3500/25 125800-01 | Bently Nevada Keyphasor Input/Output Module

Overview

The Bently Nevada 3500/25 125800-01 Keyphasor I/O Module is designed for precision shaft and rotational monitoring within the 3500 series system. It delivers accurate timing and phase measurements for machinery protection, supporting dual-channel input for enhanced flexibility. Its compact and lightweight form factor simplifies installation while maintaining robust operation in harsh industrial environments. The module is compatible with both Triple Modular Redundant (TMR) systems and legacy 3500 systems, ensuring seamless integration and backward compatibility.

Technical Specifications

• Model Number: 3500/25

• Part Number: 125800-01

• Module Type: Keyphasor I/O Module

• Dimensions: 24.2 × 11.2 × 2.5 cm

• Weight: 0.38 kg

• Operating Temperature: 0°C to +65°C

• Storage Temperature: -40°C to +85°C

• Humidity: Up to 95%, non-condensing

• Input Voltage: 12–32 VDC

• Maximum Input Current: 10 mA

• Output Voltage Range: 0–10 VDC

• Maximum Output Current: 20 mA

• Accuracy: ±0.5° for precise phase measurement

• Bandwidth: 0–10 kHz

• Features: Dual-channel input, internal terminations, user-friendly configuration, TMR support, compact design

Applications

• Rotational and shaft monitoring in turbines, compressors, and motors

• Triple Modular Redundant system implementations for critical machinery

• Replacement or upgrade for legacy 3500 systems

• Industrial facilities requiring precise phase and timing data

FAQ

Q1: What is the primary function of the 3500/25 module?
A1: It provides dual-channel Keyphasor input for accurate rotational and phase measurements.

Q2: Can it integrate with older 3500 systems?
A2: Yes, the module is backward compatible with legacy 3500 systems.

Q3: Is it suitable for harsh environments?
A3: Yes, it operates reliably across 0–65°C and high humidity conditions.

Q4: How precise is the module?
A4: It delivers ±0.5° accuracy with a bandwidth up to 10 kHz for detailed measurement.

Q5: Can it be used in TMR configurations?
A5: Yes, it is specifically designed to support Triple Modular Redundant systems.