Bently Nevada 81546-01 Transducer (XDCR) I/O and Record Terminal Module

Product Summary

The Bently Nevada 81546-01 is a Transducer (XDCR) I/O and Record Terminal Module featuring Dual Hermetic Relays. It operates as the specialized rear-mounted I/O termination component within the modular 3300 Series Monitoring System, serving companion modules such as the 3300/20, 3300/25, 3300/45, and 3300/48 (Assembly 79748-01 variant) to route sensor inputs, diagnostic signals, and automatic shutdown commands.

Core Specifications

• Model Number: 81546-01
• Product Type: XDCR I/O and Record Terminal Module with Dual Hermetic Relays
• System Compatibility: Bently Nevada 3300 Series Monitoring Chassis
• Associated Main Modules: 3300/20 (Dual Shaft Vibration), 3300/25 (Dual Thrust Position), 3300/45, and 3300/48
• Relay Configuration: Dual hermetically sealed electro-mechanical alarm relays
• Supported Signal Inputs: Proximity transducers, seismic sensors, temperature, and overspeed pulse streams

Functional Features

• Signal Distribution & Routing: Securely interfaces field wiring from machinery-mounted transducers to the backplane of the 3300 instrumentation rack.
• Recorder Outputs: Provides dedicated, user-programmable analog recorder outputs (+4 to +20 mA, 0 to -10 VDC, or +1 to +5 VDC) proportional to full-scale monitoring values for external data logging.
• Hermetic Seal Protection: Relays are hermetically sealed to prevent environmental contaminants and corrosive gases from degrading contact points, ensuring high trip reliability.
• Buffered Transducer Terminals: Supplies rear-panel terminal connections for raw, unisolated sensor signals alongside front-panel buffered coaxial ports.

Installation & Physical Limits

• Physical Dimensions: 22.9 cm x 5.1 cm x 10.2 cm (9.0 in x 2.0 in x 4.0 in)
• Module Weight: 0.4 kg (14.1 oz / 0.86 lbs)
• Mounting Configuration: Installs directly onto the rear terminal chassis backplane, corresponding precisely to the front-slotted monitor module.
• Operating Temperature Range: 0°C to +65°C (+32°F to +150°F)
• Storage Temperature Range: -40°C to +85°C (-40°F to +185°F)
• Relative Humidity: Up to 95%, non-condensing