3300/50

Description

The 3300/50 Tachometer measures shaft speed, acceleration, or zero-speed indication, providing proportional voltage or current output and Alert status via relay contacts for external annunciators.

Inputs

• Transducers: Bently Nevada 3300, 7200, or 3000 series proximity probes; Magnetic pickups (not recommended for zero-speed monitoring)
• Signal: Accepts two transducer signals, can operate with any combination of inputs
• Input Impedance: 10 kΩ
• Power Consumption: Nominally 2.5 watts

Outputs

• Recorder: User-programmable for +4 to +20 mA, 0 to -10 Vdc, or +1 to +5 Vdc
• Recorder Accuracy (at +25°C / 77°F):
  • +4 to +20 mA: ±1.8% of signal, ±0.09 mA offset
  • +1 to +5 Vdc: ±2.2% of signal, ±10 mV offset
  • 0 to -10 Vdc: ±2.1% of signal, ±15 mV offset
• Output Impedance (Voltage Outputs): 100 Ω, minimum load resistance 10 kΩ
• Voltage Compliance (Current Outputs): 0 to +12 Vdc range across load, load resistance 0 to 600 Ω with +4 to +20 mA option
• Buffered Transducer Outputs: One coaxial connector per transducer, short-circuit protected
• Transducer Supply Voltage: User-programmable for -24 Vdc or -18 Vdc, current limited on individual monitor circuit board

Physical Dimensions

• Space Requirements: 1 rack position (any position except 1 and 2, reserved for Power Supply and System Monitor)
• Weight: 1 kg (2.2 lbs.)

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