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- Bently Nevada
- 3500/25 126648-02
- Enhanced Keyphasor Module I/O 3500-25
- USA
- 88.9 mm × 266.7 mm × 165.1 mm
- 2.5kg
- Xiamen, China
- New & In Stock
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Product Overview: Bently Nevada 3500/25 126648‑02 Isolated Keyphasor I/O Module
The 3500/25 126648‑02 is an isolated Keyphasor I/O module crafted for rotating machinery monitoring systems, delivering robust electrical separation for phase-reference signals. It accepts dual sensor inputs—such as proximity probes, tachometer pickups, accelerometers, or velocity transducers—and outputs clean, isolated Keyphasor pulses for use in distributed diagnostics and control systems. This isolation enhances system reliability by mitigating noise and cross-talk when multiple systems share the phase signal.
Brand and Series
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Brand: Bently Nevada
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Series: 3500 Machinery Protection System – Keyphasor I/O Modules
Applications
Ideal applications include:
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Distributing phase-reference Keyphasor signals across multiple monitoring or control subsystems
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Performance-critical environments where phase signal integrity is essential
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Integration with diagnostic systems, turbine supervisory instrumentation, SCADA, or vibration analytics platforms
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Rotating machinery such as turbines, compressors, pumps, and generators in petrochemical, power, marine, and manufacturing sectors
Key Features and Advantages
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Dual-channel input supports redundancy with two separate sensors—enhancing system availability
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Signal isolation preserves phase-reference accuracy when shared across multiple systems
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Input conditioning and adjustable gain improve measurement accuracy and tuning flexibility
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Digital outputs ensure seamless integration into modern monitoring systems and support standard protocols
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Configurable alarm thresholds and delays enable advanced diagnostics (e.g., abnormal speed or position detection)
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Designed for industrial environments, operating from –40 °C to +70 °C and built to withstand up to 2g vibration (non-operational)
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 3500/25 126648‑02 |
| Function | Isolated Keyphasor I/O Module (external terminations) |
| Input Channels | Dual-channel (proximity probes, tachometer, accelerometer, velocity transducer) |
| Signal Conditioning | Input conditioning with adjustable gain |
| Output | Digital phase-reference outputs, supports Modbus, EtherNet/IP, Profibus protocols |
| Alarm Features | Configurable speed/position thresholds and delay triggers |
| Operating Voltage | 24 VDC (nominal), with optional redundant supply |
| Power Consumption | ≈ 7 W under typical conditions |
| Operating Temperature | –40 °C to +70 °C |
| Storage Temperature | –40 °C to +85 °C |
| Humidity | 5% to 95% RH, non-condensing |
| Vibration Tolerance | Up to 2g (non-operational) |
| Mounting | Standard 19-inch rack integration |
| Dimensions (W × H × D) | 88.9 mm × 266.7 mm × 165.1 mm |
| Weight | ≈ 2.5 kg |
| Certifications | UL, CSA, CE, RoHS; IEC 61010‑1 and IEC 61010‑2 compliant |
Related Models in the Same Series
| Model | Function | Dimensions (mm) | Weight (kg) |
|---|---|---|---|
| 3500/25 126648‑02 | Isolated Keyphasor I/O Module (this one) | 88.9 × 266.7 × 165.1 | ≈ 2.5 |
| 3500/25 126648‑01 | Keyphasor I/O Module (external termination) | Similar dimensions | ≈ 0.42 |
| 3500/25 125792‑01 | Enhanced Keyphasor Module | ≈ 206 × 32 × 190 | ≈ 0.34 |
| 3500/25 125800‑01 | Vibration Transmitter Module | ≈ 206 × 32 × 190 | ≈ 0.34 |
| 3500/26 125793‑01 | Vibration Monitor Module | ≈ 206 × 32 × 190 | ≈ 0.34 |
Popular Models from the Same Brand
| Model | Function | Dimensions (mm) | Weight (kg) |
|---|---|---|---|
| 3500/42M | Proximitor/Seismic Vibration Monitor | ≈ 483 × 178 × 89 | ≈ 7.7 |
| 3500/44M | Aeroderivative Gas Turbine Monitor | ≈ 483 × 178 × 89 | ≈ 7.7 |
| 3500/46M | Hydro Turbine Vibration Monitor | ≈ 483 × 178 × 89 | ≈ 7.7 |
| 3500/32M | 4-Channel Relay Output Module | ≈ 206 × 32 × 190 | ≈ 0.35 |
| 3500/65 | 16-Channel Temperature Monitor | ≈ 483 × 178 × 89 | ≈ 7.7 |
FAQ – Frequently Asked Questions
Q1: What sensors can be connected to this module?
A1: It accepts proximity probes, tachometer pickups, accelerometers, or velocity transducers via dual inputs for redundancy.
Q2: Does this module offer input conditioning?
A2: Yes, it features input signal conditioning along with adjustable gain for improved accuracy.
Q3: What type of output does it provide?
A3: It provides digital phase-reference outputs compatible with Modbus, EtherNet/IP, Profibus, and similar systems.
Q4: Can it trigger alarms based on abnormal conditions?
A4: Yes, alarms can be configured for rotational speed or position anomalies, with adjustable alarm thresholds and delay times.
Q5: Is it designed for high-reliability use?
A5: Yes; it operates from –40 °C to +70 °C, withstands up to 2g vibration (non-operational), and supports redundant power.
Q6: What mounting format is used?
A6: It fits into a standard 19‑inch rack for streamlined integration into industrial panels.
Q7: How much power does it consume?
A7: Approximately 7 W under normal operating conditions.
Q8: How heavy is the module?
A8: It weighs about 2.5 kg (5.5 lbs).
Q9: What certifications does it hold?
A9: It is certified for UL, CSA, CE, RoHS and complies with IEC 61010‑1 and IEC 61010‑2 standards.
Q10: What’s the difference between this and the 126648‑01 variant?
A10: The 126648‑02 is an isolated module supporting digital outputs and advanced alarm functions; the 126648‑01 provides basic external Keyphasor isolation with simpler outputs.
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