Bently Nevada 3500/33-01-01 16-Channel Relay Module

Product Specification

3500/33-01-01 Relay Module

Brand Name:Bently Nevada

Product Name:3500/33-01-01

Warranty:1Year

Key Parameters 

Core Features & Advantages

• Flexible and Programmable Logic: Each of the 16 relays can be independently programmed via software using AND/OR logic. Input sources can include Alert/Danger statuses, "Not-OK" conditions, or measured variables from any monitor channel, enabling complex voting logic (e.g., 2-out-of-3) for tailored machine protection strategies.

• Configurable Fail-Safe Operation: The module supports both failsafe (Normally Energized, NE) and non-failsafe (Normally De-energized, ND) modes, configurable in groups of four channels. This is critical for Safety Instrumented Systems (SIS), where a loss of power should result in a safe shutdown action.

• Robust Industrial Design: Featuring epoxy-sealed relays and an integrated arc suppression circuit (250 Vrms), the module is built to withstand harsh industrial environments and vibration, ensuring long-term contact stability and reliability.

• Comprehensive Diagnostics: Front-panel LEDs provide clear visual status for power (OK), communication (TX/RX), and individual channel alarms, enabling rapid on-site troubleshooting.

Typical Applications

The 3500/33 is a critical component for executing protection logic in critical rotating machinery across heavy industries:

• Turbomachinery Protection: Triggering emergency shutdown logic for steam and gas turbines when vibration or speed exceeds safe limits.

• Compressor Control: Executing automated shutdowns or alarms for large centrifugal compressors in oil and gas applications.

• Safety System Integration: Acting as the final output element in emergency shutdown (ESD) systems, driving physical lockouts or alerting operators through hardwired connections.

Frequently Asked Questions (FAQ)

Q1: What is the primary function of the 3500/33-01-01?
A: It is a 16-channel relay output module for the 3500 Machinery Protection System. Its role is to convert alarm and status signals from monitor modules into physical relay contact outputs to trigger alarms, shutdown sequences, or control external equipment.

Q2: What communication protocols does the module support?
A: The module communicates with other 3500 modules via the rack backplane. It is configured using the 3500 Rack Configuration Software (version 3.3 or higher) and integrates with System 1 software for advanced diagnostics.

Q3: Is the 3500/33-01-01 hot-swappable?
A: The search results do not explicitly confirm hot-swap capability for this module. It is recommended to consult the 3500 system manual or contact Bently Nevada for specific maintenance procedures.

Q4: What is the difference between the 3500/33-01-01 and other 3500/33 variants?
A: The -01-01 suffix indicates a standard configuration with an internal termination I/O module (149992-01). Other variants may have different I/O termination types or agency approvals.

Q5: Can I use this module for low-current signals like PLC inputs?
A: The standard 3500/33-01-01 is designed for general purpose loads. For low-current signals (e.g., PLC inputs), the specific Low Current Relay Output Module (PN: 149992-03) should be ordered as a spare part.

Q6: What are the key troubleshooting steps if a relay fails to operate?
A: Check the front-panel CH Alarm LED for that channel to verify the module is receiving the correct alarm signal. Verify the relay configuration in the 3500 Rack Configuration Software. Check the field wiring to the Common, Normally Open (NO), and Normally Closed (NC) terminals. If the LED indicates a command but the contact does not switch, the relay may have failed.

Q7: What software version is required for configuration?
A: The module requires 3500 Rack Configuration Software version 3.3 or higher and 3500 Data Display Software version 1.40 or higher.

Recommended Models & Related Products

The 3500/33-01-01 is part of the Bently Nevada 3500 series. Below are key related models and compatible components:

Choosing the Right Model

• For standard relay output applications: The 3500/33-01-01 provides 16 channels with internal termination for general purpose loads.

• For low-current signal applications: Select the 149992-03 Low Current Relay Output Module for driving PLC inputs or other low-power devices.

• For complete machinery protection systems: Pair the relay module with 3500/40M or 3500/42M vibration monitors and 3500/22M TDI for comprehensive protection and diagnostics.