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Technical specifications for 3500/25 125800-02
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Manufacturer:Bently Nevada
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Product Category:Machinery Monitoring Systems
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Spare Part Number:3500/25 125800-02
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Estimated shipping dimensions:2.5x11.2x24.2cm
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Weight:0.48 kg
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Tariff Code:8537101190
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Counliy of origin:USA
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Configuration:3500/25 processing path with 125800-02 rear I/O
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I/O Type:Isolated; internal terminations
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Intended Signal Source:Magnetic pickups
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Proximitor Input Use:Supported when an external power supply is provided
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Input Channels:Up to two transducer signals per Keyphasor module
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Isolated Input Range:+5 V to -11 V
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Input Impedance:21.8 kohm minimum
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Passive Magnetic Pickup Speed:Greater than 200 rpm (3.3 Hz)
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Buffered Outputs:Two front coaxial outputs and two rear Euro-style outputs
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Transducer Supply:-24 Vdc, 40 mA maximum per channel
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Main Module Rack Space:One half-height front slot
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I/O Module Rack Space:One full-height rear slot
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Operating Temperature:-30 to +65 deg C with this non-barrier I/O execution
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Storage Temperature:-40 to +85 deg C
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Humidity:95%, non-condensing
Information
Overview
Manuals
Common Applications
Product Precautions
Bently Nevada 3500/25 125800-02 provides a rack-level timing route in which the Enhanced Keyphasor processor receives field signals through an isolated internal-termination I/O module. The arrangement supports magnetic-pickup applications that require isolation from other connected systems.
- Processes as many as two transducer inputs in one Keyphasor channel position.
- Uses the 125800-02 isolated rear I/O module with internal field terminations.
- Provides buffered Keyphasor signals at both the front and rear of the rack.
- Supports passive magnetic pickups above the stated minimum rotational speed.
The processor converts shaft-reference events into digital timing signals that other 3500 monitor modules and diagnostic equipment use for rotational speed, phase and vector measurements. The selected rear I/O execution keeps field wiring inside the rack and must remain paired with the intended channel position.
Important Notice: Keep the complete 3500/25 125800-02 assembly identity separate from the standalone 125800-02 spare I/O module.
Bently Nevada 3500/25 125800-02 Manuals & Downloads
Bently Nevada 3500/25 125800-02 Official Technical Reference (PDF)Bently Nevada 3500/25 125800-02 Installation & Commissioning Guide (PDF)The official reference covers the 3500/25 Enhanced Keyphasor system and the 125800-02 isolated I/O selection. The installation guide organizes identity, wiring, commissioning and acceptance checks for this complete product entry.
Shaft-speed reference
Generate timing events for rotational-speed measurement from a suitable magnetic pickup.
Phase-reference distribution
Provide a Keyphasor reference used by monitor channels that calculate phase and vibration vectors.
Isolated control-system paths
Separate the magnetic-pickup input from other connected equipment through the isolated rear I/O execution.
Paired Keyphasor service
Support primary and secondary timing routes in a qualified paired or TMR rack arrangement.
Apply these checks to the complete Bently Nevada 3500/25 125800-02 assembly before restoring its timing references.
1
Confirm both the 3500/25 system identity and the 125800-02 rear I/O marking before installation.
2
Use internal field terminations; do not connect an external termination block to 125800-02.
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For a passive magnetic pickup, confirm that the operating speed remains above 200 rpm.
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Provide an external supply when a Proximitor source is connected through this isolated I/O execution.
5
Record input polarity, channel assignment and conductor positions before disconnecting field wiring.
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Inspect the half-height front slot, full-height rear slot and mating connectors for damage or contamination.
7
Restore trigger level, hysteresis and event-per-revolution settings for the intended shaft reference.
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Verify stable speed, phase and buffered-output behavior before returning dependent monitor channels to service.
Technical notes
Use 125800-02 only as the isolated internal-termination rear I/O selection for this 3500/25 path. Confirm whether each input is a magnetic pickup or an externally powered Proximitor source, then verify polarity, trigger level and timing response before enabling dependent monitors.
FAQ View All FAQ
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What does 125800-02 identify within 3500/25 125800-02?It identifies the isolated Keyphasor I/O module with internal terminations, intended primarily for magnetic-pickup inputs.
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How many inputs can 3500/25 125800-02 process?The associated Keyphasor module accepts up to two proximity-probe or magnetic-pickup signals.
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Can 3500/25 125800-02 accept a Proximitor signal?Yes, the isolated I/O execution can provide isolation for a Proximitor application when an external power supply is provided.
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Which input range applies to 3500/25 125800-02?The isolated I/O input range is +5 V to -11 V.
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What minimum speed applies to a passive magnetic pickup on 3500/25 125800-02?A passive magnetic pickup requires shaft speed above 200 rpm, equivalent to 3.3 Hz.
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Where are buffered outputs available on 3500/25 125800-02?Two buffered outputs are available at the front through coaxial connectors and two at the rear through Euro-style connectors.
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How much rack space does 3500/25 125800-02 require?The processor occupies one half-height front slot, while the I/O module occupies one full-height rear slot.
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What should be verified after commissioning 3500/25 125800-02?Confirm input polarity, trigger behavior, recovered speed and phase reference, and the buffered outputs used by dependent channels.
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