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The 3500/33 is a cornerstone component of the 3500 Machinery Protection System, known as the 16-Channel Relay Module. Its primary function is to act as the "logic executor" for the system, performing interlocking protection actions via physical relay outputs based on alarm statuses defined in other monitor modules (such as vibration, displacement, or temperature) within the rack. It supports highly flexible logic configurations (e.g., AND/OR logic, Voting Logic) to rapidly trigger trip signals when critical machinery faults occur, thereby protecting vital industrial assets.
Full-Height Module
Independently Programmable Outputs
Can Use Alarming Inputs
The 16-Channel Relay Module is a full-height module that provides 16 relay outputs. Any number of 16-Channel Relay Modules can be placed in any of the slots to the right of the Rack Interface Module. Each output of the 16 Channel Relay Module can be independently programmed to perform needed voting logic. Each relay utilized on the 16-Channel Relay Module includes "Alarm Drive Logic". The Alarm Drive Logic is programmed using AND and OR logic, and can utilize alarming inputs (alerts and dangers), Not-OK, or individual PPLs from any monitor channel or any combination of monitor channels in the rack. This Alarm Drive Logic is programmed using the 3500 Rack Configuration Software to meet the specific needs of the application.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Bently Nevada 3500/33 Relay Module, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Oil & Gas
Used for centrifugal compressor trains on offshore platforms or onshore plants. Relays trigger emergency shutdowns (ESD) when severe vibration is detected.
Power Generation
Monitoring axial displacement in gas or steam turbines. Relays act as the last line of defense, forcing a fuel shut-off before a rotor-stator collision occurs.
Petrochemical
Managing shutdown logic for large extruders. Utilizes 16-channel flexibility to execute combined fault logic for vibration, displacement, and temperature.
Steel & Metallurgy
Controlling blast furnace blowers. Relays promptly execute protection via the control system when cooling fails or mechanical vibration exceeds limits.
Chemical Industry
Driving interlocks for reciprocating compressors. Uses "Voting Logic" (e.g., 2-out-of-2) to reduce the risk of unplanned shutdowns caused by single-sensor false alarms.
Mining & Minerals
Protecting large ball mills or SAG mills. Relays convert vibration status into dry contact signals to directly trip high-power motor circuit breakers.
Strictly follow the contact ratings (e.g., 5A @ 24Vdc/120Vac). Never drive high-power motors or heavy solenoids directly. Use interposing relays to prevent contact welding or burnout from arcing.Ensure the relay is set to either Normally Energized (NE) or Normally De-energized (NDE). For critical protection, NE is typically recommended so the system fails safe (trips) upon loss of power.While the 3500/33 supports hot swapping, you must bypass or switch the associated interlock loops to manual before removal. Pulling the module directly may cause a transient trip and an unplanned shutdown.
It is a 16-Channel Relay Module, an output component of the 3500 Machinery Protection System used for alarm and shutdown control.
How to use the 3500/33?
Insert it into a 3500 rack slot and configure the logic via software. When other monitor modules detect danger, it trips the relay contacts to trigger a shutdown.
What machinery does 3500/33 protect?
It primarily protects critical rotating machinery such as steam turbines, compressors, pumps, generators, and motors.
What are the contact ratings for 3500/33?
Standard contacts typically support up to 5A @ 24Vdc/120Vac. Do not drive high-power loads directly.
What are the contact ratings for 3500/33?
Standard contacts typically support up to 5A @ 24Vdc/120Vac. Do not drive high-power loads directly.
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