Bently Nevada 125800‑01 Keyphasor I/O Module

Technical Specifications

Model: 125800‑01

Brand: Bently Nevada

Product Type: Dual‑channel keyphasor I/O sub‑module,internal terminal version

Matching Main Module: 3500/25 enhanced keyphasor front‑panel module

Input Channel: 2 independent keyphasor input channels

Supported Sensor: proximity probe,magnetic pickup

Function: convert analog keyphasor pulse signal into digital reference signal for shaft speed,1X amplitude and phase measurement

Power Consumption: 4.2 W,supplied by 3500/25 main board

Remark: Cannot work independently; internal wiring terminals; compare with external terminal version 126648‑01

Module Form: Half‑height plug‑in rear daughter board

Weight: 0.38 kg

Dimension: 242 mm×112 mm×25 mm

Protection Grade: IP20

Certification: UL,CSA,CE

Working Temperature: ‑30℃ ~ +65℃,non‑condensing

Storage Temperature: ‑40℃ ~ +85℃

Humidity: 5%‑95% non‑condensing

Application: Turbine,compressor rotating machinery monitoring,provide keyphasor phase reference for vibration vector analysis,system maintenance and spare‑part replacement.

Product Details

125800‑01 is internal‑termination dual‑channel keyphasor I/O sub‑board for Bently Nevada 3500/25 enhanced keyphasor module. It must be installed on rear side of 3500/25 front module and cannot operate alone.

It receives pulse signals from proximity probes or magnetic pickups,converts analog pulse into digital keyphasor reference signal. It delivers phase timing source for shaft speed calculation,1X vibration amplitude and phase angle measurement for monitor modules and System 1 software.

One 3500/25 front card can mount two pieces of 125800‑01,to achieve max 4 keyphasor input channels. 126648‑01 is the external‑terminal variant for field wiring requirement. It supports TMR triple‑modular‑redundant system configuration and backward compatible with legacy 3500 keyphasor system.

Note: This is legacy 3500 series spare component,widely used for replacement of turbine and compressor TSI monitoring & protection systems.