Product Introduction
The Bently Nevada 3500/65 (Part Number 145988-02) is a 16‑Channel Temperature Monitor for the 3500 Series machinery protection system. It is designed to continuously monitor temperature inputs from RTDs (Resistance Temperature Detectors) and thermocouples (types J, K, T, E, etc.). The monitor provides programmable Alert and Danger alarm setpoints for each channel, and outputs temperature values via the 3500 rack backplane to other modules (e.g., relay modules or communication interfaces). The 145988-02 variant typically includes isolated inputs and enhanced diagnostic capabilities. The 172103-01 is a matching internal termination board (I/O module) that provides screw‑terminal connections for field wiring, allowing easy connection of up to 16 temperature sensors. The monitor occupies one full‑height slot in a 3500 rack; the termination board mounts inside the rack behind the monitor.
Parameters
| Parameter | Specification |
|---|---|
| Monitor Module (3500/65) | |
| Model / Part Number | 3500/65 145988-02 |
| Product Type | 16‑Channel Temperature Monitor |
| Number of Input Channels | 16 (isolated, configurable per channel) |
| Input Types | RTD (2‑wire or 3‑wire Pt100, Ni120) and Thermocouple (J, K, T, E) |
| Outputs (per channel) | Temperature value (via backplane), optional 4‑20 mA recorder outputs |
| Alarm Outputs | Programmable Alert and Danger per channel (via 3500 relay module) |
| Slot Width | 1 full‑height slot in 3500 rack |
| Dimensions (W × H × D) | 24.9 × 241.3 × 218.4 mm (0.98 × 9.50 × 8.60 in) |
| Weight (monitor only) | 0.45 kg (1.0 lb) |
| Termination Board (172103-01) | |
| Part Number | 172103-01 |
| Function | Internal termination / barrier strip for field wiring (16 channels) |
| Connector Type | Removable screw terminals (accepts up to 16 AWG wire) |
| Dimensions (W × H × D) | 19.0 × 76.2 × 50.8 mm (0.75 × 3.0 × 2.0 in) (approx.) |
| Weight (board only) | 0.09 kg (0.2 lb) |
| Combined Weight | 0.54 kg (1.2 lb) |
| Operating Temperature (monitor) | 0 to +65 °C (32 to +149 °F) |
| Storage Temperature | –40 to +85 °C (–40 to +185 °F) |
| Humidity | 5% to 95% non‑condensing |
| Accuracy | ±0.1% of reading ±1 °C (typical) |
| Isolation | 1500 Vrms channel‑to‑channel and channel‑to‑ground |
| Certifications (typical) | CSA, ATEX, IECEx (for safe area rack installation) |
Application Scenarios
Bearing Temperature Monitoring – Measures temperature from RTDs embedded in bearings of steam turbines, gas turbines, compressors, and large motors, providing early warning of overheating and preventing bearing seizure.
Process Temperature Protection – Used in refineries, chemical plants, and power stations to monitor process fluid temperatures (e.g., lube oil, coolant, steam) and initiate alarms or shutdowns on abnormal thermal conditions.
Generator and Transformer Monitoring – Monitors stator winding, core, and bearing temperatures on large generators, as well as oil temperatures on transformers, ensuring reliable electrical asset operation.
Multiple Sensor Types in One Module – The ability to mix RTDs and thermocouples on the same module simplifies installation on machinery with diverse temperature measurement requirements (e.g., a gas turbine with bearing RTDs and exhaust thermocouples).
Integration with 3500 Relay Modules – Alerts from the temperature monitor are sent via backplane to a 3500/32 relay module for direct machine shutdown or annunciation, forming a complete protection system.
Retrofit and System Expansion – Adds high‑density temperature monitoring to existing 3500 racks, replacing older point‑to‑point temperature controllers with a centralized, programmable solution that integrates with vibration and position protection.
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Each product has been tested by our technicians, providing 12-month long warranty, worry-free after-sales
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7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
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