Product Brief: Bently Nevada 1900/65A General Purpose Equipment Monitor (1900/65A-01-01-00-00-00)
The 1900/65A General Purpose Equipment Monitor is a compact, standalone continuous monitoring device designed for non-critical or general purpose machinery (pumps, fans, blowers, small compressors, motors). The configuration 1900/65A-01-01-00-00-00 represents the base unit with 4 dynamic inputs (for accelerometers or proximity probes), 4 temperature inputs (RTD/TC), and no optional communication cards (basic relay outputs only). It is an economical alternative to full 3500 series systems for lower criticality assets.
Key Features
4 dynamic signal inputs – Accepts accelerometers (IEPE), velocity transducers, or eddy current proximity probes.
4 temperature inputs – Accepts RTD (Pt100) or thermocouple (J, K, T) sensors.
2 programmable relay outputs for alarm/trip (SPDT, 250 VAC / 30 VDC, 5A rated).
Integrated 1/4 VGA color display for local status and data viewing.
USB port for configuration and data export.
Modbus/Muted RS-485 serial communication (standard on base unit).
Peak hold, trending, and alarm history logging.
24 VDC power input (standard).
Configurable via 1900 Configuration Software (free download).
Parameters (Table)
| Parameter | Specification |
|---|---|
| Model | 1900/65A |
| Full Configuration Code | 1900/65A-01-01-00-00-00 |
| Configuration Meaning | 01 = Basic relays (2), 01 = 24 VDC power, 00 = No additional communication, 00 = No special options, 00 = Standard firmware |
| Product Type | General purpose equipment monitor |
| Dimensions (Height x Width x Depth) | 144 mm x 144 mm x 54 mm (5.67 in x 5.67 in x 2.13 in) – 1/4 DIN panel mount |
| Weight (approx.) | 0.7 kg (1.54 lb) |
| Enclosure Rating | Front panel: IP65 / NEMA 4X (dust-tight, water-resistant). Rear: IP20 |
| Power Supply | 24 VDC nominal (18–32 VDC), 10 W max |
| Dynamic Inputs | 4 channels, IEPE accelerometer (2–20 mA constant current) / velocity / proximity probe (±5 to ±24 VDC input) |
| Temperature Inputs | 4 channels, RTD (Pt100, 2-/3-/4-wire) or TC (J, K, T) |
| Relay Outputs | 2 x SPDT, 5A @ 250 VAC / 30 VDC (resistive load) |
| Communication Ports | RS-485 (Modbus RTU, master or slave), USB 2.0 Type B (configuration & data) |
| Display | 3.5 inch (89 mm) 1/4 VGA color TFT, 320 x 240 pixels |
| Data Storage | Internal memory for trend logs (up to 1 year at 1 hour interval) and 50 alarm events |
| Measurement accuracy | ±2% of full scale (dynamic channels), ±1°C (RTD/TC typical) |
| Operating Temperature | -20°C to +60°C (-4°F to +140°F) |
| Storage Temperature | -30°C to +80°C (-22°F to +176°F) |
| Humidity | 0 to 95% non-condensing |
| Vibration limit | 2 g RMS (operating) |
| Mounting | Panel cutout 138 mm x 138 mm (5.43 in x 5.43 in) – 1/4 DIN standard |
Application Scenarios (use cases)
| Application Area | Description |
|---|---|
| Cooling Water Pumps | Continuous monitoring of pump bearing vibration (accelerometer) and bearing temperature (RTD) for early wear detection. |
| HVAC Fans & Blowers | Monitors fan bearing vibration and motor winding temperature; provides local alarming and relay trip to VFD/PLC. |
| Small Compressors (Reciprocating/Screw) | Detects high vibration and discharge temperature for preventive maintenance. |
| Electric Motors (up to 1,000 HP) | Bearing vibration (velocity or accelerometer) plus winding temperature (RTD) for general industrial motors. |
| Process Plant Agitators/Mixers | Monitors gearbox vibration and bearing temperature in chemical or mining applications. |
| Conveyor Belt Drive Pulleys | Protects idler bearings and drive motor with local alarms, no central DCS required. |
| Cooling Tower Fans | Remote monitoring of gearbox vibration and oil temperature via RS-485 / Modbus to plant SCADA. |
| Small Hydro Turbine (auxiliary units) | Low-cost protection for lub oil pumps, cooling fans, and gate drive motors. |
Notes
No 4–20 mA outputs on this base configuration (optional communication cards available for analog outputs or Ethernet).
Configuration software (free) required for initial setup: sensor type, alarm setpoints, measurement units, relay logic.
Can operate standalone without any PLC/DCS – relays directly stop/trip the machine upon alarm.
For hazardous area installations, an external safety barrier (e.g., intrinsically safe isolator) is required – the 1900/65A itself is not rated for Zone 0/1.
The 1900/65A replaces the older 1900/65 and offers improved display and Modbus performance.
Global direct procurement guarantee
All products are purchased directly from overseas original manufacturers or authorized channels, 100% guaranteed genuine quality, sufficient spot inventory, and comprehensive model coverage
Quality Commitment
Each product has been tested by our technicians, providing 12-month long warranty, worry-free after-sales
Flexible procurement plan
- Bulk order enjoys Friendship discount (2 pieces or more can be applied)
- Long-term cooperative customers can apply for priority supply
Full service support
7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
Why do so many customers choose us?
On the basis of the same quality, we provide:
- More competitive price system
- Faster logistics response
- More complete technical support (free product technical documentation)
Your trust is the driving force for our continuous progress, submit your requirements immediately to get exclusive quotes
