BENTLY 125680-01

Description

Detailed parameter table

BENTLY 125680-01

Product introduction

The 125680-01 from Bently Nevada is a precision vibration transmitter module designed to convert raw vibration signals into industry-standard 4-20 mA outputs for integration into 3500 Machinery Protection Systems. This compact module serves as a critical interface between vibration sensors and monitoring/control systems, providing conditioned, standardized signals that simplify integration with both Bently Nevada equipment and third-party systems. Bently Nevada’s 125680-01 acts as a signal translator in the measurement chain, converting high-impedance voltage signals from sensors like the 133396-01 accelerometer into robust current signals that can be transmitted over long distances to 136188-01 input modules and other monitoring components.

Bently Nevada’s 125680-01 addresses the need for reliable vibration data transmission in industrial environments where long cable runs and electrical noise can degrade voltage-based signals. Its 4-20 mA output is inherently noise-resistant, ensuring vibration measurements remain accurate even in electrically harsh environments. When paired with 133396-01 accelerometers, this transmitter delivers consistent vibration amplitude data that flows through 3500/34 communication gateways to both local displays and enterprise systems, supporting both protection and process optimization initiatives.

Core advantages and technical highlights

Industry-standard output: The 125680-01 converts vibration signals into robust 4-20 mA current outputs that are universally compatible with PLCs, DCS systems, and SCADA platforms. This standardization simplifies integration with both Bently Nevada’s 3500 system components and third-party monitoring equipment, eliminating the need for custom interface hardware.

Dual-channel flexibility: With two independent input channels, the module can process signals from two separate sensors (such as 133396-01 accelerometers) or from different measurement axes on the same machinery. Each channel features dedicated conditioning circuitry, ensuring cross-talk-free operation and enabling simultaneous monitoring of multiple vibration parameters.

Noise-immune transmission: By converting voltage signals to 4-20 mA current loops, the 125680-01 provides superior noise immunity compared to voltage-based transmission. This characteristic makes it ideal for installations with long cable runs or high electrical noise, ensuring vibration data remains accurate from sensor to monitoring system.

Field-configurable operation: The module offers field-adjustable zero and span settings that allow calibration to specific measurement ranges without specialized tools. This flexibility enables quick setup and adaptation to changing monitoring requirements, supporting both standard and custom vibration measurement scenarios.

Typical application scenarios

In power generation facilities, the 125680-01 is deployed to transmit bearing vibration data from turbine and generator systems. It accepts signals from 133396-01 accelerometers mounted on bearing housings, converting their AC voltage outputs to 4-20 mA signals proportional to vibration amplitude. These signals are transmitted to both local 136188-01 modules for protection and to plant DCS systems via 3500/34 gateways, providing operators with visibility to critical machinery health parameters alongside process data.

Oil and gas production facilities utilize the 125680-01 in remote pump stations, where its noise-immune 4-20 mA outputs ensure reliable vibration data transmission over long distances to central monitoring systems. The module processes signals from submersible pump accelerometers, converting them into standardized outputs that trigger alarms in SCADA systems when vibration exceeds predefined thresholds. Its DIN rail mounting design simplifies installation in remote junction boxes, supporting distributed monitoring architectures.

Manufacturing plants deploy the 125680-01 on production line machinery to integrate vibration monitoring with process control systems. The module accepts conditioned signals from 140471-01 conditioning modules, converting them into 4-20 mA outputs that feed directly into PLCs. This integration allows production systems to automatically adjust machine operation or shut down equipment when excessive vibration is detected, preventing damage to both machinery and products.

BENTLY 125680-01

Related model recommendations

133396-01 (Bently Nevada): Accelerometer whose signals are processed by 125680-01.

140471-01 (Bently Nevada): Signal conditioning module feeding inputs to 125680-01.

3500/34 (Bently Nevada): Communication gateway transmitting data from 125680-01.

136188-01 (Bently Nevada): Signal input module receiving outputs from 125680-01.

3500/05-01-02-00-00-01 (Bently Nevada): Power supply for the 125680-01 module.

163179-01 (Bently Nevada): Extension cable connecting sensors to systems using 125680-01.

330130-080-00-00 (Bently Nevada): Calibration fixture for 125680-01 verification.

3500/60 (Bently Nevada): Display module visualizing data from 125680-01 transmitters.

Installation, configuration and maintenance instructions

Installation preparation: Before installing the 125680-01, verify compatibility with connected sensors (such as 133396-01 accelerometers) and receiving systems. Choose a mounting location within the 0°C to +60°C operating range with protection from moisture and excessive vibration. Required tools include a screwdriver set, wire strippers, torque wrench, and calibration equipment. Inspect the module for shipping damage, checking for loose components or damaged connectors.

Mounting and wiring: Install the 125680-01 on a standard DIN rail or via panel mount holes, ensuring secure attachment. Connect 24 VDC power from the 3500/05-01-02-00-00-01 supply, observing correct polarity to prevent damage. Wire sensor inputs using shielded twisted-pair cable, connecting accelerometer signals to the appropriate channel inputs. Connect 4-20 mA outputs to receiving equipment, using twisted-pair cable for noise immunity. Ground cable shields at the module end only to prevent ground loops.

Configuration procedures: Power on the system and allow the module to stabilize for 30 minutes before calibration. Use the front-panel adjustment potentiometers or software tools to set zero (4 mA) and span (20 mA) points, using a calibrated signal generator or known vibration source. Configure each channel for the specific sensor type and measurement range (e.g., 0-50 g for 133396-01 accelerometers). Verify output linearity across the measurement range using a precision multimeter.

Maintenance suggestions: Include the 125680-01 in semi-annual maintenance checks, verifying power supply voltage, output signal integrity, and connection security. Clean the module housing and ventilation openings to prevent dust accumulation. During scheduled shutdowns, recalibrate the module using the 330130-080-00-00 fixture to ensure measurement accuracy. Check for firmware updates annually if the module includes software-configurable features. If signal degradation is detected, verify sensor connections and calibration before suspecting hardware failure.

Service and guarantee commitment

Bently Nevada provides the 125680-01 with a 30-month warranty covering manufacturing defects and performance issues under normal operating conditions, including signal accuracy and channel isolation. Our technical support team offers expert guidance on proper installation, calibration procedures, and integration with 133396-01 accelerometers, 140471-01 conditioning modules, and 3500/34 communication gateways.

We offer specialized training on vibration signal transmission, 4-20 mA loop principles, and calibration techniques specific to the 125680-01. Beyond the warranty period, our service agreements include calibration verification, performance testing, and expedited replacement services to minimize downtime. Bently Nevada’s commitment to quality ensures the 125680-01 delivers reliable signal translation throughout its operational lifecycle, backed by our global network of service professionals and application engineers.