fixed speed without temperature control. Remove the assembly only during maintenance because loss of forced cooling causes rapid over-temperature. Clean dust from impellers and filters regularly. Do not run the cabinet for extended periods on a single fan.
