Bently Nevada 3500/65 172115-01 Temperature Monitor

Technical Specifications

Parameter	Details
Product Type	Temperature Monitor Module
Compatibility	Bently Nevada 3500 Series Monitoring System
Number of Channels	12 channels (RTD / TC / DC voltage)
Input Types	3-wire RTD, thermocouple (J, K, T, E), DC voltage
Input Impedance	10 MΩ for voltage, 300 Ω for TC, 100 nA for RTD
Measurement Range	–200 °C to 850 °C (RTD), 0 mV to 100 mV (TC)
Resolution	16-bit (0.01 °C for RTD, 0.1 °C for TC)
Accuracy	±0.1 % of reading + 0.1 °C
Sampling Rate	20 samples per second per channel
Alarm Outputs	6 dedicated relay outputs (form C)
Communication Protocol	Modbus RTU, Modbus TCP/IP
Dimensions (H x W x D)	241 mm x 48 mm x 254 mm
Weight	1.6 kg
Power Supply	24 VDC nominal (18 VDC to 32 VDC)
Power Consumption	12 W typical
Operating Temperature	–20 °C to +65 °C
Storage Temperature	–40 °C to +85 °C
Protection Class	IP20
Certifications	CE, CSA, ATEX, IEC 61508

Multi-Channel Temperature Measurement

The 3500/65 172115-01 temperature monitor provides 12 independent channels for comprehensive thermal monitoring in critical rotating machinery. This module accepts various sensor types, including 3-wire RTDs, thermocouples (J, K, T, E), and DC voltage inputs, offering exceptional application flexibility. The unit delivers 16-bit resolution, achieving 0.01 °C accuracy for RTD inputs and 0.1 °C for thermocouple measurements. Sampling occurs at 20 readings per second per channel, ensuring timely detection of temperature fluctuations in bearings, windings, and process fluids.

Alarm and Safety Features

The 3500/65 172115-01 includes six dedicated relay outputs, each configurable as form C contacts for alarm or shutdown signals. Users can set individual alarm thresholds for each channel, enabling customized protection strategies for different machine zones. Moreover, the module continuously performs self-diagnostics, verifying sensor integrity and internal circuit health to prevent false readings or undetected failures.

Communication and Data Integration

This temperature monitor supports both Modbus RTU (RS-485) and Modbus TCP/IP (Ethernet) protocols, allowing seamless integration with distributed control systems and plant-wide networks. Users can access real-time temperature data, historical trends, and alarm logs through the 3500 rack communication module. Additionally, the 3500/65 172115-01 interfaces with Bently Nevada System 1 software for advanced condition monitoring and predictive maintenance analytics.

Physical and Environmental Specifications

Weighing 1.6 kg and measuring 241 mm x 48 mm x 254 mm, the 3500/65 172115-01 occupies a full-height slot in the 3500 series rack. The module operates on 24 VDC nominal supply, consuming 12 W of power across the –20 °C to +65 °C industrial temperature range. Its robust IP20-rated housing protects sensitive measurement electronics from dust and accidental contact.