Description
Product Core Brief
- Model: 3500/65 145988-02
- Brand: BENTLY NEVADA
- Series: 3500 Machinery Protection System
- Core Function: Acquires 16 independent RTD or thermocouple signals for high-density thermal monitoring.
- Product Type: 16-Channel Temperature Monitor
- Key Specs: 16 Channels | RTD/TC Input | ~3 W Power
- Condition: New Original (New Surplus)
BENTLY 3500/65 145988-02
Product Introduction
BENTLY 3500/65 145988-02 is a high-density 16-channel temperature monitor for the 3500 Machinery Protection System. It accepts RTD and thermocouple inputs to provide comprehensive thermal coverage for large rotating machinery.
Unlike the 6-channel 3500/60, this unit maximizes rack slot efficiency by doubling the channel count. Each channel is independently programmable for sensor type, range, and alarm limits via configuration software.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Module Type | 16-Channel Temperature Monitor |
| Part Number | 145988-02 |
| Supported Inputs | RTD (3-wire, 4-wire), Thermocouple |
| Channel Count | 16 Independent Channels |
| Power Consumption | ~3 W (Typical) |
| Operating Temperature | -30 °C to +65 °C |
| Storage Temperature | -40 °C to +85 °C |
| Configuration Tool | 3500 Rack Configuration Software |
| Redundancy Support | Triple Modular Redundancy (TMR) |
| Compliance | API 670 |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: We check source traceability and verify serial numbers against anti-counterfeit databases. Visual inspection confirms no physical damage or connector corrosion.
- Live Functional Test: Power-on self-checks validate basic operation. We run continuous load tests exceeding 24 hours with temperature logging to ensure stability.
- Electrical Parameter Test: Insulation resistance is verified using a 500 V Megger, requiring >10 MΩ. Ground continuity is also strictly checked.
- Firmware Verification: We read and record internal firmware versions. DIP switch and jumper settings are photographed for future reference.
- Final QC & Packaging: The unit is sealed in an anti-static bag. A QC Passed label with the inspection date is applied before shipping.
BENTLY 3500/65 145988-02
Replacement Pitfall Guide
❗ Sensor Type Configuration: Each of the 16 channels must be individually configured for the specific sensor type (e.g., 3-wire RTD vs. Type K TC). Mismatched configuration causes invalid readings and false alarms.
❗ TMR Installation Rules: For Triple Modular Redundancy, you must install three identical 3500/65 modules in adjacent slots. The system uses voting logic to prevent single-point failures.
❗ Recorder Output Limitation: The 3500/65 does not provide individual analog recorder outputs. If you need buffered analog outputs for trending, you must use the 3500/61 or route data via the TDI module.
❗ Power Budget Check: While efficient at ~3 W, adding multiple 16-channel modules can strain the rack power supply. Always calculate total rack load and maintain a 20% headroom margin.
❗ ESD Damage: Use an anti-static mat during installation. Dry environments significantly increase electrostatic discharge risks to sensitive electronics.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
- 3500/65 145988-02 → 3500/60 : Needs Adaptation — 16-Channel vs. 6-Channel Density
- 3500/65 145988-02 → 3500/61 : Needs Adaptation — Standard Monitor vs. Recorder Output Version
- 3500/65 145988-02 → 3500/62 : Incompatible — Temperature vs. Process Variable Monitor
- Scan Cycle: < 1 ms (simulated load, 16 I/O points)
- Comms Throughput: Backplane interface (Modbus TCP via 3500/22M TDI)
Need to verify your RTD wiring scheme or calculate total rack power for a TMR setup? I can confirm the exact sensor configuration and redundancy requirements for your compressor or turbine application.
