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The Bently Nevada 78432-02 is a Power Input Module (PIM) used in the 3300 Series machinery monitoring system. Installed at the rear of the rack behind the power supply and system monitor, it provides the electrical input connections and interface wiring required by the rack’s power supply arrangement.
In a rotating equipment monitoring installation, the 3300 rack collects vibration, shaft position, speed, and other machinery condition measurements from monitoring modules. The 78432-02 supports the rack’s power-input arrangement, helping connect the incoming AC supply to the associated power supply and providing connection points for designated system functions.
This module is particularly relevant when maintaining an existing 3300 monitoring rack. If the rack experiences a power-input connection problem or the rear power-input assembly requires replacement, the PIM reference, input-voltage configuration, wiring, and associated power supply must be checked together. The 78432-02 is associated with the 110 VAC input version of the 3300/10 power supply arrangement, so it should not be selected solely by physical appearance.
Unlike the monitoring modules installed at the front of the rack, the 78432-02 is part of the rear power and interface assembly. It does not measure vibration or calculate machinery condition values. Its role is associated with power entry and the electrical connections needed by the monitoring system.
For maintenance work, confirm the rack model and power supply configuration before removing the module. Input voltage, fuse selection, transformer connections, and the rear-panel wiring arrangement must match the existing installation.
| Parameter | Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Model | 78432-02 |
| Product Family | 3300 Series |
| Product Type | Power Input Module |
| Assembly Type | Printed Circuit Board Assembly |
| Primary Function | Power input and rear-rack interface connections |
| Compatible System | Bently Nevada 3300 Series Monitoring System |
| Associated Power Supply | 3300/10 Power Supply |
| Input Voltage Version | 110 VAC |
| AC Input Frequency | 50/60 Hz, subject to the associated power supply configuration |
| Installation Position | Rear of the rack, behind the power supply and system monitor |
| Power Supply Connection | Connects with the associated power supply and transformer assembly |
| System Interfaces | Connections for designated rack control and monitoring functions |
| Monitoring Function | Does not perform direct vibration measurement |
| Dimensions | 180 × 45 × 130 mm |
| Weight | 0.24 kg |
The 78432-02 works within the power-input section of a 3300 monitoring rack. Incoming AC power is connected through the rack’s designated power-input wiring. The associated transformer and power supply convert the incoming supply into the operating power required by the monitoring system.
AC Supply → 78432-02 Power Input Module → Associated Transformer and Power Supply → 3300 Rack Electronics
The PIM also forms part of the rear interface arrangement. Depending on the rack configuration, the associated wiring and connections support designated control functions and system interfaces. These connections are distinct from the signal inputs used by vibration and position monitoring modules.
For example, if a machine protection rack loses power, the troubleshooting process may involve checking the incoming supply, the configured input-voltage range, fuses, wiring, transformer assembly, and power supply. The 78432-02 may be part of that investigation, but replacing it alone will not resolve a fault caused by the upstream supply or another rack component.
The module’s voltage version is an important selection point. A replacement must match the existing power-input configuration rather than being chosen simply because it belongs to the 3300 Series.
The 78432-02 occupies the power-input position in the rear section of the 3300 rack. It supports the power supply and designated interface connections, while the rack’s monitoring modules handle machinery measurement and condition monitoring.
AC Power Source → Power Input Assembly → Power Supply → 3300 Monitoring Rack → Monitoring and Protection Functions
| System Element | Function |
|---|---|
| 78432-02 Power Input Module | Provides power-input and associated rear-rack interface connections |
| 3300/10 Power Supply | Converts incoming AC power into the operating supplies required by the rack |
| Transformer Assembly | Forms part of the power conversion arrangement |
| 78422-01 Regulator Board | Associated regulator board listed for the 3300/10 power supply |
| 3300 Rack Chassis | Houses and interconnects the system modules |
| 3300 System Monitor | Monitors overall rack status and system health |
| Vibration Monitor Modules | Process vibration-related signals from connected transducers |
| Position Monitor Modules | Process shaft position, thrust, or related measurement signals according to module type |
| Keyphasor Transducer | Supplies rotational reference information for compatible monitoring functions |
| External Alarm Circuit | Receives configured system status or alarm indications |
The exact interface functions depend on the installed 3300/10 power supply version and rack configuration. The 78432-02 should therefore be treated as part of a specific power-input assembly, not as a universal replacement for every 3300 Series PIM.
| Application | Typical Use |
|---|---|
| Turbine Monitoring Systems | Supporting the power-input arrangement of a 3300 rack used for turbine condition monitoring |
| Compressor Protection | Maintaining the rack power assembly in machinery protection installations |
| Pump Monitoring | Supporting continuous operation of monitoring racks used to assess pump condition |
| Industrial Motor Monitoring | Maintaining the power-input section of a rack monitoring large rotating equipment |
| Oil and Gas Facilities | Supporting existing 3300 monitoring installations used on critical machinery |
| Power Generation | Maintaining rack power connections in turbine and generator monitoring systems |
| Process Plants | Supporting machinery protection racks used for continuous equipment monitoring |
| Maintenance and Overhaul | Replacing a verified faulty or damaged power-input module during rack service |
| Legacy Monitoring Systems | Maintaining installed 3300 Series equipment where the existing rack configuration must be retained |
The power-input assembly contains hazardous electrical connections. Installation and servicing should be performed only after the supply has been isolated and the absence of hazardous voltage has been verified.
| Component | Function |
|---|---|
| Bently Nevada 3300/10 Power Supply | Supplies operating power to the 3300 monitoring rack |
| Bently Nevada 78422-01 Regulator Board | Associated regulator board for the 3300/10 power supply |
| Transformer Assembly | Forms part of the AC power conversion arrangement |
| 3300 Rack Chassis | Houses the power supply, system monitor, and monitoring modules |
| 3300 System Monitor | Monitors rack status and system health |
| Power Input Wiring | Connects the incoming supply to the power-input assembly |
| Rack Grounding Connections | Provide the designated grounding path for the installation |
| Vibration Monitor Modules | Process vibration signals from compatible transducers |
| Keyphasor Interface | Connects rotational reference signals to compatible monitoring functions |
| External Alarm Circuit | Receives configured system status or alarm signals |
| Model / Product | Product Type | Typical Application |
|---|---|---|
| Bently Nevada 78432-02 | Power Input Module | Reference part for the 110 VAC 3300/10 power-input arrangement |
| Bently Nevada 3300/10 | Power Supply | Supplies operating power to a compatible 3300 monitoring rack |
| Bently Nevada 78422-01 | Regulator Board | Related power-supply regulator assembly |
| Bently Nevada 84039-02 | Power Input Module Variant | Related PIM reference associated with a hermetically sealed OK relay and serial interface configuration |
| Bently Nevada 81025-02 | Power Input Module Variant | Related PIM reference associated with an internal-barrier configuration |
The models above serve different purposes within the 3300 power-input and power-supply family. The 3300/10 and 78422-01 are related system components rather than direct replacements for the 78432-02. The 84039-02 and 81025-02 have different configuration features and should not be treated as interchangeable without confirming the required interfaces, barriers, relay arrangement, and rack configuration.
No. The 78432-02 is a Power Input Module. It supports the rack’s power-entry and associated interface connections; vibration and other machinery measurements are processed by the appropriate monitoring modules installed in the 3300 rack.
No. Its input-voltage version and interface arrangement must match the associated power supply and rack configuration. The 78432-02 is associated with the 110 VAC 3300/10 arrangement, so the exact installed configuration should be confirmed before replacement.
Check the incoming AC supply, input-voltage configuration, fuse selection, wiring, transformer assembly, and associated power supply. Also inspect the module connections and regulator board if the fault persists. A failed rack power-up does not by itself prove that the PIM is defective.
Not automatically. The 84039-02 is a related power-input module variant with a different interface and relay configuration. Confirm the rack’s required functions and the exact power-input assembly configuration before considering substitution.