Bently Nevada 3500/33-01-0116 Channel Relay Module

Description

3. Key Technical Specifications

• Model Number: 3500/33-01-01
• Manufacturer: Bently Nevada (Baker Hughes)
• Product Type: 16-Channel Relay Output Module
• System Platform: 3500 Machinery Protection System
• Main Relay Module: 149986-01
• Relay Output Module: 149992-01
• Relay Channels: 16 independent programmable outputs
• Relay Type: SPDT (Single Pole Double Throw)
• Logic Function: AND / OR voting logic, alarm drive logic
• Contact Rating: Up to 5 A @ 250 VAC (configuration dependent)
• Power Consumption: 5.8 W typical
• Operating Temperature: -30 to +65 °C
• Storage Temperature: -40 to +85 °C
• Humidity: 95% RH, non-condensing
• Mounting: Full-height 3500 rack slot
• Dimensions: 241 mm × 24.4 mm × 242 mm
• Weight: Approximately 0.7 kg
• Software: 3500 Rack Configuration Software

4. Product Introduction

The Bently Nevada 3500/33-01-01 is a 16-Channel Relay Module designed for the 3500 Machinery Protection System. It converts monitoring conditions from 3500 modules into hardwired relay outputs for alarms, shutdown circuits, and plant control interfaces. Each relay channel can be independently configured using alarm drive logic and voting functions.

The module is commonly installed in critical rotating equipment protection systems including turbines, compressors, and pumps. Before replacement, engineers should verify rack configuration, relay wiring, contact voltage requirements, and existing shutdown logic.

3500/33-01-01

5. Installation & Configuration Guide

Stage 1: Pre-Installation Preparation (Approx. 10 minutes)

⚠️ Safety First:

1. Notify operations before removing the relay module.
2. Confirm the protected machine is in a safe maintenance condition.
3. Apply lockout/tagout procedures where required.
4. Remove 3500 rack power and wait at least 5 minutes before handling the module.

Tools Required:

• ESD wrist strap
• PH1 screwdriver
• Digital multimeter
• Wire labels
• Smartphone for wiring photos

Data Backup:

1. Connect using 3500 Rack Configuration Software.
2. Export the current rack configuration.
3. Record relay channel assignments.
4. Photograph terminal wiring and module position.

Stage 2: Removing the Old Module (Approx. 5 minutes)

1. Remove the rack front cover if installed.
2. Label each relay output wire.
3. Disconnect relay terminals carefully.
4. Release rack locking tabs.
5. Pull the module straight out.
6. Inspect the backplane connector and terminal contacts.

⚠️ Note: Keep the old module until the replacement has passed relay testing.

Stage 3: Installing the New Module (Approx. 10 minutes)

1. Wear an ESD strap before handling the replacement module.
2. Verify the part number matches Bently Nevada 3500/33-01-01.
3. Confirm the module is installed in the correct 3500 rack position.
4. Insert the module until fully seated.
5. Reconnect relay wiring using the original terminal documentation.

Configuration Clone (Critical):

• Restore relay channel assignments.
• Verify Alert and Danger alarm sources.
• Confirm AND/OR voting logic.
• Check Normally Energized / Normally De-energized settings.
• Verify shutdown circuit behavior.

Self-Checklist:

[ ] Correct module verified
[ ] Relay wiring checked
[ ] Rack seating confirmed
[ ] Logic configuration restored

Stage 4: Power-On & Testing (Approx. 15 minutes)

Pre-Power Check:

• Verify rack supply voltage.
• Check relay output wiring insulation.
• Confirm no accidental short circuits.

Power-On Steps:

1. Energize the 3500 rack.
2. Check module status LEDs.
3. Verify OK and communication indicators.
4. Connect configuration software.
5. Confirm module recognition.
6. Simulate alarm conditions.
7. Verify each relay output changes state correctly.

⚠️ Troubleshooting Note:

• No relay operation: Check alarm logic assignment.
• Incorrect trip action: Verify relay contact configuration.
• Module not detected: Check rack slot and backplane connection.
• Repeated relay failures: Inspect inductive loads and suppression circuits.

6. Frequently Asked Questions (FAQ)

Q1: Can the Bently Nevada 3500/33-01-01 be hot-swapped?

Do not remove this module under normal operating conditions. The relay outputs may be connected directly to alarm or shutdown circuits, so removing the module under power can affect protection logic.

Q2: What is the difference between 3500/33-01-01 and 3500/33?

The 3500/33-01-01 identifies the complete ordering configuration: the 16-channel relay module with the specified approval option. The system includes relay control and relay output hardware.

Q3: Is the Bently Nevada 3500/33-01-01 obsolete?

The 3500/33 remains widely used in installed 3500 Machinery Protection Systems. Availability depends on supplier stock, condition, and testing documentation.

Q4: Will replacing the relay module delete my shutdown logic?

The hardware replacement does not automatically restore your configuration. Always save the rack configuration before removal and verify every relay assignment after installation.

Q5: What should I check before ordering a replacement?

Verify:

• Model: 3500/33-01-01
• Relay module type: 16-Channel
• Existing rack series: Bently Nevada 3500
• Relay voltage/current requirements
• Hazardous area approval requirements

Q6: Why is this module priced below OEM factory pricing?

Industrial automation parts are often sourced from surplus inventory, maintenance stock, or project leftovers. Price depends on condition, inspection records, availability, and warranty terms. Confirm whether the unit is New Original, New Surplus, or Refurbished before installation.