Bently Nevada 1900/65A-01-01-04-CN-00 General Purpose Equipment Monitor

Product Overview

The 1900/65A-01-01-04-CN-00 is a versatile, stand-alone machinery protection system designed for continuous monitoring and protection of "general-purpose" assets. Unlike larger rack-based systems, this 1900/65A-01-01-04-CN-00 unit provides a compact solution for essential machinery such as small pumps, motors, blowers, and fans in industries like wastewater treatment, food and beverage, and power generation. It supports four vibration inputs and four temperature inputs, offering critical real-time alerts and automatic shutdown capabilities via internal relays. By providing high-tier monitoring for non-critical yet essential equipment, it allows plant operators to identify mechanical imbalances and bearing wear early, preventing small issues from escalating into major system failures and effectively eliminating the high costs of unplanned operational downtime.

Suffix Breakdown

The model code 1900/65A-01-01-04-CN-00 reflects a specific configuration tailored for integration and regional compliance:

• 01 (Power Option): Configured for universal AC power, accepting 110 to 220 VAC at 50 to 60 Hz, ensuring compatibility with standard global power grids.

• 01 (Display Option): Includes a factory-attached display module with no external cabling required, allowing for immediate local visualization of machinery status.

• 04 (Mounting Option): Features the 1900/55 replacement kit, specifically designed to allow seamless mechanical and electrical upgrades for older 1900/55 installations.

• CN (Agency Approval): Provides comprehensive hazardous area certifications, including ATEX, IECEx, and the mandatory Chinese NEPSI marking for compliance in regulated industrial zones.

• 00 (Communications Option): Standard configuration without additional digital communication protocols (Modbus or Ethernet), focusing on hardwired relay and analog outputs.

Technical Specifications

Technical FAQs

Can this monitor be used to replace an existing 1900/55 unit?

Yes. This specific configuration (Option 04) includes a specialized mounting kit designed to fit the footprint of the legacy 1900/55 monitor. This minimizes the need for panel modifications and simplifies the wiring transition during a system upgrade.

What types of sensors can be connected to the vibration inputs?

The 1900/65A is highly flexible. It supports proximity probes (such as the 3300 XL series), accelerometers, and Velomitor sensors. Each channel can be independently configured via the software to match the specific transducer type and measurement units required.

Is the display visible in outdoor environments?

The attached display (Option 01) is designed for industrial visibility. However, if the unit is installed in direct sunlight, we recommend using a sunshade or an external enclosure to protect the screen and ensure long-term readability of the monitored values.

Engineering & Installation Guide

Retrofit and Mounting Procedure

When utilizing the 1900/55 replacement kit (Option 04), ensure that the existing cutout is clean and free of burrs. The kit is designed to provide a secure seal against the panel. For new installations, ensure the monitor is mounted at eye level to take full advantage of the attached display. Always maintain a minimum clearance around the unit to allow for heat dissipation and easy access to the terminal blocks.

Wiring for NEPSI/Hazardous Compliance

Since this unit carries the -CN NEPSI approval, all field wiring must adhere to the GB 3836 explosion-proof standards for the Chinese market. When connecting sensors located in hazardous zones, the use of appropriate galvanic isolators or Zener barriers is mandatory to maintain the integrity of the intrinsically safe loop. Ensure that the monitor's ground terminal is connected to a dedicated, low-impedance instrument ground.

Relay Voting and Safety Logic

The 1900/65A features six internal relays that can be programmed for sophisticated voting logic (e.g., 2-out-of-2). For machine-trip applications, we strongly recommend configuring the relays as "Normally Energized" (fail-safe). In this mode, the relay will drop out and trigger a trip if the monitor loses power or if a system fault (Not-OK) occurs, providing an additional layer of asset protection.