Product Overview

The Bently Nevada 3500/32 is a sophisticated 4-channel relay solution designed for the 3500 series Turbine Supervisory Instrumentation (TSI) platform. This assembly includes the 125712-01 main controller module and the 125720-01 I/O termination block. Together, they function as the physical execution layer for machinery protection, converting digital alarm logic into mechanical contact closures. These relays are primary tools for executing emergency machine shutdowns, triggering audible sirens, or interfacing with external safety PLC systems.

The defining characteristic of the 3500/32 is its advanced Alarm Drive Logic. Unlike basic relay cards, this module allows for complex "voting" configurations. Operators can program each of the four relays to trigger based on custom AND/OR logic combinations derived from any monitoring channel within the 3500 rack. This ensures that protective actions are only taken when specific, verified hazard conditions are met, effectively eliminating the risk of costly nuisance trips.

Industrial Resilience and Diagnostics

Engineered for the rigorous demands of power generation and heavy industrial plants, the 3500/32 assembly features an epoxy-sealed hardware design that protects sensitive internal circuitry from corrosive gases and moisture. The module supports both "Normally Energized" and "Normally De-energized" operation, allowing for fail-safe configurations that trigger a shutdown even in the event of a total power loss to the monitoring rack.

Diagnostic transparency is maintained through a high-visibility LED array on the front panel. These indicators provide real-time telemetry on the module's "OK" status, internal communication (TX/RX), and individual channel alarm states. This allows maintenance personnel to verify the integrity of the safety loop at a glance, ensuring that the critical protection path between the vibration sensors and the final control elements remains functional and ready.

Technical Specifications

• Model Number: 3500/32

• Component Parts: 125712-01 (Main Module) + 125720-01 (I/O Module)

• Channel Count: 4 Independent Programmable Channels

• Logic Integration: Customizable AND/OR Alarm Drive Logic

• Relay Type: Double-pole, double-throw (DPDT) architecture

• Contact Rating: 5A @ 24 Vdc / 120 Vac

• Housing: Epoxy-sealed industrial grade

• Status Monitoring: OK, TX/RX, and Channel Alarm LEDs

• Environmental Rating: Suitable for harsh TSI environments

• HS Code: 8537101190

• Manufacturing Origin: USA

• Weight: 1.5Kg

• Dimentions:  125712-01(24x24x2cm)  125720-01 (24x2x9cm)