Product No.: 3500/50M 133442-01 - General Introduction
This product is a Redundant DC Power Supply Module for the Bently Nevada 3500 Machinery Protection System. The 3500/50M designates the module's function, and the 133442-01 suffix is its specific hardware assembly part number.
The 3500/50M is the primary power source for a 3500 rack. It is a critical, hot-swappable module that converts an external AC or high-voltage DC input into the regulated, isolated low-voltage DC power (+5V, ±15V, +24V) required by all the monitor modules and system electronics. The "M" suffix often indicates a modern or enhanced version. Its key feature is the ability to be installed in a redundant pair within a single rack, ensuring continuous system operation even if one power supply fails.
Detailed Parameters
| Parameter Category | Specification | Details / Notes |
|---|---|---|
| Module Type | 3500/50M - Redundant DC Power Supply | Installed in the left-most slots of a 3500 rack (slots 1 and 2). A rack can operate with one module, but two provide N+1 redundancy. |
| Physical Dimensions | Height: 318.0 mm (12.52 in) Width: 20.0 mm (0.79 in) - 1 Slot Depth: 193.0 mm (7.60 in) | Standard single-slot module dimensions. Fits into the dedicated power supply slots of the rack frame. |
| Module Weight | Approx. 1.4 - 1.8 kg (3.1 - 4.0 lb) | Heavier than monitoring modules due to internal transformers, heat sinks, and power components. |
| Input Power | 85 to 265 VAC, 47-63 Hz or 90 to 250 VDC | Wide-range, auto-selecting input. Allows connection to standard 120VAC/240VAC plant power or secure 125VDC battery systems. |
| Input Current | ~2.0 A maximum at 120 VAC | Inrush current is managed internally. Requires an external fuse or breaker (typically 5A slow-blow). |
| Output Power (Total) | Up to 130 Watts (continuous) | Sufficient to power a fully loaded 12-slot rack (3500/22) with all monitor modules, displays, and communication cards. |
| Output Voltages | +5 VDC (Logic) ±15 VDC (Analog circuits) +24 VDC (Transducer power, relay coils) | All outputs are isolated, regulated, and protected against overload and short circuits. |
| Redundancy | True N+1 Active Redundant Operation | Two 3500/50M modules share the load equally. If one fails, the other automatically carries the full load without interruption. No field wiring changes are needed. |
| Front Panel Indicators | LEDs: AC Power (Green), DC OK (Green), Fault (Red). | Provides immediate local status of input and output power health. |
| Backplane Communication | Provides system OK and Power Supply Fault status signals to the rack's TDI (Terminal/Display Interface) and monitoring software. | Enables remote alarm notification for power supply issues. |
| Cooling | Convection cooled (no internal fan). | Relies on natural airflow within the panel. Requires proper cabinet ventilation. |
| Operating Temperature | 0°C to +65°C (+32°F to +149°F) | Derating may apply at the upper end of the temperature range. |
| Safety & Compliance | Designed to meet UL, cUL, CE, ATEX/IECEx (for non-incendive field power) standards for industrial environments. | |
| MTBF | Very High (typically > 500,000 hours per module). | Redundant configuration ensures exceptional system-level availability. |
Primary Application Scenarios
The 3500/50M is the foundational power infrastructure for any critical machinery protection system where reliability is non-negotiable.
High-Reliability Turbine & Compressor Control Rooms:
Installed in redundant pairs in the 3500 racks monitoring critical equipment like gas turbines, steam turbines, and centrifugal compressors in power generation and oil & gas facilities. Ensures the protection system remains online during power disturbances or a supply module failure.
Plants with Uninterruptible Power Supplies (UPS) or DC Battery Systems:
Its ability to accept a wide 90-250 VDC input makes it ideal for direct connection to secure 125VDC plant battery banks. This provides the highest level of power security, ensuring the monitoring system remains operational even during a complete AC power blackout.
Safety-Integrated Systems (SIL 2 / Machinery Protection):
The redundancy and diagnostic features support the high availability and fault tolerance requirements for Safety Instrumented Systems (SIS) performing machinery protection functions.
Offshore Platforms & Remote Unmanned Installations:
Its robust design, wide input range, and redundant capability are essential for harsh environments where maintenance windows are limited and system uptime is critical.
System Modernization & Retrofit Projects:
A key component when upgrading older monitoring systems (like 3300 series) to the 3500 platform, providing modern, reliable power for the new rack and its modules. The assembly number 133442-01 ensures the correct revision of hardware for compatibility.
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Each product has been tested by our technicians, providing 12-month long warranty, worry-free after-sales
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- Bulk order enjoys Friendship discount (2 pieces or more can be applied)
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7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
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