PLCs, Power Supplies & Others

Cooling Purpose and System Role

This fan assembly provides forced-air cooling for heat-generating components in drive cabinets. It maintains safe operating temperatures for power semiconductors and control boards. You can install this unit in motor control centers and variable frequency drive enclosures. It actively draws ambient air across heatsinks and internal chassis surfaces. The assembly reduces thermal stress on neighboring electronic modules significantly. This cooling solution extends the overall service life of sensitive automation equipment.

Physical Dimensions and Mounting Configuration

The Reliance Electric 45C335 measures 148.2 mm in height and 147.8 mm in width. Its depth reaches 72.5 mm from the intake grille to the exhaust flange. This assembly weighs approximately 1.15 kg, which allows for one-handed installation. You can mount the unit using four M5 screws through the pre-drilled corner holes. Alternatively, you may secure it with the included spring clips onto a DIN rail adapter. The die-cast aluminum frame provides excellent rigidity and vibration damping characteristics.

Fan Motor Specifications and Bearing Design

This assembly features a brushless DC motor with a rated speed of 3,200 RPM. The motor uses dual shielded ball bearings for extended operational longevity. These bearings operate quietly with a typical noise level of 48 dBA. The Reliance Electric 45C335 draws 340 mA from a 24 VDC supply at full speed. An integrated hall-effect sensor provides a tachometer signal for speed monitoring. This feedback allows the host system to detect fan stall or degradation.

Airflow Performance and Static Pressure

This fan delivers 92 CFM of free air movement at zero static pressure. It generates a maximum static pressure of 85 Pa against restricted airflow paths. The impeller design uses seven forward-curved blades for optimal efficiency. You can place this assembly in either horizontal or vertical orientation. The airflow direction travels from the intake side to the exhaust side. This configuration aligns with typical cabinet ventilation patterns for electronics cooling.

Electrical Interface and Connection Details

A 2-meter pigtail cable terminates with a 4-pin Molex connector for power integration. The cable uses 18 AWG conductors with PVC insulation for flexibility and durability. You will find a second 2-pin connector for the tachometer signal output. This signal provides a square wave frequency proportional to the fan speed. The Reliance Electric 45C335 also includes a third wire for locked-rotor alarm indication. This alarm triggers when the fan fails to rotate for more than 2 seconds.

Internal Component Composition

The motor assembly contains 18 gauge windings on a laminated stator core. You will find a permanent magnet rotor with four poles for smooth torque generation. The control PCB houses six power MOSFETs for electronic commutation. A dedicated microcontroller manages the commutation sequence and speed regulation. The unit includes a thermal fuse that opens at 95°C for overtemperature protection. This fuse prevents coil damage during extreme operating conditions.

Environmental Tolerances and Operational Range

The Reliance Electric 45C335 functions reliably across temperatures from -10°C to 70°C. It withstands relative humidity levels between 10% and 90% without corrosion effects. The fan meets IP54 protection standards against dust ingress and water splashes. Vibration tolerance reaches 2 G from 10 Hz to 500 Hz along each axis. Shock resistance measures 10 G for 11 milliseconds duration. These specifications suit installations in pumping stations and machine tool environments.

Technical Data Summary

Maintenance Indicators and Service Life

This assembly includes a replaceable air filter on the intake side for dust protection. You can clean this filter using compressed air every 500 operating hours. The fan also provides an LED status indicator for visual health monitoring. A green light confirms normal operation, while red signals a fault condition. The expected service life reaches 50,000 hours under nominal operating conditions.

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