Bently Nevada 149986-02

Ordering Information

3500 4-Channel Relay Module

3500/32 -AA-BB

A: Output Module

01   4-Channel Relay Output Module

B: Agency Approval Option

00   None

01   CSA/NRTL/C (Class I, Div 2)

02   ATEX/IECEx/CSA (Class I, Zone 2)

Spares

149986-02   Spare 4-Channel Relay Control Module

125720-01   Spare 4-Channel Relay Output Module (available for repair only)

125720-02   Spare 4-Channel Relay Output Module for hazardous area systems and      functional safety systems

Technical Parameters

Relay Channels: 4 × Form C (SPDT) contacts in Bently Nevada 149986-02

Contact Ratings:

5 A @ 250 VAC (resistive)

5 A @ 30 V DC (resistive)

Drive Method: Backplane-driven solid-state coil drive—no external supply required

Operate/Release Time: ≤ 10 ms from command to contact change

Dielectric Withstand: 1 kV between coil/contacts and across channels for Bently Nevada 149986-02

Indicators: Front-panel LED per channel indicating energized status

Interface: Dual 50-pin connectors to 3500 digital bus

Power Consumption: 24 V DC via backplane, ≤ 3 W

Environmental:

Operating Temp: 0 °C to +70 °C

Storage Temp: –40 °C to +85 °C

Humidity: up to 95 % RH, non-condensing

Product function

Discrete Output Switching: Energizes external circuits via Bently Nevada 149986-02 in response to protection commands.

High Integrity: Fast, reliable relay action with self-diagnosis for coil/contact faults.

Compact Implementation: Consolidates four relay outputs in a single ¼-rack slot.

Flexible Wiring: Screw-terminal block for field connections.

Application Areas

Turbine & Compressor Protection: Driving trip solenoids with Bently Nevada 149986-02 during shutdown events.

Generator & Motor Panels: Activating breaker-open relays and annunciators.

Process-Plant Interlocks: Integrating alarms into safety systems.

OEM Skid Packages: Providing discrete outputs in panels using Bently Nevada 149986-02.

Retrofit Projects: Adding relay capacity to existing racks via Bently Nevada 149986-02.