BENTLY 125720-01

Description

Detailed parameter table

BENTLY 125720-01

Product introduction

The 125720-01 from Bently Nevada is a high-performance dual-channel signal conditioning module, engineered to process and convert raw vibration sensor signals into standardized industrial outputs for machinery health monitoring systems. As a critical interface component in Bently Nevada’s monitoring ecosystem, this module bridges the gap between vibration sensors—such as accelerometers and velocity transducers—and industrial control systems, enabling precise measurement and analysis of machinery vibration.

Designed for flexibility and reliability, the 125720-01 accepts inputs from a wide range of vibration sensors and converts them into industry-standard 4-20mA signals proportional to vibration velocity or acceleration. Its dual-channel design allows simultaneous monitoring of two measurement points, making it ideal for cost-effective monitoring of pumps, motors, fans, and other rotating equipment. When paired with compatible sensors like the 330980-51-00 accelerometer and extension cables such as the 10244-27-50-01, the 125720-01 forms a complete vibration monitoring solution for predictive maintenance programs.

Core advantages and technical highlights

Dual-channel efficiency: The 125720-01’s two independent channels provide cost-effective monitoring of multiple machinery points in a single compact module, reducing installation space and wiring requirements compared to single-channel alternatives. Each channel features dedicated signal processing to ensure measurement accuracy and isolation, preventing cross-talk between channels even in electrically noisy environments.

Advanced signal processing: Equipped with precision analog-to-digital conversion and filtering, the 125720-01 enhances raw sensor signals by removing electrical noise and unwanted frequencies. Its configurable frequency response (0.5Hz to 10kHz) allows optimization for specific machinery types, ensuring accurate capture of both low-frequency structural vibrations and high-frequency bearing defects. The module maintains ±0.25% full-scale accuracy across its operating range.

Enhanced isolation protection: With 2.5kVrms isolation between channels and from inputs to outputs, the 125720-01 provides superior protection against ground loops, voltage transients, and electrical interference—common issues in industrial environments with multiple connected systems. This isolation ensures measurement stability and protects connected equipment from electrical faults.

Flexible integration: The 125720-01 simplifies system integration with its industry-standard 4-20mA outputs, compatible with virtually any PLC, DCS, or SCADA system. Optional RS485 Modbus RTU communication enables remote configuration, diagnostics, and parameter adjustment, reducing the need for on-site service visits. The module’s DIN rail mounting design facilitates easy installation in control cabinets.

Typical application scenarios

In water treatment plants, the 125720-01 monitors vibration on pump assemblies, with one channel connected to a bearing housing accelerometer and the second channel monitoring motor vibration. The module processes these signals into 4-20mA outputs for the plant’s SCADA system, enabling operators to detect early signs of bearing wear or impeller imbalance in critical water transfer equipment. Its rugged design withstands the humid environment typical in water treatment facilities.

Within automotive manufacturing plants, the 125720-01 is installed in production line control cabinets, processing vibration data from robotic welders and conveyor motors. The dual channels allow simultaneous monitoring of two critical components per module, optimizing cabinet space. The module’s noise filtering capabilities ensure accurate measurements despite electrical interference from welding equipment and motor drives.

In food and beverage processing facilities, the 125720-01 monitors vibration on mixers and bottling machinery, converting sensor signals into actionable data for the plant’s DCS. Its ATEX Zone 2 certification allows installation in areas with potentially explosive dust atmospheres, while the isolated channels prevent electrical interference from nearby cleaning equipment. The module’s reliable performance helps maintain production efficiency by detecting equipment issues before failures occur.

BENTLY 125720-01

Related model recommendations

125720-02: A 4-channel variant of the 125720-01 for monitoring multiple machinery points in larger systems.

330980-51-00: An accelerometer commonly paired with the 125720-01 for vibration measurement.

10244-27-50-01: An extension cable that connects vibration sensors to the 125720-01 module.

133292-01: A junction box that provides secure termination for sensors connected to the 125720-01.

330180-91-CN: A calibration tool used to verify the combined performance of sensors and the 125720-01.

3500/20: A power supply module that provides stable 24V DC power to the 125720-01.

3500/22-01-00: A display module that visualizes vibration data processed by the 125720-01.

Installation, commissioning and maintenance instructions

Installation preparation: Before installing the 125720-01, ensure the DIN rail is securely mounted in a clean, dry enclosure with adequate ventilation. Verify the 24V DC power supply is properly regulated and grounded. Plan sensor cable routing using shielded twisted-pair cables like the 10244-27-50-01 to minimize electromagnetic interference. For hazardous area installations, confirm the location classification matches the module’s ATEX Zone 2 rating.

Mounting procedure: Secure the 125720-01 to the DIN rail, ensuring proper alignment and secure engagement. Connect the 24V DC power supply, observing correct polarity. Wire vibration sensors to the input terminals, ensuring proper shield grounding at the module end. Connect the 4-20mA outputs to the control system, using twisted-pair cable for noise immunity. For Modbus communication, connect the RS485 bus and configure baud rate and address settings.

Maintenance suggestions: Inspect the 125720-01 quarterly for loose connections, dust accumulation, or signs of overheating. Clean dust from ventilation slots using compressed air to maintain thermal performance. Verify output signals correspond to known vibration levels using a calibrated meter. Perform annual calibration using a vibration calibrator connected directly to the input terminals. Use the optional Modbus interface to check diagnostic status and parameter settings remotely, reducing maintenance downtime.

Service and guarantee commitment

The 125720-01 is backed by a 3-year warranty covering defects in materials and workmanship under normal operating conditions. Bently Nevada’s global technical support team provides expert assistance for installation, configuration, and troubleshooting, with 24/7 availability for critical system issues.

We offer detailed configuration software and user manuals for the 125720-01, simplifying setup and parameter adjustment. Calibration services are available to ensure measurement accuracy and compliance with industry standards. Training programs cover module configuration, vibration analysis, and system integration, helping users maximize the value of their monitoring systems. Backed by Bently Nevada’s expertise in industrial vibration monitoring, the 125720-01 delivers reliable signal conditioning performance for protecting critical machinery assets.