The Bently Nevada 3500/15-01-00-00 Power Supply Module is a low-voltage AC input power supply designed for installation in the 3500 System Rack. The 3500 rack can contain one or two power supplies with any combination of AC and DC. Either supply can power a full rack.
Function and Role in the 3500 System
Every 3500 rack requires at least one power supply module to convert facility AC power into the regulated voltages needed by the monitor modules, relay cards, and communication gateways installed in adjacent slots. The 3500/15 performs this function, occupying one of the two leftmost positions in the rack that are reserved exclusively for power supplies and the Rack Interface Module.
Without a functioning power supply, the entire monitoring system goes offline. This makes the 3500/15 a critical single point of failure in non-redundant configurations—a consideration that drives many facilities to specify dual power supplies for their most critical machine trains.
Ordering Code Breakdown
The full ordering structure for the 3500/15 follows the pattern 3500/15-AXX-BXX-CXX. For the 3500/15-01-00-00 model, the segments decode as follows:
- A = 01: Low-voltage AC power supply for the upper slot position
- B = 00: No power supply installed in the lower slot position
- C = 00: No hazardous area approval option selected
This is the simplest possible 3500/15 configuration: a single low-voltage AC power supply with no redundancy and no specialized certifications.
Input Specifications
The low-voltage AC input option is designed for facilities where the available supply voltage falls within the lower AC range. Specific input voltage and frequency ratings should be verified against the full 3500/15 datasheet (document 141495 or equivalent), as these parameters determine compatibility with the local power distribution system.
The 3500/15 includes power supply status monitoring, which reports the health of the module to the Rack Interface Module and, by extension, to the 3500/01 Configuration Software and any connected communication gateways. This allows operators to detect a failing power supply before it causes an unplanned system shutdown.
Redundancy and the Lower Slot
The most significant limitation of the 3500/15-01-00-00 is the absence of a second power supply. In this configuration, a single module failure results in loss of power to the entire rack, which means all machinery protection functions cease until the module is replaced.
For applications where continuous protection is mandatory—such as API 670 compliant installations on critical turbomachinery—a redundant configuration is strongly recommended. This would be achieved by specifying a power supply in the lower slot as well, for example **3500/15-01-01-00**, which provides two low-voltage AC modules operating in parallel.
The 3500 rack supports hot-swapping of power supply modules, allowing replacement of a failed module without powering down the entire system. However, in a non-redundant configuration like the 3500/15-01-00-00, hot-swapping is not possible because removing the sole power supply de-energizes the rack.
Approval Considerations
The “00” approval code indicates that this module carries no specific hazardous area certification. It is suitable for installation in general-purpose, non-classified areas such as standard control rooms and electrical rooms.
For installations in Class I, Division 2 or Zone 2 hazardous locations, a different approval option would be required. The 3500/15 is available with CSA/NRTL/C approval (option 01) and ATEX/IECEx/CSA approval (option 02) for these environments. The 3500/15-01-00-00 is not intended for use in classified areas.
Compatibility and Rack Integration
The 3500/15-01-00-00 is compatible with all 3500 series monitor modules, including the 3500/40M Proximitor Monitor, 3500/42M, 3500/44M, 3500/46M Hydro Monitor, 3500/50M Tachometer Module, and 3500/92 Communication Gateway. It installs in the leftmost slots of either the full-size 14-slot rack or the 7-slot Mini-Rack.
The module communicates with the Rack Interface Module to report status and any fault conditions. This integration allows the 3500/01 Configuration Software to display power supply health alongside other system diagnostics.
Environmental and Physical Characteristics
The 3500/15 operates within the standard 3500 system temperature range of -20°C to +65°C. Physical dimensions are consistent with other 3500 monitor modules: 241.3 mm high × 24.4 mm wide × 241.8 mm deep, with a weight of approximately 0.91 kg.
Power consumption for the 3500/15 is typically in the range of 7.7 watts, though actual consumption depends on the load presented by the modules installed in the rack.
Conclusion
The Bently Nevada 3500/15-01-00-00 Power Supply Module provides a single low-voltage AC power source for 3500 System Racks in general-purpose installations. Its simplicity makes it cost-effective for non-critical monitoring applications, but the lack of redundancy means that power supply failure will interrupt all protection functions. For critical machinery where continuous operation is essential, a redundant configuration using both upper and lower slots is the appropriate specification.
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