BENTLY 3500/65 145988-02 Temperature Monitor Module

Overview

The 3500/65 module occupies a single slot in a 3500 rack and interfaces directly with the rack interface module (RIM) and other monitors. Each channel can be independently configured for sensor type, temperature range, alarm setpoints, and hysteresis. The module continuously compares measured temperatures against programmed alarm levels and communicates status to the rack for relay actuation and data logging. The 145988-02 variant includes enhanced isolation and fast scanning for demanding applications.

Key Features

• 16 Independent Channels: Simultaneous monitoring of up to 16 temperature points.

• Sensor Flexibility: Accepts Pt100 RTDs (2/3/4 wire) and thermocouples types J, K, T, E.

• High Accuracy: ±0.1% of full scale for RTDs, ±1°C for thermocouples.

• Programmable Alarms: Two alarm setpoints per channel with adjustable delay and hysteresis.

• Cold‑Junction Compensation: Internal for thermocouple inputs, with optional external reference.

• Isolation: Channel‑to‑channel and channel‑to‑ground isolation to prevent ground loops.

• Data Output: Temperature values available via the rack communication bus for display or export.

Technical Specifications

• Input Types: RTD (Pt100, Ni120) and thermocouple (J, K, T, E, N, R, S).

• Measurement Ranges: -200°C to +850°C (RTD), -200°C to +1760°C (thermocouple).

• Scan Rate: 10 channels per second (all channels updated every 1.6 seconds).

• Resolution: 0.1°C.

• Power Supply: 5 VDC from rack backplane.

• Operating Temperature: -30°C to +65°C.

• Certifications: CSA, CE, ATEX (for use in safe areas).

Applications

The 3500/65 is essential for protecting machinery where temperature is a critical parameter. Typical applications include monitoring turbine bearing temperatures, generator stator winding temperatures, compressor discharge temperatures, and pump bearing temperatures. It integrates seamlessly with other 3500 modules to provide a complete picture of machine health.

Configuration and Integration

The module is configured using the 3500 System Configuration Software. Users select sensor type, engineering units, alarm setpoints, and relay mapping. The module stores its configuration in nonvolatile memory and can be hot‑swapped if replacement is needed. Data from the 3500/65 can be accessed by plant DCS or condition monitoring software via optional communication gateways.

In summary, the BENTLY 3500/65 145988-02 temperature monitor module delivers precise and reliable temperature measurement for comprehensive machinery protection, helping to prevent overheating and extend equipment life.