The Bently Nevada 1900/65 (Part Number 167707-01) is a self-contained, high-performance monitor designed for continuous monitoring and protection of essential machinery. While large critical turbines often require the 3500 Series, the 1900/65 provides a cost-effective yet rugged solution for pumps, fans, motors, and blowers. By integrating vibration, position, and temperature monitoring into a single compact unit, it prevents catastrophic mechanical failures and reduces unscheduled downtime in demanding industrial environments.
The 1900/65 is engineered for versatility, supporting a wide range of transducer inputs and providing flexible relay logic.
| Feature | Specification |
| Input Channels | 4 Vibration/Position Channels, 4 Temperature Channels |
| Input Types | Proximitor* sensors, Accelerometers, Velomitors*, or RTD/TC |
| Output Signals | 4 to 20 mA (for PLC/DCS integration) |
| Relay Outputs | 6 Programmable Relays (Alert and Danger) |
| Communication | Modbus® RTU via RS485 |
| Operating Temp | -20°C to +70°C (-4°F to +158°F) |
| Power Requirement | 18 to 36 Vdc, 6 watts maximum |
| Display | Built-in LCD for real-time value viewing |
To ensure your hardware matches your specific field requirements, refer to the breakdown of the ordering options for the 1900/65 series:
1900/65: Base General Purpose Monitor.
Option AA (Power Option):
01: 18 to 36 Vdc (Standard DC power supply).
02: 110/220 Vac (External power supply included).
Option BB (Approvals Option):
00: None (General Purpose).
01: CSA/NRTL/C (Class 1, Div 2).
02: ATEX/IECEx/CSA (Zone 2).
Note on 167707-01: This specific part number refers to the main circuit board assembly within the monitor housing, often required for maintenance or component replacement.
Proper installation is critical to avoid electromagnetic interference (EMI) and ensure signal integrity:
Mounting: The 1900/65 is designed for DIN rail mounting (35mm) or bulkhead mounting. Ensure adequate clearance for cooling and cable routing.
Sensor Wiring: Use shielded twisted-pair cables for all transducer inputs. Shields should be grounded at the monitor end only to prevent ground loops.
Power Connection: For the 167707-01 (DC version), connect 24Vdc to the designated terminals. Verify polarity before energizing.
Relay Logic: Configure your "Normally Open" (NO) or "Normally Closed" (NC) relay states via the 1900 Configuration Software to ensure "fail-safe" operation for your specific site standards.
Q: Can I use the 1900/65 without a PC connected?
A: Yes. While configuration requires a PC and the 1900 Configuration Software, once the parameters are loaded, the monitor operates as a standalone protection device.
Q: Does the 167707-01 support Modbus communication?
A: Yes, it includes an RS485 port supporting Modbus RTU, allowing you to stream vibration and temperature data directly to a HMI or SCADA system.
Q: Is the 1900/65 a replacement for the 3500 series?
A: No. It is intended for "General Purpose" equipment. For high-speed turbomachinery requiring API 670 compliance, the 3500 series remains the industry standard.
