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3500/33
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3500/33

Bently Nevada 3500/33 16-Channel Relay Module

  • Model: 350033
  • Brand: Bently Nevada
  • Series: 3500
  • Core Function: Provides relay outputs for alarms
  • Product Type: 16-Channel Relay Module
  • Key Specs: 16 independent relays, full-height module, alarm drive logic
  • Condition: New Original / New Surplus
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Description

3. Key Technical Specifications

  • Module Type: 16-Channel Relay Module
  • Relay Count: 16 independent relays
  • Contact Type: Form-C (SPDT) relays
  • Logic: Individual Alarm Drive Logic per relay
  • Rack Size: Full-height module
  • Power Consumption: Approx. 5.8 watts
  • Operating Temperature: -30°C to +65°C
  • Status LEDs: Front panel for relay and module status
  • I/O: Rear terminal connections for field wiring
  • Compatibility: Works with 3500 monitors for shutdown and annunciation

4. Product Introduction

The Bently Nevada 350033 is the 3500/33 16-Channel Relay Module. It is a full-height module that supplies 16 relay outputs with programmable alarm drive logic for the 3500 Machinery Protection System.

It translates monitor alarm conditions into hard-wired relay contacts for tripping shutdown systems, starting standby equipment, or activating annunciators. Each relay operates independently based on configured logic.

5. Troubleshooting Quick Reference

Symptom Possible Cause Relevance to this Part Quick Check Method Recommendation
Relay not energizing Logic or wiring issue ✅ High Check front panel LEDs and measure contacts Verify alarm logic in configuration software
Stuck relay Mechanical failure ✅ High Test manual operation and coil voltage Replace module if contacts fail continuity test
Multiple relays false trip Configuration error ✅ Medium Review alarm voting and setpoints Download and inspect current logic
No module status Backplane connection ✅ Medium Check power and seating Reseat module in rack
Intermittent operation Loose field wiring ❌ Medium Torque check on rear terminals Inspect and secure all wiring

Document relay states, software logic, and multimeter readings when contacting support.

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6. Frequently Asked Questions (FAQ)

How many relays does the 350033 provide? Sixteen independent Form-C relays. Each can be programmed with its own alarm drive logic from the connected monitors.

Can I use this for safety shutdowns? Yes. Many plants wire these relays into ESD or trip circuits. Always verify logic and perform functional testing after configuration changes.

Is the module hot-swappable? No. Changing relay modules typically requires a controlled shutdown or careful management of affected circuits. Plan accordingly.

What contact ratings do the relays have? Standard industrial ratings suitable for most annunciator and trip applications. Check the datasheet for exact voltage/current limits.

Do I need special configuration for this module? Yes. Use the 3500 System Configuration Software to assign alarm logic to each relay channel. Logic can combine multiple monitor alarms.

How do you test these relay modules? We verify each relay operates correctly under software control, check contact resistance, and confirm isolation in a test rack setup.

Why keep spare 350033 modules? Relay modules take the wear from frequent switching and field wiring changes. Having a tested spare reduces downtime when a relay fails or logic needs expansion.

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