Description
Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.
Product Introduction
When your industrial site needs a cost-effective independent continuous monitoring unit for auxiliary rotating machinery, without deploying a large rack-based 3500 series system, this module acts as the core machinery protection hub.
It is a highly versatile standalone equipment monitor engineered for continuous mechanical protection, supporting 2/3-wire accelerometers, velocity sensors and proximity sensors. It integrates 4 vibration input channels, 4 temperature input channels, 6 independent relay alarm outputs and 4 4-20mA analog output channels, with a vibration measurement accuracy of ±1.0% full scale, and a measurement frequency range covering 10Hz~10kHz. It supports direct Modbus protocol integration with DCS/SCADA/PLC systems, and its compact DIN rail mounting design can be directly installed in the field control cabinet, making it a core replacement part for Bently Nevada auxiliary rotating machinery monitoring system maintenance and retrofit projects.
1900/65A
1900/65A
1900/65A
1900/65A
1900/65A
Key Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 1900/65A |
| Product Type | General Purpose Equipment Monitor |
| Manufacturer | Bently Nevada (Baker Hughes/GE) |
| Country of Origin | USA |
| Total Vibration Input Channels | 4 channels |
| Total Temperature Input Channels | 4 channels |
| Total Relay Output Channels | 6 channels |
| Total 4-20mA Analog Output Channels | 4 channels |
| Supported Sensor Types | 2/3-wire accelerometers, velocity sensors, 8mm proximity probes |
| Vibration Measurement Accuracy | ±1.0% full scale |
| Displacement Sensitivity | 7.87 mV/μm |
| Measurement Frequency Range | 10 Hz ~ 10 kHz |
| Working Voltage Range | 18–36 V DC (typical 24 V DC) |
| Operating Temperature Range | -20°C ~ +65°C |
| Installation Method | Standard DIN rail mounting |
| Dimensions | 196.9 mm × 149.4 mm × 74.4 mm (H × W × D) |
| Net Weight | ~0.77 kg |
| Communication Protocol | Modbus RTU |
| Compatible Systems | Bently Nevada 1900 Series machinery protection systems |
| Warranty | 12 months from delivery |
Field Application & Technical Pitfalls
Critical Industrial Scenarios
- **Large Petrochemical Plant Auxiliary Pump Set Condition Monitoring: Acts as the core independent monitoring unit for petrochemical plant water pumps, oil pumps and other auxiliary equipment, realizing real-time vibration and temperature monitoring, ensuring the long-term stable operation of auxiliary rotating machinery.
- **Thermal Power Plant Fan and Motor Protection System: Delivers reliable cost-effective monitoring performance for power plant induced draft fans, forced draft fans and large motors, adapting to high-temperature and high-dust industrial environments, meeting the continuous operation requirements of power generation auxiliary equipment.
- **Metallurgical Factory Conveyor Drive Motor Monitoring: Adapts to high-vibration metallurgical workshop environments, providing stable condition monitoring and alarm output support for the drive motors of large material conveyor systems.
Non-Negotiable Technical Pitfalls
- ⚠️ Bold Warning 1: Never arbitrarily use non-matching non-Bently standard proximity probes for signal collection. The third measurement channel will experience signal deviation that causes the vibration measurement to exceed the safety threshold.
- ⚠️ Bold Warning 2: Skipping the pre-commissioning full channel calibration test will leave you with hidden measurement failure risks. This module must confirm all vibration and temperature measurement channels’ accuracy fully meet Bently machinery protection specifications before putting into operation.
- ⚠️ Bold Warning 3: Do not arbitrarily set the alarm threshold beyond the equipment safety operation range. The third protection channel will fail to trigger the alarm in time, resulting in hidden equipment damage risks.
A large petrochemical plant maintenance team once swapped a Bently Nevada 1900/65A module and skipped the full channel calibration test. The hidden single vibration channel measurement deviation exceeded 10%, causing the pump bearing wear fault to not be detected in time, resulting in a 1.5-hour partial shutdown of the production unit.
Quality Control (QC) SOP & Transparency
- Inbound Verification: Cross-check the OEM serial number against Bently Nevada’s official 1900 series part registry, confirm the part number 1900/65A matches the factory label, and inspect no bent pins or corrosion on all sensor and communication connectors.
- Live Rig Testing: Power the unit in a calibrated Bently Nevada monitoring system test bench, simulate standard vibration and temperature reference signals, and confirm full 2-hour continuous stable monitoring operation.
- Parameter Testing: Verify all 4 vibration and 4 temperature input channels operate correctly, confirm all 6 relay outputs and 4 analog outputs’ functions meet factory specifications, and validate all status LED indicators and Modbus communication functions work properly.
- Final QA & Packaging: Seal the tested module in a static-shielding anti-static bag, attach a unique QC passed serial label, and nest it in foam padding inside a rigid industrial shipping carton.
Frequently Asked Questions (FAQ)
- Can I hot-swap this module while the monitoring system is running? No. You must first confirm that the corresponding monitored equipment is in a safe state and the alarm interlock function is temporarily blocked before removing the unit, otherwise you will trigger unexpected monitoring data loss risks.
- What exact systems is this module compatible with? It works natively with Bently Nevada 1900 series machinery protection systems, and cannot be directly used in non-Bently 3500 series rack systems without custom adaptation.
- How long is the standard warranty for this new surplus unit? 12 months from delivery. It covers all manufacturing defects, but does not extend to units damaged by miswiring, improper sensor matching, or overvoltage in the field.
- How do I tell a genuine OEM unit apart from a refurbished clone? Genuine Bently Nevada 1900/65A modules have a laser-etched part number on the PCB, not a printed sticker. Clone units almost always fail the full 8-channel measurement accuracy test.
- What is the typical lead time for shipment? In-stock units ship within 48 hours. If you require official Bently Nevada factory machinery protection performance test documentation, add 2 extra business days to the turnaround window.
- Can this module replace the older 1900 series legacy monitor unit? Well, technically it fits the same standard DIN rail installation footprint, but you must confirm the Modbus communication parameter configuration fully matches the upper DCS/PLC system before replacement to ensure 100% system compatibility.
