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330878-90-00

Bently Nevada 330878-90-00
Tachometer Signal Conditioner

Core Features:
• 1-30,000 RPM Range
• Multi-Output: 0-10V + TTL + Modbus RTU
• API 670 Annex K Compliant

Key Specs:
✓ ±0.01% Accuracy
✓ 10ms Response Time
✓ SIL 2 Capable

Applications:

Turbine Overspeed Protection

Critical Gearbox Monitoring

VFD System Integration

*Note: Requires 3300XL probes. Configurable via 3300/20M software.*

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Bently Nevada 330878-90-00
Tachometer Signal Conditioner Module

Key Specifications:
• Input Type: Magnetic pickup (MPU) or Proximity Probe
• Input Range: 1-30V RMS (MPU), 5-28VDC (Probe)
• Output Signals:

Isolated 0-10VDC (Analog)

TTL/CMOS (Digital)

RS-485 Modbus RTU

Technical Parameters:
✓ Speed Range: 1-30,000 RPM
✓ Accuracy: ±0.01% of reading
✓ Resolution: 0.1 RPM
✓ Update Rate: 10ms

Signal Processing:

Programmable thresholds (4x)

Zero-speed detection (configurable delay)

Phase-locked loop filtering

Electrical Characteristics:

Power Supply: 18-30VDC

Isolation: 1500V AC

Load Capacity: 500Ω (Analog)

Environmental Ratings:

Operating Temp: -40°C to +85°C

Protection: IP40 (DIN-rail enclosure)

EMC: EN 61000-6-4

Certifications:
• API 670 5th Ed. (Annex K)
• SIL 2 Capable
• DNV Type Approved

Typical Applications:

Turbine Overspeed Protection

Gearbox Monitoring

Variable Frequency Drive Systems