Description

Product Overview

The Bently Nevada 3500/33 (162291-01) is a rack-mounted relay interface module engineered for the 3500 Machinery Protection System. It provides 16 independent relay channels designed for configurable alarm execution, voting logic processing, and machine protection interlocks based on monitored condition data.

The module is installed within the 3500 rack chassis, occupying full-height slots positioned to the right of the Transient Data Interface (TDI). It is commonly used for implementing shutdown logic, alarm annunciation, and protective system integration in rotating equipment environments.

Electrical & Relay Performance

• Total Outputs: 16 independent relay channels

• Relay Configuration: SPDT (Form C contacts)

• Channel Grouping: 4 groups of 4 channels, configurable as NE or ND

• Switching Capability: Supports low-level and power-level switching depending on system design

• Minimum Switching Load: 100 mA @ 5 VDC

DC Load Ratings

• Maximum Current: 5 A

• Maximum Voltage: 125 VDC (standard systems) / 30 VDC (failsafe configurations)

• Maximum Power:

• 70 W @ 24 VDC

• 10 W @ 48 VDC

• 9 W @ 60 VDC

AC Load Ratings

• Maximum Current: 5 A

• Maximum Voltage: 250 VAC

• Maximum Power: 1200 VA

Low-Level Contact Capability

• Minimum load: 1 mA @ 1 VDC (gold-contact compatible operation)

Control Logic & Functional Behavior

• Fully programmable Alarm Drive Logic per channel

• Supports Boolean logic structures (AND / OR)

• Accepts multiple input sources:

• Alert status signals

• Danger alarm conditions

• Not-OK system status

• Measured variables from any rack monitor channel

• Enables voting logic configuration for redundant protection schemes

• Supports independent channel logic assignment across all 16 outputs

Power & Reliability

• Typical Power Consumption: 5.8 W

• Relay Contact Life:

• Standard: ~10,000 mechanical/electrical cycles

• Extended variants: up to 100,000 cycles (depending on configuration and load conditions)

• Arc Suppression: Integrated 250 Vrms suppression network

• Relay Construction: Epoxy-sealed for environmental resistance and vibration tolerance

Environmental Ratings

• Operating Temperature: –30°C to +65°C

• Storage Temperature: –40°C to +85°C

• Relative Humidity: up to 95% non-condensing

• Designed for continuous duty in machinery protection environments

Mechanical Data

Main Module

• Dimensions: 241 × 24.4 × 242 mm

• Weight: 0.7 kg

I/O Module

• Dimensions: 241 × 24.4 × 99.1 mm

• Weight: 0.4 kg

Rack Installation

• Front slot: 1 full-height position

• Rear slot: 1 full-height I/O position

• Placement: Right side of TDI module within 3500 rack architecture

Application Areas

• Turbine and compressor protection systems

• Pump and motor condition monitoring shutdown logic

• Industrial alarm annunciation systems

• Process interlock and safety logic execution

• Rotating machinery vibration protection platforms

FAQ

Q1: Can each relay operate independently?
Yes, all 16 relay outputs are individually configurable with dedicated alarm logic.

Q2: Does the module support redundant protection logic?
Yes, it supports voting logic and multi-input Boolean alarm structures for redundancy strategies.

Q3: What is the installation position in the rack?
It installs to the right of the TDI module using one full-height front and rear slot pair.

Specifications

• Brand: Bently Nevada

Advantages

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