3500/33 149986-01D BENTLY NEVADA

3500/33 149986-01D Bently Nevada Digital Input Module

Brand：BENTLY NEVADA Model number：3500/33 149986-01D

Country of origin: U.S. Product weight：0.55kg

HS code：8517623990

Product Details：

Product Dimensions：

The Bently Nevada Digital Input Module (often categorized as a Discrete Input I/O Module) is engineered to provide the 3500 or Orbit 60 system with information regarding the machine's operating status and external commands. In the 3500 series, these inputs are typically found on specialized I/O modules attached to the backplane of monitors or communication gateways.

The module identifies "wet" contacts (which require external voltage) and "dry" contacts (which are powered by the module's internal wetting voltage). Its primary role is to trigger specific system behaviors, such as Trip Multiply, Alarm Inhibit, or Remote Reset, ensuring that the machinery protection logic is synchronized with the actual operational phase of the turbine or compressor.

Product Parameters

Channel Density: Typically available in 6-channel or 8-channel configurations depending on the specific module model.
Input Types: Supports both Dry Contacts (internally wetted) and Wet Contacts (externally wetted).
Internal Wetting Voltage: Generally provides approximately $12 \text{ VDC}$ to $24 \text{ VDC}$ for dry contact sensing.
Input Thresholds: Configurable voltage levels for logic "High" and "Low" states to prevent false triggering from electrical noise.
Update Rate: High-speed event detection, often reaching $1 \text{ millisecond}$ resolution for sequence-of-events recording.
Isolation: Features robust electrical isolation (up to $500 \text{ VDC}$ or higher) between field wiring and the system backplane to protect sensitive electronics.
Operating Temperature: Rated for industrial environments from $-30^{\circ}\text{C}$ to $+70^{\circ}\text{C}$ ( $-22^{\circ}\text{F}$ to $158^{\circ}\text{F}$ ).
Humidity: Operates in up to $95\%$ non-condensing humidity.

Product Advantages

API 670 Compliance: Specifically designed to meet the rigorous standards of the American Petroleum Institute for machinery protection, ensuring maximum safety for critical assets.
Anti-Mis-Tripping Logic: Incorporates sophisticated filtering and debounce logic to ensure that transient noise does not cause an accidental machine shutdown.
Seamless Integration: Works natively with Bently Nevada’s System 1 software, allowing for comprehensive diagnostic logging and condition monitoring.
Fault Tolerance: Designed with high reliability to ensure that the "Trip" command is always available when needed, even in the event of partial system component failure.
Diagnostic LEDs: Provides immediate visual feedback on the front or rear panel regarding the status of each discrete input channel.

Important Considerations

Intrinsically Safe Earthing: When using barrier-protected I/O modules in hazardous areas, a dedicated Earthing Module (like the 3500/04) must be installed to maintain safety certifications.
Power Sequencing: Ensure that external wetting voltages do not exceed the module's rated limits to prevent permanent hardware damage.
Configuration Matching: The software configuration in the 3500 Rack Configuration software must exactly match the hardware jumper settings on the I/O module (e.g., setting a channel for Trip Multiply vs. Alarm Inhibit).
Heat Dissipation: For installations where ambient temperatures exceed $50^{\circ}\text{C}$ , forced air convection (fans) is often required within the cabinet to prevent module overheating.
Wiring Integrity: Use shielded twisted-pair cables for all discrete inputs to minimize the risk of electromagnetic interference (EMI) triggering false status changes.

Product Applications

Trip Multiply: Used during machine start-up to temporarily increase alarm setpoints, preventing "nuisance trips" caused by high vibration during the machine's resonance or critical speed phases.
Remote Reset: Allows operators to reset latched alarms or OK limits from a remote control room without physically accessing the rack.
Machine State Identification: Detects whether a machine is at "Rest," "Slow Roll," or "Running" by monitoring auxiliary contacts from the motor starter or turbine controller.
Alarm Suppression/Inhibit: Disables specific monitoring functions during maintenance or known transient conditions to prevent unnecessary emergency shutdown (ESD) actions.
Sequence of Events (SOE): Provides precise timestamps for when a safety contact was opened or closed, which is vital for post-failure root cause analysis (RCA).

3500/53-03-0 Bently Nevada

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