Bently Nevada 3500/50-01-00 133442-01 I/O Module with Internal Termination

Bently Nevada 3500/50-01-00 (Part Number: 133442-01): Description

The Bently Nevada™ 3500/50-01-00 (part number 133442-01) is a two-channel Tachometer Module with an Internal Termination I/O Module, designed for the 3500 Machinery Protection System. It specializes in receiving input signals from proximity probes or magnetic pickups (with specific restrictions) to measure critical rotational parameters—including shaft rotative speed, rotor acceleration, and rotor direction—while enabling user-programmable alarm setpoints for machinery monitoring and protection.

Configured with the model suffix "01-00", this module features an I/O Module with Internal Terminations (designated by "01") and no agency approval (designated by "00"). It offers four programmable configuration options: speed monitoring with setpoint and speed band alarming; speed monitoring with setpoint alarming and zero speed notification; speed monitoring with setpoint and rotor acceleration alarming; and speed monitoring with setpoint alarming and reverse rotation notification. Notably, it can supply conditioned Keyphasor® signals to the 3500 rack backplane, eliminating the need for a separate Keyphasor module in the system.

The module includes a peak hold feature that stores the highest speed, highest reverse speed, or number of reverse rotations (depending on the selected channel type), which can be reset by the user. It features front-panel status LEDs for operational feedback and provides 4–20 mA recorder outputs proportional to the full-scale range, suitable for data logging, chart recording, or display purposes. Important application notes highlight that it is not designed for speed control or overspeed protection systems, and magnetic pickups have restrictions for reverse rotation and zero speed options due to signal limitations at low speeds.

Engineered for seamless integration with the 3500 Series rack architecture, it adheres to rugged industrial standards, ensuring reliable performance in harsh environments typical of power generation, oil & gas, and manufacturing industries. It requires specific firmware and software versions for full functionality, supporting modular system expansion and retrofitting without modifying existing infrastructure.

Key Parameters

Model & Part Number: 3500/50-01-00, 133442-01

I/O Module Type: I/O Module with Internal Terminations; no external termination blocks required

Agency Approval: None (designated by "00")

Channel Configuration: 2 channels, supporting 1–2 transducer signals

Core Functions: Shaft rotative speed measurement, rotor acceleration detection, rotor direction monitoring; configurable alarm setpoints for selected parameters

Supported Transducers: Proximity probes (primary); magnetic pickups (with restrictions for reverse rotation and zero speed options)

Input Specifications:

Input signal range: +10.0 V to -24.0 V.

Input impedance: 20 kΩ (standard), 40 kΩ (TMR), 7.15 kΩ (Internal Barrier).

Power consumption: Typical 5.8 Watts.

Minimum input frequency: 0.0167 Hz (1 rpm for 1 event/revolution) for proximity transducers; 3.3 Hz for passive magnetic pickups.

Maximum input frequency: 20 kHz.

Events per revolution: 0.0039–255.

Maximum full-scale speed range: 99,999 rpm.

Signal Conditioning:

Auto Threshold: For inputs above 0.0167 Hz; minimum triggering amplitude 2 V peak-to-peak.

Manual Threshold: User-selectable from +9.5 Vdc to -23.5 Vdc; minimum triggering amplitude 500 mV peak-to-peak.

Hysteresis: User-selectable from 0.2 to 2.5 V.

Accuracy:

Speed accuracy: ±0.1 rpm (less than 100 rpm), ±1 rpm (100–10,000 rpm), ±0.01% of true shaft speed (10,000–99,999 rpm).

Rotor acceleration accuracy: ±20 rpm/min.

Output Specifications:

Recorder outputs: 4–20 mA (proportional to full-scale range), voltage compliance 0–12 Vdc, load resistance 0–600 Ω.

Resolution: 0.3662 µA per bit; ±0.25% error at room temperature, ±0.7% error over temperature range; update rate ~100 ms.

Alarm Functionality:

Alarm setpoints: Alarm 1 (for all measured values), Alarm 2 (for any two measured values); adjustable 0–100% of full-scale.

Alarm time delays: Alarm 1 (1–60 seconds, 1-second intervals); Alarm 2 (1–60 seconds, 0.1-second intervals).

Physical Dimensions:

Monitor module (main board): 241.3 mm × 24.4 mm × 241.8 mm (9.50 in × 0.96 in × 9.52 in), weight 0.82 kg (1.8 lbs).

I/O module (non-barrier): 241.3 mm × 24.4 mm × 99.1 mm (9.50 in × 0.96 in × 3.90 in), weight 0.20 kg (0.44 lbs).

Rack Space Requirements: 1 full-height front slot (monitor), 1 full-height rear slot (I/O module).

Environmental Limits:

Operating temperature: -30°C to +65°C (-22°F to +150°F) (non-internal barrier I/O); 0°C to +65°C (32°F to +150°F) (internal barrier I/O).

Humidity: Up to 95% (non-condensing).

Certifications & Compliance: CE marked; compliant with EMC Directive (EN 55011 Class A, EN 61000-4 series) and Low Voltage Directive (EN 61010-1); CSA/NRTL/C approval for Class I, Division 2, Groups A-D (when used with internal/external termination I/O modules).

Software & Firmware Requirements: Compatible with 3500/01 Configuration Software v2.00+ (v3.50+ for reverse rotation), 3500/02 Data Acquisition Software v2.00+ (v2.40+ for reverse rotation), 3500/03 Display Software v1.10+ (v1.40+ for reverse rotation); 3500/50 firmware Revision J (1.09)+ for reverse rotation.

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