Bently Nevada 3500/33-03-00 149992-03 Low Current 16-Channel Relay Output Module

Description

The Bently Nevada 3500/33-03-00 149992-03 is a full-height 16-channel relay output module designed to provide advanced programmable safety voting and alarm drive logic for the 3500 Series Machinery Protection System. As a factory-configured low-current assembly, the 3500/33-03-00 149992-03 features specialized gold-plated relay contacts engineered specifically to ensure maximum contact integrity and prevent surface oxidation in low-power signaling applications. Each of its sixteen independent outputs possesses dedicated Alarm Drive Logic, allowing operators to program complex combinational AND/OR logic gates utilizing alert, danger, or Not-OK statuses gathered from any vibration, position, or temperature monitor module across the rack. This combined hardware and software solution serves as a highly reliable, hardware-voted emergency trip bridge between critical plant rotating assets and external Distributed Control Systems (DCS), programmable logic controllers (PLC), or Emergency Shutdown Systems (ESD).

Features

• Complete integrated 16-channel safety relay assembly consisting of the 3500/33-03-00 system code and the 149992-03 gold-contact main processor board.
• Onboard gold-plated contacts optimized for highly stable low-voltage and low-current circuit switching.
• Highly flexible Alarm Drive Logic matrix supporting customized voting schemes based on multi-channel alert and danger variables.
• Live-swap hot-pluggable architecture enabling seamless physical card replacement without disturbing adjacent online machinery protection loops.
• Individual hardware switch assignments on the circuit board allowing independent Normally Energized (NE) or Normally De-energized (NDE) configuration per relay.
• Clear front-panel LED diagnostics providing real-time visual assessment of module health (OK), backplane communication bus activity (TX/RX), and individual channel alarm states.

Applications

• Low-current alarm link interfaces connecting heavy rotating machinery protection racks to industrial PLCs and safety controllers.
• Distributed logic voting and automated emergency shutdown mapping for high-criticality steam turbines, gas turbines, and compressors.
• Multi-point protective trip signaling inside demanding petrochemical facilities, oil refineries, and power generation stations.

Ordering Information

Technical Specifications

Connections/Interfaces

The diagnostic readouts on the front and the physical terminations on the rear facilitate distinct interface tracking:

Installation Guidelines

• Rack Positioning: Slide the complete 3500/33-03-00 149992-03 module assembly into any available full-height slot located strictly to the right of the Transient Data Interface (TDI) module.
• Rear Alignment: Secure the corresponding 16-channel internal termination input/output module (such as 149986-01) into the matching rear slot directly behind the main card.
• Onboard Switch Configuration: Adjust the internal physical toggle switches to determine the required Normally Energized or Normally De-energized status for each channel before sliding the board into the live slot.
• Loop Voltage Verification: Confirm that the downstream instrumentation loops comply strictly with low-voltage and low-current constraints; introducing heavy inductive or high-power loads will destroy the gold-plated contact surfaces.
• Logic Deployment: Open the system rack software suite to map and download the intended AND/OR safety voting matrix into the module non-volatile memory prior to system testing.

Compliance and Certifications

• EMC Directives: European Community Directive 2014/30/EU (EMC Directive).
• EMC Standards: EN 61000-6-2 (Industrial Immunity), EN 61000-6-4 (Industrial Emissions).
• Electrical Safety: Low Voltage Directive 2014/35/EU, EN 61010-1 Standard.
• RoHS Directive: 2011/65/EU European Compliance.
• Hazardous Area Approvals: cNRTLus Class I, Zone 2: AEx/Ex nA nC ic IIC T4 Gc / Class I, Division 2, Groups A, B, C, and D (T4 @ Ta = -20 degC to +65 degC).
• ATEX/IECEx Approvals: II 3 G Ex nA nC ic IIC T4 Gc / Ex ec nC ic IIC T4 Gc.

FAQ

What is the functional relationship between the 3500/33-03-00 code and the 149992-03 part number?

The 3500/33-03-00 represents the complete factory ordering model number specifying a 16-channel relay system configured for low-current applications, while the 149992-03 is the exact manufacturer part number printed on the physical low-current main processor board included in that specific combination.

Why is gold plating critical for the contacts on this module?

Gold plating is vital for low-current circuitry (down to 1 V, 1 mA) because standard silver contacts develop surface oxidation layers over time under low electrical loads, whereas gold resists tarnish to guarantee a clean connection path.

Can I perform a hot-swap on this module while machinery monitoring is actively running?

Yes, the unit features a fully hot-swappable architecture, allowing maintenance teams to remove or insert the card into the slot without disconnecting power or causing signal drops on adjacent monitor channels.

Does a single order of this product supply both the front processor and the rear terminal board?

When purchased as a complete surplus or spare assembly assembly under these factory specifications, it typically denotes the main card; ensure you verify whether your specific system panel requires the matching 149986-01 rear internal termination block as well.