Description
Bently Nevada 3500/50-01-01-00
Technical Specifications:
- Module Type: Full-height, 2-channel tachometer module
- Input Signal Range: +10.0V to -24.0V
- Input Impedance: 20 kΩ (standard), 40 kΩ (TMR), 7.15 kΩ (internal barrier)
- Power Consumption: 5.8 watts typical
- Sensor Power Supply: -24V DC, maximum 40 mA per channel
- Resolution: 0.3662 µA per bit at room temperature
- Accuracy (RPM): Less than 100 rpm: ±0.1 rpm; 100 to 10,000 rpm: ±1 rpm; 10,000 to 99,999 rpm: ±0.01% of actual shaft speed
- RPM/Min Accuracy: ±20 rpm/min
- Refresh Rate: Approximately 100 ms
- Output Impedance (Buffered): 550 Ω
- Operating Temperature: -30°C to +65°C (-22°F to +150°F)
- Storage Temperature: -40°C to +85°C (-40°F to +185°F)
- Humidity: 95% non-condensing
- Agency Approval: CSA/NRTL/C certified
Functional Features:
- 2-channel tachometer module accepting proximity probe or magnetic pickup inputs
- Configurable for four different measurement types: speed monitoring with setpoint alarm and speed band alarm; speed monitoring with setpoint alarm and zero speed indication; speed monitoring with setpoint alarm and rotor acceleration alarm; speed monitoring with setpoint alarm and reverse rotation indication
- Can be configured to provide Keyphasor signal to the 3500 rack backplane for use by other monitors, eliminating the need for a separate Keyphasor module
- Peak hold function: stores the highest speed, highest reverse speed, or number of reversals the machine has reached
- Peak values are user-resettable
- Automatic threshold voltage for inputs greater than 0.0167 Hz (1 rpm for 1 event/rev), minimum trigger amplitude of 1V peak-to-peak
- Manual threshold voltage selectable between +9.5V DC and -23.5V DC, minimum trigger amplitude of 0.5V peak-to-peak
- Hysteresis voltage selectable between 0.2V and 2.5V
- Recorder output: +4 to +20 mA proportional to module full-scale value (rpm or rpm/min)
- Front panel LEDs: OK, TX/RX, and Bypass indicators
- Buffered sensor output with short circuit and ESD protection via coaxial connector on front panel
Application Scenarios:
- Shaft speed monitoring for turbines, compressors, pumps, fans, and motors
- Zero speed detection for turning gear engagement
- Reverse rotation detection
- Rotor acceleration monitoring during startup
- Speed band monitoring for critical speed avoidance
- Keyphasor signal generation for phase-referenced vibration analysis
- Power generation, petrochemical, metallurgical, and cement industries
Performance Parameters:
- Channel count: 2 channels per module
- Speed input range: 0.0039 to 255 events/rev, maximum full-scale 99,999 rpm
- Maximum input frequency: 20 kHz
- Minimum input frequency (eddy current): 0.0167 Hz (1 rpm for 1 event/rev)
- Minimum input frequency (passive magnetic pickup): 3.3 Hz
- Temperature error: ±0.25% at room temperature, ±0.7% over full temperature range
Material Composition:
- High-reliability electronic components on multi-layer PCB
- Metal module enclosure with conformal coating
- Gold-plated backplane edge connectors
- Coaxial connectors with short circuit and ESD protection
Structural Features:
- Full-height module form factor
- Front panel with OK, TX/RX, and Bypass LED indicators
- Front panel coaxial connectors for buffered sensor outputs
- Rear I/O module (133442-01) with internal terminal connections
- Plug-in design compatible with any accessible rack slot
