The Bently Nevada 3500/50-01-00-01, also cataloged as the 3500/50 Tachometer Module, operates as a two-channel hardware component for speed measurement, zero speed detection, and overspeed protection within the 3500 Series machinery protection system. This module receives input signals from proximity transducers or magnetic pickups, processes rotational speed parameters, and provides programmable relay outputs to trip rotating machinery when speed thresholds are exceeded.

Model Configuration

The complete ordering code 3500/50-01-00-01 incorporates specific modular options defined by Bently Nevada manufacturer documentation:

• Base Model (3500/50): Designates the Tachometer Module hardware platform.

• I/O Module Option (-01): Indicates the I/O module configuration (such as Discrete I/O / Internal Barrier options) associated with the front card.

• Agency Approval Option (-00): Designates standard non-hazardous area agency approval listings.

• Communication or Firmware Suffix (-01): Specifies the standard revision level or feature set configuration for the module.

Hardware Specifications

Signal Processing and Overspeed Trip Logic

The Bently Nevada 3500/50 tachometer module processes incoming periodic signals to determine shaft rotational speed, acceleration rate, and reverse rotation status. It compares measured speed against user-programmable alarm and danger setpoints. When configured for overspeed protection, the module delivers reliable relay actuation to initiate emergency shutdown sequences, protecting turbines, compressors, and pumps from destructive overspeed events.

Ordering Information and Package Contents

• 1 x Bently Nevada 3500/50-01-00-01 Tachometer Module Front Card

• 1 x Associated 3500 Series Tachometer Rear I/O Module

Installation and Electrical Integration

• Ensure the 3500 instrument rack is completely powered down before inserting or extracting the tachometer module and its rear I/O card to prevent bus disruption.

• Connect transducer signal wiring to the designated terminals on the rear I/O module, ensuring proper shielding and grounding to prevent electromagnetic interference.

• Verify that signal cable shields are terminated correctly at the rack grounding bar to maintain signal integrity for high-frequency pulse inputs.

• Configure module setpoints and trip logic using the 3500 configuration software via the Rack Interface Module (RIM) or Transient Data Interface (TDI).

• Maintain appropriate environmental clearance around the 3500 rack assembly to comply with operating temperature limits.

Frequently Asked Questions

• Q: What is the primary function of the 3500/50-01-00-01 module? A: It functions as a dual-channel tachometer module designed to measure shaft rotational speed and provide overspeed trip protection.

• Q: Which monitoring platform is this module built for? A: It is engineered specifically for the Bently Nevada 3500 Series machinery protection system.

• Q: How many input channels does this tachometer module support? A: It supports two independent transducer input channels per module.

• Q: What are the physical dimensions and weight of the main front module?A: The front module measures 241.3 mm x 24.4 mm x 241.8 mm (9.50 in x 0.96 in x 9.52 in) and weighs 0.82 kg (1.8 lbs).

• Q: How much rack space does the 3500/50 module require? A: It occupies 1 full-height slot in both the front and rear of a standard 3500 chassis.

• Q: What types of speed sensors can be connected to the inputs? A: It accepts input signals from eddy current proximity probe transducer systems or magnetic pickup sensors.

• Q: What is the operating temperature range for this module?A: The module is rated for operation from -30 deg C to +65 deg C (-22 deg F to +149 deg F).

• Q: Can this module be hot-swapped in an active 3500 rack? A: Power-down procedures must be followed in accordance with system safety guidelines prior to module insertion or removal.

Related Models and Compatibility

• Bently Nevada 3500 Instrument Rack

• Bently Nevada 3500/20 Rack Interface Module (RIM)

• Bently Nevada 3500/22M Transient Data Interface (TDI)

• Bently Nevada Proximity Transducer Systems and Magnetic Pickups