Product Description

Overview

The Bently Nevada 177990‑01 Keyphasor Module is an essential component of the 3500 Series machinery protection system. Moreover, it provides once-per-turn phase reference signals from proximity probes or magnetic pickups, enabling precise shaft speed and vibration analysis. Designed for industrial environments, it ensures reliable signal conditioning and transmission to the 3500 rack for advanced diagnostics and predictive maintenance.

Technical Specifications

• Model Number: 177990‑01

• Series: Bently Nevada 3500/25 Enhanced Keyphasor Module

• Type: Keyphasor Signal Conditioning Module

• System Compatibility: Bently Nevada 3500 Machinery Protection System

• Functions: Provides once-per-turn phase reference signals for vibration and speed analysis

• Inputs: Proximity probes or magnetic pickups

• Number of Channels: 2 independent Keyphasor signals

• Output Signal: TTL-compatible conditioned pulse

• Accuracy (Direct PK or RMS): ±0.5% typical, 1.1% worst case

• Bias Voltage: +0.4 V / -0.8 V typical, +0.8 V / -1.34 V worst case

• Tracking Filters: nX tracking filters, bandwidth 0.075X (X = speed of associated channel)

• Alarming Setpoints: User configurable over/under

• Time Delay: 100 mS – 60 minutes

• Latching: User configurable alarming or relay latching

• Power Supply: Provided via 3500 rack backplane

• Operating Environment: Industrial rotating machinery monitoring

• Environmental: Indoor use only, –30°C to +65°C operating, –40°C to +85°C storage, 0–95% RH non-condensing

• Vibration: 5 g @ 57–500 Hz

• Shock: 15 g, 11 ms

• Altitude: <2000 m (6,562 ft)

• Pollution Degree: 2

• Dimensions: 26.7 × 20 × 18.2 cm (10.5 × 7.87 × 7.15 in)

• Weight: 4.5 kg (9.9 lbs)

• Mounting: Bulkhead with 4 bolts/screws at corners

FAQ

Q1: What is a Keyphasor signal used for?
A1: It provides a once-per-turn pulse used as a phase reference for vibration and speed analysis.

Q2: How many Keyphasor channels does this module support?
A2: It supports up to two independent Keyphasor signals simultaneously.

Q3: Can this module operate in harsh industrial conditions?
A3: Yes, it is designed for continuous operation under vibration, shock, and temperature extremes.

Q4: What type of inputs does the module accept?
A4: The module accepts proximity probes or magnetic pickup signals.

Q5: Is it compatible with the Bently Nevada 3500 system?
A5: Yes, it integrates seamlessly with 3500 Series machinery protection racks.