3500/25-01-0302 Bently Nevada Enhanced Keyphasor Module

3500/25-01-0302 Bently  Introduction and Technical Parameters
Introduction
The 3500/25-01-0302 is an Enhanced Keyphasor Module from Bently Nevada (a Baker Hughes business), a half-height, two‑channel module of the 3500 Machinery Protection and Condition Monitoring Systemdam.bakerhughes.com. It provides Keyphasor signals to monitor modules in a 3500 rack, receiving inputs from proximity probes or magnetic pickups to enable monitoring of shaft rotational speed and vector parameters like 1X vibration amplitude and phasedam.bakerhughes.com. It features expanded signal processing, field‑upgradeable firmware, and asset management data reporting, while remaining fully downward‑compatible with legacy Keyphasor modulesdam.bakerhughes.com. It is widely used in rotating machinery monitoring for industries such as power generation, oil and gas, petrochemical, and manufacturing.

Technical Parameters
Basic Information
Brand: Bently Nevada (Baker Hughes)
Product Type: Enhanced Keyphasor Module
Part Number: 3500/25-01-0302
Series: 3500 System
Ordering Code Details: 01 (single half‑height 2‑channel card), 03 (Internal Barrier I/O with Internal Terminations), 02 (specific agency approval option)
Main Module PWA: 149369‑01; I/O Module PWA: 135473‑01
Electrical Specifications
Power Consumption: 3.2 W (typical)
Input Impedance: Minimum 21.8 kΩ
Output Impedance: Maximum 504 Ω (buffered output)
Input Signal: Proximity probe or magnetic pickup signalsdam.bakerhughes.com
Physical Specifications
Main Module Dimensions (H x W x D): 119.9 mm × 24.4 mm × 256.5 mm (4.72 in × 0.96 in × 10.10 in)dam.bakerhughes.com
I/O Module Dimensions (H x W x D): 241.3 mm × 24.4 mm × 103.1 mm (9.50 in × 0.96 in × 4.06 in)dam.bakerhughes.com
Main Module Weight: 0.34 kg (0.76 lbs)dam.bakerhughes.com
I/O Module Weight: 0.46 kg (1.01 lbs)dam.bakerhughes.com
Rack Space: 1 half‑height front slotdam.bakerhughes.com

Environmental Specifications
Operating Temperature: 0–65°C (32–149°F) with Internal Barrier I/O; -30–65°C (-22–149°F) with other I/O modules
Storage Temperature: -40–85°C (-40–185°F)
Humidity: 95% (non‑condensing)
Performance and Compatibility
Channels: 2‑channel (per half‑height card)
Compatibility: Fully downward‑compatible with legacy 3500/25 modules; configurable via 3500 Rack Configuration Softwaredam.bakerhughes.com
Signal Processing: Generates once‑per‑turn event signals from multi‑event inputs; supports up to 4 Keyphasor signals (normal config) or 8 (paired config)