Bently Nevada 1900/55 Vibration Monitor | Genuine & In Stock

Bently Nevada 1900/55 Fan and General Purpose Equipment Monitor

The Bently Nevada 1900/55 (Vibration Monitor) is a self-contained, high-performance machinery protection system designed specifically for continuous monitoring and protection of non-critical and general-purpose machinery. It solves the challenge of providing cost-effective, high-reliability protection for assets like cooling tower fans, pumps, and small motors that do not justify a full 3500 rack system. By providing four channels of vibration and two channels of temperature/process variable inputs, the 1900/55 (Bently Nevada) ensures that your essential assets are protected against catastrophic failure through early detection of mechanical imbalances, bearing wear, or thermal overload.

Technical Specifications

The 1900/55 (Part Number: 1900/55) is built to rigorous industrial standards to provide accurate real-time data:

Model Code Decomposition

The Bently Nevada 1900/55 ordering string defines the internal configuration and enclosure type. Below is the breakdown of the 1900/55 (Model: 1900/55) standard code:

1900/55-AA-BB-CC

• AA (Order Option): Defines the Power Supply and Input/Output configuration.

• Example: 01 – Standard configuration with 4-20mA and Relays.

• BB (Enclosure Option): Specifies the mounting hardware and physical protection.

• 00: No enclosure (Internal components for panel mounting).

• 01: NEMA 4X Weatherproof Enclosure (Fiberglass).

• 02: NEMA 4X Weatherproof Enclosure (Stainless Steel).

• CC (Approvals):

• 00: No special approvals required.

• 01: CSA/NRTL/C (Class 1, Div 2).

• 02: ATEX/IECEx (Zone 2).

Installation and Wiring Guidelines

Correct installation of the 1900/55 (Bently Nevada) is vital for signal integrity. As an MCM expert, I recommend the following:

1. Mounting: If using the open-frame version, ensure it is mounted inside a clean, dry cabinet. If using the 1900/55-01 (Fiberglass) or -02 (Stainless) enclosure, ensure all cable glands are properly sealed to maintain the NEMA 4X rating.

2. Transducer Connection: Connect vibration sensors (Accelerometers or Velomitors) using twisted-pair shielded cables. Ensure the shield is grounded only at the 1900/55 (1900/55) terminal block to prevent ground loops.

3. Relay Logic: Configure your "Danger" relays for "Normally De-energized" (Non-Failsafe) or "Normally Energized" (Failsafe) based on your plant's safety logic. The 1900/55 (Bently Nevada) allows for complex AND/OR voting logic across channels.

4. Signal Output: Connect the 4-20mA outputs to your PLC or DCS for trending, while the onboard relays handle local hardware trips for immediate protection.

FAQ: Machinery Protection and Compatibility

Q: Can the 1900/55 be used as a standalone controller?

A: Yes. The 1900/55 (1900/55) is designed to operate without an external computer once configured. It manages all monitoring, alarm logic, and relay outputs independently.

Q: Does it support Modbus communication for SCADA?

A: Yes, the 1900/55 (Bently Nevada) supports Modbus RTU over RS485 as standard, allowing you to pull all vibration levels and relay statuses into your plant's SCADA or DCS system.

Q: Can I mix different types of vibration sensors on the same monitor?

A: Yes. Each of the four vibration channels on the 1900/55 (1900/55) is independently configurable. You can monitor an accelerometer on Channel 1 and a proximity probe on Channel 2, provided they are configured correctly in the software.