Introduction
The 3500/25-01-02-01 is a Power Supply Module for the Bently Nevada 3500 Machinery Protection System. It is designed to mount in the designated slot on the left side of a 3500 rack. Its primary function is to convert the plant's raw DC power source into clean, regulated, and redundant DC voltages required to operate all monitoring, relay, and communication modules within the 3500 rack.
The "-01-02-01" suffix in the part number specifies key options:
-01: Likely indicates a specific input voltage range (e.g., 18-32 VDC).
-02: Likely indicates a specific output power rating or revision level.
This module ensures system reliability, often operating in a redundant (primary/backup) configuration with a second 3500/25 module to provide uninterrupted power in case of a single power supply failure.
Parameters / Specifications
The key technical and physical specifications are summarized in the table below.
| Parameter Category | Specification |
|---|---|
| Module Type | Rack Mounted Power Supply |
| Part Number | 3500/25-01-02-01 |
| System Compatibility | Bently Nevada 3500 Rack / Frame (mounts in left-side slot) |
| Primary Function | Provides operating power (+15V, -15V, +5V) to all modules in the 3500 rack via the backplane. |
| Input Voltage (Typical) | 18 - 32 VDC (Common for 24VDC plant supply). Note: The "-01" often denotes this 24VDC nominal input range. Other suffixes indicate 125VDC or other input voltages. |
| Output Voltages | +5 VDC, +15 VDC, -15 VDC (to the rack backplane). |
| Output Power | Typically in the range of 120-150 Watts, sufficient to power a fully loaded rack. |
| Redundancy | Designed for 1-out-of-2 redundant operation. A second 3500/25 module can be installed in the rack to share the load and provide automatic backup. |
| Status Indicators | LEDs for Power OK, Power Fail, and Module Fault. |
| Dimensions (H x W x D) | Approx. 128 mm x 45 mm x 190 mm (This module is wider than standard monitor modules to occupy the special power supply slot). |
| Weight (Approx.) | 0.8 kg (1.76 lbs) |
| Operating Temperature | 0°C to +65°C (+32°F to +149°F). |
| Mounting | Installs in the dedicated left-side power supply slot of a 3500 series rack. |
Important: The exact input voltage range and output power are defined by the specific part number suffix. The 3500/25-01-02-01 is a common configuration for 24VDC systems. Always verify the datasheet for the specific application.
Application Scenarios
The 3500/25 Power Supply Module is the foundational power hub for the entire 3500 monitoring system. Its application is universal, but its critical role is emphasized in the following scenarios:
Foundation for All 3500 Systems: Every 3500 rack housing vibration, position, temperature, or speed monitors requires at least one 3500/25 module to function. It is a non-optional core component for system operation.
High-Availability / Critical Machinery Protection: For turbines, compressors, and large pumps in refineries, power plants, and offshore platforms, a redundant power supply configuration (two 3500/25 modules) is standard. This ensures the monitoring and protection system remains online even if one power supply fails, preventing a single point of failure that could lead to a blind spot in machine protection.
Plants with Unstable DC Power Sources: It conditions and regulates the often-noisy plant DC supply, providing clean, stable power to sensitive monitoring electronics, ensuring measurement accuracy and module longevity.
Extended Rack Configurations: In racks fully loaded with monitor modules (e.g., 16 channels), the power supply's adequate wattage rating is crucial to support the total load without degradation.
System Integration Racks: In racks that include communication gateway modules (like the 3500/92), which may have higher power demands, a properly specified 3500/25 module is essential for reliable data transmission to plant DCS or asset management systems.
In summary, the 3500/25-01-02-01 is not merely a component but the beating heart of the 3500 rack. It provides the reliable, conditioned power that enables all other monitoring and protection modules to perform their vital roles in safeguarding high-value industrial machinery.
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