The Bently Nevada 1900/65 167669-01 is a high-performance, standalone General Purpose Equipment Monitor designed to provide continuous protection and monitoring for essential machinery. While large-scale turbomachinery often utilizes the 3500 series, the 1900/65 is engineered specifically for "balance-of-plant" assets such as pumps, fans, motors, and small compressors. It bridges the gap between simple transmitters and complex rack-based systems by offering four channels of vibration and two channels of temperature/process input in a compact, ruggedized form factor. By utilizing this monitor, facilities can prevent catastrophic mechanical failures, reduce unplanned downtime, and extend the lifecycle of critical industrial assets through real-time alarm triggering and relay outputs.
| Feature | Specification |
| Input Channels | 4 Vibration (Acceleration, Velocity, or Displacement) & 2 Temperature/Process (RTD, TC, or Voltage) |
| Signal Processing | Integrated ADC with configurable filters and integration |
| Relay Outputs | 6 Fully programmable relays (Dry contacts) |
| Analog Outputs | 4 to 20 mA (Configurable for any measured parameter) |
| Communication | Modbus TCP/RTU via 10/100 Base-T Ethernet or RS485 |
| Display Interface | Optional external display support for local visualization |
| Power Input | 18 to 36 Vdc (External power supply required) |
| Operating Temp | -20°C to +70°C (-4°F to +158°F) |
| Mounting | DIN rail or bulkhead mounting options |
The specific part number 167669-01 refers to the main circuit board assembly within the 1900/65 monitor. Understanding the model code is essential for ensuring hardware compatibility with your existing sensors:
1900/65: The Base Model Series (General Purpose Equipment Monitor).
-01 (Ordering Option): Typically designates the power option. The "-01" variant is configured for 18 to 36 Vdc input, which is the standard for most industrial control panels.
-00 (Display Option): Indicates the unit is provided without an integrated front panel display, intended for remote monitoring or DIN-rail installation where a local screen is not required.
167669-01: This is the specific Spare Processor and I/O Module part number. It encompasses the internal electronics that handle signal conditioning, alarm logic, and communications.
To ensure signal integrity and avoid EMI (Electromagnetic Interference), follow these professional installation guidelines:
Enclosure Selection: Always house the 1900/65 in a NEMA 4 or IP65-rated enclosure if installing in a wash-down or high-dust environment.
Grounding: Ensure the DIN rail or mounting plate is common to the system earth. Shielded cables for transducers (vibration/RTD) should be grounded at the monitor end only to prevent ground loops.
Vibration Inputs: Connect 3-wire accelerometers or proximity probes to the buffered output terminals for easy field troubleshooting without disconnecting the monitor.
Relay Logic: Configure the relays in a "Normally Energized" state for fail-safe operation, ensuring that a loss of power to the monitor triggers an alarm downstream.
Q: Can the 1900/65 167669-01 be used with 3500 series Proximitor sensors?
A: Yes. The 1900/65 is fully compatible with Bently Nevada 3300 XL series Proximitors and transducers, as well as standard IEPE accelerometers.
Q: Does this module support Modbus communication for PLC integration?
A: Absolutely. It supports both Modbus RTU (Serial) and Modbus TCP (Ethernet) protocols, allowing seamless integration into Allen-Bradley, Siemens, or Honeywell control systems.
Q: Is the 167669-01 hot-swappable?
A: While the module is robust, it is recommended to remove power before replacing the internal 167669-01 assembly to protect the sensitive I/O circuitry from transients.
