BENTLY 3500/72M

Description

Detailed parameter table

BENTLY 3500/72M

Product introduction

The 3500/72M from Bently Nevada is a high-precision temperature monitoring module designed for integration into 3500 Machinery Protection Systems, providing critical thermal data for rotating machinery health assessment. As a specialized 8-channel module, it fills a vital role in comprehensive machinery protection by complementing vibration and position measurements with accurate temperature readings from bearings, stators, and other critical components.

Unlike standalone temperature monitors, 3500/72M integrates seamlessly with the 3500 system architecture, sharing data via backplane communication with other modules while connecting to broader monitoring ecosystems through communication gateways like the 3500/05-01-01-00-00-01. This integration allows temperature data to be correlated with vibration patterns monitored by systems like the 9200-01-01-10-00 controller, creating a holistic view of machinery health.

In industrial protection systems, 3500/72M serves as the thermal sensing backbone, enabling early detection of overheating conditions that could indicate bearing failure, lubrication issues, or electrical faults. Its high accuracy and rapid response time ensure that potential problems are identified before they escalate into catastrophic failures, supporting both protective shutdowns and predictive maintenance strategies across critical industries.

Core advantages and technical highlights

Multi-sensor compatibility with precision: 3500/72M supports both RTDs and thermocouples across its 8 channels, providing flexibility to match specific temperature measurement requirements. For Pt100 RTDs, it delivers ±0.1°C accuracy at reference temperatures, ensuring precise monitoring of bearing temperatures where even small deviations can indicate emerging issues. This level of accuracy complements the vibration data from systems like the 9200-01-01-10-00 controller, enabling comprehensive fault diagnosis.

Independent channel configuration: Each of the 8 channels can be individually configured for sensor type, measurement range, and alarm thresholds, allowing customized monitoring for different machinery components. This flexibility enables the module to monitor everything from low-temperature bearing housings to high-temperature turbine casings within a single system, eliminating the need for multiple specialized temperature monitors.

Integrated alarm management: 3500/72M features configurable dual alarm levels per channel with adjustable time delays, ensuring reliable detection of temperature anomalies while preventing nuisance alarms from transient conditions. Alarm status is propagated through the 3500 backplane and can be transmitted to control systems via 3500/05-01-01-00-00-01 modules, enabling coordinated protective actions across the machinery protection ecosystem.

Seamless system synchronization: The module maintains precise time synchronization with other 3500 components and connected systems like the 9200-01-01-10-00 controller, ensuring that temperature events correlate accurately with vibration patterns and other machinery parameters. This synchronization is critical for root cause analysis, allowing engineers to determine whether thermal issues are causing vibration problems or vice versa.

Typical application scenarios

In steam turbine installations, 3500/72M modules monitor critical temperatures including journal bearing metal temperatures, thrust bearing temperatures, and turbine casing expansion. The module’s 8 channels accommodate multiple measurement points around the turbine, with RTD inputs providing precise data on bearing conditions. This thermal data is combined with vibration measurements from the 9200-01-01-10-00 controller, enabling operators to detect issues like insufficient lubrication that would manifest as both elevated temperatures and increased vibration.

Chemical processing plants utilize 3500/72M in pump and motor monitoring systems, tracking bearing temperatures and stator winding temperatures across multiple pieces of equipment. The module’s thermocouple inputs monitor higher-temperature components like motor stators, while RTDs track bearing conditions. By integrating with 3500/05-01-01-00-00-01 communication modules, temperature alarms are transmitted to the plant DCS, triggering cooling system adjustments or shutdowns before damage occurs.

Hydroelectric power facilities employ 3500/72M to monitor generator temperatures, including stator windings, bearing housings, and cooling system outlets. The module’s high-accuracy measurements ensure early detection of insulation degradation or cooling inefficiencies. When combined with vibration data from the 9200-01-01-10-00 controller, this creates a comprehensive health picture that supports both immediate protection and long-term maintenance planning for these capital-intensive assets.

BENTLY 3500/72M

Related model recommendations

9200-01-01-10-00: Controller that correlates vibration data with temperature readings from 3500/72M.

3500/05-01-01-00-00-01: Communication module transmitting 3500/72M data to control systems.

3500/15 106M1079-01: Power supply module providing regulated power to the temperature monitor.

330106-05-30-10-02-00: Proximity probe system whose vibration data complements 3500/72M temperatures.

3500/40M 140734-01: Vibration monitor that shares 3500 backplane with 3500/72M.

3500/25 184684-01: Relay module triggering protective actions based on 3500/72M alarms.

133819-02: Interface cable connecting temperature sensors to 3500/72M inputs.

3500/60 163179-01: Display module visualizing temperature data from 3500/72M.

Installation, commissioning and maintenance instructions

Installation preparation: Before installing 3500/72M, ensure the 3500 rack has a properly sized power supply (3500/15 106M1079-01 recommended) to accommodate the module’s power requirements. Verify two adjacent slots are available in the rack for the 2-slot module. Prepare sensor cabling using shielded twisted-pair wiring for RTDs and thermocouple-grade cabling for temperature sensors, routing cables away from high-voltage equipment to minimize noise. Ensure the installation environment maintains temperatures within 0°C to +60°C for optimal performance.

Maintenance suggestions: Include 3500/72M in quarterly system inspections, verifying all 8 channels display stable readings within expected ranges. Perform annual calibration verification using calibrated temperature references to ensure accuracy, particularly for critical bearing temperature channels. Inspect sensor connections for corrosion or loosening, cleaning terminals with approved contact cleaner as needed. Monitor alarm history logs to identify recurring temperature trends that might indicate sensor degradation or emerging machinery issues. Coordinate firmware updates with other 3500 modules to maintain system compatibility, especially when integrating with updated systems like the 9200-01-01-10-00 controller.

Service and guarantee commitment

Bently Nevada provides the 3500/72M with a 36-month warranty covering manufacturing defects and performance issues under normal operating conditions, including measurement accuracy, channel reliability, and backplane communication functionality when used with compatible 3500 series components. Our technical support team offers expert guidance on sensor selection, module configuration, and integration with complementary systems like the 9200-01-01-10-00 controller and 3500/05-01-01-00-00-01 communication modules.

We offer specialized training on temperature monitoring best practices, calibration procedures, and system integration specific to 3500/72M. Beyond the warranty period, our service agreements include calibration services, technical support, and expedited replacement to minimize system downtime. Bently Nevada’s commitment to quality ensures reliable temperature monitoring throughout the module’s operational lifecycle, backed by our global network of service professionals dedicated to protecting your critical machinery assets.