133396-01 | Bently Nevada | Overspeed Detection I/O Module

Description

The Bently Nevada 133396-01 Overspeed Detection I/O Module is an integral part of the 3500/53 Overspeed Protection System. It provides reliable, fast-response overspeed protection by monitoring and conditioning input signals from proximity probes or magnetic pickups. The module ensures precise speed measurement and alarm functionality to safeguard machinery.

Specifications

Inputs

• Signal:
  • Accepts single transducer input from proximity probes or magnetic pickups.
  • Signal Range: +10.0 V to -24.0 V (internally limited).
  • Input Impedance: 20 kΩ.
• Supported Transducers:
  • Bently Nevada 3300 series (5 mm, 8 mm, 11 mm, 14 mm).
  • 3300 XL 16 mm HTPS and RAM Proximitor transducers.
  • Magnetic pickups.
• Power Consumption: 8.0 watts (typical).

Outputs

• Front Panel LEDs:
  • OK LED: Indicates proper operation.
  • TX/RX LED: Indicates communication with other modules.
  • Bypass LED: Indicates bypass mode is active.
  • Test Mode LED: Shows the module is in test mode.
  • Alarm LEDs: Indicates an alarm condition for the associated relay.
• Buffered Outputs:
  • Coaxial connectors with short circuit and ESD protection.
  • Output Impedance: 550 Ω.
• Transducer Power Supply: -24 Vdc, 40 mA max.
• Recorder Outputs:
  • +4 to +20 mA proportional to full-scale RPM range.
  • Voltage Compliance: 0 to +12 Vdc across a 0–600 Ω load.
  • Resolution: 0.3662 µA per bit (±0.25% error at room temperature).

Relays

• Type: Single-pole, double-throw (SPDT).
• Contact Ratings:
  • Maximum Switched Power:
    • DC: 120 W.
    • AC: 600 VA.
  • Maximum Switched Voltage:
    • DC: 30 Vdc.
    • AC: 250 Vac.
  • Maximum Switched Current: 5 A.
  • Minimum Switched Current: 100 mA @ 5 Vdc.
• Contact Life: 100,000 cycles @ 5 A, 24 Vdc or 120 Vac.
• Arc Suppressors: 250 Vrms (installed as standard).

Signal Conditioning

• Frequency Response:
  • Supports 1 to 255 events per revolution.
  • Max Full-Scale RPM: 99,999 RPM.
  • Max Input Frequency: 20 kHz.
  • Min Input Frequency:
    • Proximity transducers: 0.0167 Hz (1 RPM for 1 event/revolution).
    • Magnetic pickups: 3.3 Hz.
• RPM Accuracy:
  • < 100 RPM: ±0.1 RPM.
  • 100 to 10,000 RPM: ±1 RPM.
  • 10,000 to 99,999 RPM: ±0.01%.

Alarms

• Alarm Setpoints: Configurable for under and over-speed alerts, as well as danger (overspeed) conditions.
• Alarm Time Delay: Less than 30 ms above 300 Hz.

Environmental Limits

• Operating Temperature: -30 °C to +65 °C (-22 °F to +149 °F).
• Storage Temperature: -40 °C to +85 °C (-40 °F to +185 °F).
• Humidity: 95%, non-condensing.

Physical Dimensions

• Module Size (H x W x D): 241.3 mm x 24.4 mm x 99.1 mm (9.50 in x 0.96 in x 3.90 in).
• Weight: 0.45 kg (1.0 lb).
• Rack Space Requirements: Occupies one full-height rear slot per channel.

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