Product Description

The 3500/25 (125800-01) is a high-performance Keyphasor I/O module designed to provide critical timing and phase reference signals for the Bently Nevada 3500 Machinery Protection System. This half-height module receives input from proximity probes or magnetic pickups and converts them into digital timing pulses used by other monitors in the rack for phase-accurate vibration analysis and speed measurements.

The 125800-01 is engineered to support both standard and Triple Modular Redundant (TMR) rack configurations, ensuring high availability for mission-critical assets. It features dual-channel input capability and internal terminations, simplifying the wiring process while maintaining signal integrity. This module is essential for applications requiring synchronous data acquisition, such as tracking vibration vectors during turbine start-ups and steady-state monitoring of high-speed rotating equipment.

Technical Specifications

• Module Type: Keyphasor Input/Output Module (Half-height)

• Part Number: 125800-01

• Series: Bently Nevada 3500

• Channel Capacity: Dual-channel input

• System Support: Standard and TMR (Triple Modular Redundant)

• Phase Accuracy: ±0.5°

• Frequency Response: 0 to 10 kHz

• Input Voltage: 12–32 VDC

• Input Current: 10 mA (Maximum)

• Output Range: 0–10 VDC (buffered signal)

• Output Current: 20 mA (Maximum)

• Operating Temperature: 0 °C to +65 °C (32 °F to +149 °F)

• Humidity: 95% non-condensing

• Dimensions: 24.2 x 11.2 x 2.5 cm

• Weight: 0.38 kg (0.84 lbs)