Description

Product Overview

The Bently Nevada 3500/33 16-Channel Relay Module is a full-height rack-mounted output module designed for integration within the Bently Nevada 3500 machinery protection system. It provides 16 independently configurable relay outputs used for alarm, shutdown, and control logic execution based on monitored machine condition data.

The module installs in the rear of the 3500 rack system, positioned to the right of the Transient Data Interface (TDI) module. Multiple relay modules can be deployed within a single rack configuration depending on system design requirements.

Key Technical Specifications

Relay Output Characteristics

• Total Channels: 16 independent relay outputs

• Relay Type: SPDT (Single-Pole Double-Throw)

• Contact Configuration: Form C

• Switching Groups: 4 groups of 4 channels (selectable ND/NE operation)

• Relay Contact Life: ~10,000 switching cycles (typical load conditions)

• Arc Suppression: 250 Vrms integrated suppression circuitry

• Sealing: Epoxy-sealed relay construction for vibration resistance

Power & Consumption

• Typical Power Consumption: 5.8 W

• Low thermal load suitable for dense rack installations

Control & Logic Functions

• Fully programmable Alarm Drive Logic

• Supports AND / OR logic combinations

• Input sources include:

• Alert and Danger alarm states

• Not-OK system status

• Individual or grouped measured variables from rack channels

• Supports voting logic configuration per relay output

Front Panel Indicators

• OK LED: Indicates normal module operation status

• TX/RX LED: Communication activity within 3500 rack backplane

• Channel Alarm LED: Indicates active relay alarm state

Physical & Installation Data

• Main Module Dimensions: 241 × 24.4 × 242 mm

• I/O Module Dimensions: 241 × 24.4 × 99.1 mm

• Main Module Weight: 0.7 kg

• I/O Module Weight: 0.4 kg

• Rack Requirement:

• 1 full-height front slot (main module)

• 1 full-height rear slot (I/O module)

Environmental & Reliability

• Industrial-grade epoxy sealed relay design

• High resistance to vibration and electrical noise

• Designed for continuous operation in machinery monitoring environments

• Relay arc suppression enhances long-term contact stability

Typical Applications

• Turbomachinery protection systems

• Compressor and pump monitoring racks

• Vibration and condition monitoring alarm execution

• Plant-wide safety shutdown logic integration

• Power generation and process industry protection systems

FAQ

Q1: Can each relay be independently configured?
Yes. Each of the 16 relay outputs can be individually programmed using alarm drive logic and voting configurations.

Q2: Does the module support redundant logic conditions?
Yes. The module supports voting logic and multi-input AND/OR conditions for redundancy and fault tolerance.

Q3: Where is the module installed in the rack?
It is installed to the right side of the TDI module, occupying both front and rear full-height slots.

Specifications

• Brand: Bently Nevada

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems