Description
Product Core Brief
- Model: 3500/60
- Brand: Bently Nevada
- Series: 3500 Machinery Protection System
- Core Function: Provides multi-channel temperature monitoring and protection for critical rotating assets.
- Product Type: 6-Channel Temperature Monitor Module
- Key Specs: 6 Channels | RTD & Thermocouple Inputs | Programmable Alarms | No Recorder Outputs
- Condition: New Original (New Surplus)
BENTLY 3500/60
Product Introduction
BENTLY 3500/60 is a multi-channel temperature monitor designed for the Bently Nevada 3500 Machinery Protection System. It is specifically engineered to acquire RTD and thermocouple signals and drive protection alarms for bearings, windings, and process-critical points.
This module provides six independent temperature monitoring channels that accept both Resistance Temperature Detectors (RTD) and Thermocouple (TC) inputs. The 3500/60 continuously conditions these inputs and compares them against user-programmable alarm setpoints. It is important to note that while the 3500/60 and 3500/61 share identical functionality, the 3500/60 does not provide recorder outputs for its channels (unlike the 3500/61).
Key Technical Specifications
- Module Type: 6-Channel Temperature Monitor
- Form Factor: Full-Height
- Channels: 6 Independent Temperature Monitoring Channels
- Input Sensors: RTD (Pt100, 2- or 3-wire) and Thermocouples (Types J, K, T, E, R, S, B, N)
- Features: Onboard Cold Junction Compensation (CJC) for accurate TC readings
- Outputs: Digital alarm outputs (Alert/Danger); No analog recorder outputs
- Software Requirements: 3500 Rack Configuration Software
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: Trace source via serial number. Inspect front panel connectors and rear I/O module connections for physical damage.
- Visual Inspection: Verify module seating alignment and check for any PCB corrosion or flux residue.
- Live Functional Test: Install in rack. Verify communication with RIM/TDI and confirm “OK” LED illuminates.
- Signal Path Test: Inject simulated RTD or TC signal. Verify accurate temperature calculation and alarm triggering in software.
- Final QC & Packaging: Seal in anti-static bag. Apply QC Passed label with date.
Replacement Pitfall Guide
❗ Recorder Output Limitation: The 3500/60 does not provide 4-20 mA recorder outputs for its channels. If your application requires analog recorder outputs for trending, you must use the 3500/61 module instead.
❗ Sensor Flexibility: The non-isolated I/O version allows you to mix RTD and Thermocouple inputs on the same module. Ensure the correct I/O module suffix is selected based on your isolation and sensor requirements.
❗ TMR Configuration: If used in a Triple Modular Redundant (TMR) configuration, three 3500/60 modules must be installed in adjacent slots. The system will employ voting logic to ensure accurate operation and avoid single-point failures.
❗ Factory Unconfigured: When shipped from the factory, the 3500/60 module is unconfigured. It must be installed into a 3500 framework and programmed using the 3500 Rack Configuration Software to define channel types and alarm setpoints.
❗ High-Temp Environment Limitations: If operating in environments above +35°C and using isolated TC I/O modules with E-type thermocouples, the usable full-scale temperature range is reduced to -60°C to +1000°C. Do not configure channels below -100°C in this scenario.
Keep these in mind and you’ll cut 90% of rework time.
BENTLY 3500/60
Compatibility Matrix & Benchmarks
- 3500/60 → 3500/61 : Alternative — Use 3500/61 if 4-20 mA recorder outputs are required
- 3500/60 → 3500/22M : Complementary — Requires TDI module for rack communication
- 3500/60 → 3500/33 : Complementary — Drives relay logic for high-temperature trips
Benchmarks:
- Alarm Setpoint Accuracy: Within 0.13% of desired value
- Supported TC Types: J, K, T, E, R, S, B, N
