Description
Detailed parameter table
| Parameter name | Parameter value |
| Product model | 3500/32 |
| Manufacturer | Bently Nevada |
| Product category | Machinery Protection System I/O Module Series |
| Channel configuration | 8 configurable input channels, 4 relay output channels (standard configuration) |
| Input type support | 4-20 mA, mV, RTD, thermocouple (Type J/K/T/E/R/S/B) |
| Output rating | 5 A @ 250 VAC, 5 A @ 30 VDC per relay (standard) |
| Sampling rate | Up to 100 Hz per input channel |
| Accuracy | ±0.1% of reading (analog inputs), ±0.5°C (temperature inputs) |
| Operating voltage | 5 VDC, ±15 VDC (from 3500 series rack backplane) |
| Power consumption | 6-8 W (varies by specific variant) |
| Operating temperature | 0°C to +60°C (32°F to +140°F) |
| Form factor | 3500 system rack mount (1 slot width) |
| Dimensions | 133 mm (H) × 36 mm (W) × 229 mm (D) (5.2″ × 1.4″ × 9.0″) |
| Compatibility | 3500 series racks (including 125744-02), communication gateways, sensor cables |
| Certification | UL, CE, RoHS compliant, IEC 61010-1 approved |
BENTLY 3500/32
Product introduction
The 3500/32 from Bently Nevada is a highly versatile input/output module series that forms a critical expansion component of the 3500 Machinery Protection System family. Designed as the primary interface between external process sensors and the core protection system, the 3500/32 series enables the seamless integration of diverse measurement parameters into machinery health monitoring strategies. This 1-slot module series bridges the gap between specialized vibration monitoring components and general process instrumentation, creating a unified protection ecosystem.
Bently Nevada’s 3500/32 series serves as the system’s flexible I/O backbone, complementing vibration data from sensors connected via cables like 136711-01 with essential process variables. Whether monitoring temperature, pressure, flow, or custom parameters, these modules integrate measurements into the 3500 data stream, making information accessible through communication gateways such as 140734-01. The 3500/32 series empowers users to develop comprehensive protection logic that combines machinery condition and process performance for complete asset protection.
Core advantages and technical highlights
Versatile signal integration: The 3500/32 series supports a wide range of input types without requiring additional signal conditioning equipment. This versatility allows users to connect RTDs, thermocouples, 4-20 mA transmitters, and mV-level sensors directly to the module, eliminating compatibility barriers between different measurement technologies and simplifying system design.
Precision measurement capability: Equipped with high-performance analog-to-digital converters, the 3500/32 series delivers consistent measurement accuracy across all input types. This precision ensures that process variables are monitored with the same reliability as machinery vibration data, enabling meaningful correlation between process conditions and equipment health.
Flexible control functionality: With four independently configurable relays, the 3500/32 series provides versatile actuation capabilities for alarms, shutdowns, or control functions. Relay logic can be programmed to respond to complex conditions involving both module inputs and data from other 3500 system components, supporting sophisticated protection strategies tailored to specific machinery requirements.
Seamless system integration: Designed exclusively for 3500 series racks, the 3500/32 series modules connect directly to the system backplane for both power and communication. This integration ensures automatic recognition by the system, immediate data availability to all connected components, and simplified configuration through standard 3500 software tools.
Typical variants and applications
Standard variant (exemplified by 125712-01)
The most common implementation of the 3500/32 series, typified by 125712-01, finds widespread use in power generation turbine protection systems. Installed in 125744-02 racks, these modules monitor bearing temperatures, lubrication system pressures, and control valve positions, integrating this data with vibration measurements from 136711-01 connected sensors. Their relays provide critical actuation for cooling system adjustments and alarm notifications based on combined machinery and process conditions.
Enhanced temperature monitoring variant
Specialized versions of the 3500/32 series optimized for temperature measurement excel in oil and gas compressor applications. These modules connect to multiple thermocouples monitoring interstage compressor temperatures, providing precise thermal profiles that complement vibration data. Their enhanced cold-junction compensation ensures accurate temperature measurement across extended operating ranges typical in hydrocarbon processing.
High-density process variant
Configured for maximum process variable integration, certain 3500/32 variants serve manufacturing facilities with complex production lines. These modules connect to pressure transmitters, flow meters, and level sensors throughout production equipment, providing the process context needed to distinguish between mechanical faults and process-induced machinery issues, minimizing unnecessary shutdowns.
BENTLY 3500/32
System integration ecosystem
The 3500/32 series forms a critical link within the 3500 ecosystem, connecting with key components:
125744-02 racks provide physical mounting and backplane connectivity
140734-01 communication gateways distribute 3500/32 data to external systems
136711-01 sensor cables deliver vibration data that complements 3500/32 measurements
3500/22M power supplies provide reliable power through the rack infrastructure
3500/60 163179-01 display modules visualize 3500/32 input data locally
3500/42M vibration monitors share data with 3500/32 for combined protection logic
3500/15 relay modules extend the output capabilities when additional actuation points are needed
This integrated ecosystem enables comprehensive monitoring strategies that combine machinery health and process performance data.
Installation, commissioning and maintenance guidelines
Installation preparation: Before installing any 3500/32 module, verify compatibility with the target 3500 rack firmware version and ensure adequate power budget. Select appropriate module variants based on specific input requirements (thermocouple types, RTD configurations, etc.). Gather necessary tools including torque screwdrivers, calibration equipment, and configuration software. Inspect modules for shipping damage, paying particular attention to input/output connectors.
Maintenance best practices: Include all 3500/32 modules in quarterly system health checks, verifying status indicators and communication links. Perform annual calibration using certified standards to maintain measurement accuracy, with special attention to temperature inputs requiring periodic cold-junction verification. Test relay outputs during scheduled maintenance by activating each relay and confirming proper contact operation. Keep module firmware updated to ensure compatibility with evolving system components and features.
Service and guarantee commitment
Bently Nevada stands behind the 3500/32 series with comprehensive support services and a 36-month warranty covering manufacturing defects and performance issues for all variants, including measurement accuracy, relay functionality, and communication capabilities. Our technical support team provides expert guidance on module selection, configuration, and integration with other 3500 components.
We offer specialized training on 3500/32 programming, signal conditioning, and protection logic development tailored to specific industrial applications. Beyond the warranty period, our service agreements include calibration verification, technical support, and expedited replacement services to minimize system downtime. Bently Nevada’s commitment to quality ensures reliable performance of 3500/32 modules throughout their operational lifecycle, backed by our global network of service professionals.
