Description
Product Core Brief
- Model: 133819-01
- Brand: Bently Nevada
- Series: 3500 Machinery Protection System
- Core Function: Provides non-isolated RTD/TC signal conditioning with internal terminations for the 3500/60 temperature monitor.
- Product Type: RTD/TC Non-Isolated I/O Module
- Key Specs: Internal Terminations | Non-Isolated | 3500/60 Compatible
- Note: Verify if your application requires isolated (133835-01) or external termination (133827-01) variants.
Bently Nevada 133819-01
Key Technical Specifications
- Compatible Monitor: 3500/60 RTD/TC Temperature Monitor
- Sensor Types: RTD (Pt100, Pt1000, Ni120, Cu10) and Thermocouple (J, K, T, E, R, S, B, N)
- Termination Type: Internal (screw terminals on front of module)
- Isolation: Non-Isolated (Common ground reference)
- Channels: 4 channels per module
- Accuracy: ±0.5% of full scale (RTD), ±1.0% of full scale (TC)
- Operating Temp: -30 °C to +65 °C (-22 °F to +150 °F)
- Humidity: 95% non-condensing
- Power Consumption: ~2.5 Watts
- Mounting: 3500 Rack Backplane
Product Introduction
The Bently Nevada 133819-01 is a non-isolated RTD/TC I/O module with internal terminations, designed specifically for the 3500/60 temperature monitor. It accepts direct RTD or thermocouple inputs and provides precision signal conditioning for bearing metal temperature, lube oil temperature, and other thermal parameters.
This module eliminates the need for external termination blocks, reducing panel wiring complexity and installation time. Its non-isolated design is suitable for applications where all sensors share a common ground reference, making it ideal for standard machinery protection installations.
QA & Testing SOP (Transparency Building)
- Incoming Inspection: Verify serial number traceability against OEM records; inspect front terminal block for stripped threads or corrosion; confirm anti-static packaging integrity.
- Live Testing: Install in 3500/60 test rack; verify OK LED and backplane communication; inject precision RTD simulator values at multiple points to validate temperature scaling accuracy.
- Electrical Testing: Measure insulation resistance (>10 MΩ at 500VDC); verify ground continuity <0.1 Ω; check internal terminal block contact resistance.
- Firmware/Config Backup: Record exact firmware revision via 3500 Configuration Software; photograph all DIP switches and jumper settings before packing.
- Final QC & Packaging: Apply QC pass tag with test date; pack in OEM-spec anti-static bag with foam corner protectors; seal in individual box with documentation.
Bently Nevada 133819-01
Installation Pitfalls & Guide (Engineer to Engineer)
❗ Firmware Rev Mismatch: Mixing revisions in a 3500/60 slot can cause temperature scaling errors or communication timeouts. Always match the exact revision of the replaced unit or update the entire frame via 3500 Configuration Software before commissioning.
❗ DIP Switch/Jumper Errors: RTD type and wire configuration (2-wire, 3-wire, 4-wire) are critical. Take a high-res photo of the old module’s jumper settings before removal. Incorrect wire configuration will cause significant temperature reading errors (up to 10°C+).
❗ Wiring Incompatibilities: This module has INTERNAL terminations. Do not confuse with external termination variants (133827-01). Verify your field wiring is routed directly to the front panel terminals, not to a separate terminal block.
❗ Non-Isolated Ground Loops: This is a NON-ISOLATED module. If your RTDs are grounded at multiple points, you WILL get ground loop noise causing erratic temperature readings. Verify single-point grounding before installation; upgrade to isolated variant (133835-01) if needed.
❗ ESD Dangers: The RTD input stage is extremely ESD-sensitive. A single static discharge can destroy the precision ADC circuitry. Always wear a grounded wrist strap connected to the rack chassis, not just the bench mat.
Replacement Procedure:
- Pre-install: Back up 3500/60 configuration; photograph jumpers; verify new unit revision and RTD type matches.
- Removal: Power down frame (3500/60 is NOT hot-swappable); wait 60s for capacitor discharge; disconnect field wires; remove module.
- Install: Set jumpers per photo; seat module firmly; reconnect field wires to internal terminals; torque to 0.5 Nm.
- Power-on Test: Apply power; verify OK LED; check 3500 Configuration Software for no faults; verify temperature readings against reference thermometer.
FAQ (Frequently Asked Questions)
Q: Can I hot-swap the Bently Nevada 133819-01?
A: No. The 3500/60 I/O module lacks hot-swap circuitry. Removing it under power will cause a backplane voltage disturbance, potentially corrupting the configuration of adjacent monitoring modules and risking arc damage to the backplane connector. Always perform a controlled frame shutdown.
Q: Why is my new module showing erratic temperature readings?
A: Check for ground loops first. This is a NON-ISOLATED module; if your RTDs are grounded at both the sensor and the panel, you’ll get noise. Also verify the RTD wire configuration (2/3/4-wire) matches your jumper settings. A 3-wire RTD configured as 2-wire will show significant offset errors.
Q: Is this module interchangeable with the 133827-01?
A: No. The 133819-01 has INTERNAL terminations (wires connect directly to the module). The 133827-01 requires EXTERNAL termination blocks. They are mechanically and electrically different. Verify your existing installation before ordering.
Q: What happens if I lose power to this module during operation?
A: You lose all temperature monitoring for that channel group. The 3500/60 requires continuous power to process RTD signals and drive alarms. There is no battery backup. Always ensure redundant power supply configuration per API 670 for critical temperature parameters.
Q: How do I verify if this is a genuine Bently Nevada 133819-01?
A: Check for the Bently Nevada logo etched (not printed) on the PCB; verify the serial number matches the label; inspect the front terminal block for factory-installed screws (replaced screws indicate refurbishment). Request the OEM certificate of conformity from the supplier; reputable vendors provide traceability to the original Bently Nevada shipment.
Q: Can I use thermocouples with this module?
A: Yes, but verify the jumper configuration. The 133819-01 supports both RTD and TC inputs, but you must set the jumpers for the correct sensor type. TC mode disables the RTD excitation current; RTD mode enables it. Incorrect setting will damage TC inputs or give false RTD readings.
Q: What’s the warranty on replacement units?
A: Standard warranty is 12 months from shipment date, covering manufacturing defects and DOA conditions. Warranty does not cover ESD damage, overvoltage from incorrect wiring, or physical damage from improper installation. Always retain the QC test report and original packaging for warranty claims.
