1. Product Description The BENTLY 3500/50Mis a dual-channel tachometer module designed for real-time monitoring of shaft speed, acceleration, and direction in rotating machinery. As part of the BENTLY 3500 modular monitoring system, it accepts inputs from proximity probes or magnetic pickups to ensure precise measurements. The module supports configurable alarm setpoints, zero-speed detection, and reverse-rotation notifications, making it ideal for critical applications in power generation, oil & gas, and manufacturing. Its integration with the BENTLY 3500 Rack Configuration Software enables easy customization, while compatibility with System 1 software allows for advanced analytics and predictive maintenance.
2. Technical Parameters
Parameter
Specification
Input Voltage
24 VDC ±10% (module operation)
Power Supply
85–264 VAC or 20–30 VDC (external input)
Channels
Dual-channel (A and B) for redundancy
Speed Range
0–100,000 RPM (configurable)
Input Signals
Proximity probe (±24 VDC) or magnetic pickup
Alarm Outputs
4 solid-state relays (2 per channel)
Communication
Modbus RTU (RS-485) for integration with PLC/DCS
Operating Temperature
-40°C to +70°C
Compatibility
BENTLY 3500 racks, System 1 software
BENTLY 3500/50M
3. Advantages and Features
Dual-Channel Redundancy: Ensures continuous operation by comparing two independent speed signals.
Keyphasor Integration: Eliminates the need for a separate keyphasor module by providing conditioned signals to the 3500 rack.
Peak Hold Function: Stores maximum speed and reverse-rotation events for post-incident analysis.
Hot-Swap Capability: Allows module replacement without system shutdown.
4. Application Fields and Case Studies
Energy: Monitoring gas turbine speed in power plants.
Oil & Gas: Protecting compressors in offshore platforms.
Manufacturing: Controlling conveyor systems in automotive assembly lines.
Case Study: A petrochemical plant reduced downtime by 20% using the 3500/50M to detect and alarm early signs of rotor imbalance in a centrifugal compressor.
5. Competitor Comparison The 3500/50M differentiates itself with:
Built-in redundancy for SIL 2 compliance, reducing reliance on external safety systems.
Faster response time (≤10 ms) compared to legacy tachometers.
Seamless integration with BENTLY’s comprehensive System 1 analytics suite.
BENTLY 3500/50M
6. Selection Recommendations
System Integration: Pair with BENTLY 3500/22M frame interface module for centralized data management.
Safety Requirements: Opt for dual-channel configuration in applications requiring high reliability.
Expansion Needs: Reserve rack slots for future modules like vibration or displacement monitors.
7. Precautions
Sensor Calibration: Ensure proper alignment of proximity probes or magnetic pickups.
Power Stability: Use filtered power supply to prevent voltage fluctuations.
Firmware Updates: Regularly update to access new features and enhance security.
Shanxi Xinyeda International Trade Co., Ltd. offers BENTLY 3500/50M and automation solutions. Visit www.xydcontrol.com for sales and technical support.
We've got you covered
We give you access to a global supply of automation parts at your fingertips, ensuring that manufacturers around the world can avoid unnecessary downtime and continue to do what they do best – making our world possible.
Full 12-month warranty on all components
Dedicated after-sales support
Same-day dispatch on 1000s of parts
All units are fully tested
Continue Searching
We're here when you need us
What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
Full 12-month warranty
Available for dispatch immediately
We deliver worldwide
Full 12-month warranty on all components
Full 12-month warranty on all components
