Product Specification Document: Bently Nevada 3500/32M

1. Product Overview

2. Basic Product Information

Manufacturer and Model Identity

• Manufacturer: Bently Nevada (Baker Hughes)

• Product Series: 3500 Machinery Protection System

• Model Number: 3500/32M (Part Numbers: 125720‑01, 184631‑02, 184704‑01)

• Product Type: 4‑Channel Isolated Relay Output Module

• System Compatibility: 3500 Rack System; all 3500 monitoring modules; 3500 Rack Configuration Software

• Country of Origin: United States

Electrical Characteristics

• Power Supply: +24 V DC from 3500 rack backplane; no external power required

• Power Consumption: ≤5.8 W (typical)

• Relay Type: Electromechanical, SPDT (Single Pole Double Throw), epoxy‑sealed

• Contact Rating: 5 A @ 24 V DC / 240 V AC (resistive load); 1 A @ 120/240 V AC (inductive)

• Relay Switching Time: <10 ms

• Relay Life: ≥100,000 operations at rated load

• Isolation: 250 V AC channel‑to‑channel and channel‑to‑backplane

Physical and Mechanical

• Enclosure: Heavy‑duty metal, EMI‑shielded, conformal‑coated PCB

• Dimensions: 241 mm × 24.4 mm × 242 mm (9.50 in × 0.96 in × 9.52 in)

• Net Weight: ~0.7–0.74 kg (1.54–1.63 lb)

• Rack Slot: Full‑height, single‑slot; installs right of TDI module

• Front Panel Indicators: Four channel LEDs (alarm/relay status); module fault LED

• Enclosure Rating: IP20 (indoor use; finger‑contact protected)

Compliance and Certification

• Standards: API 670 (4th edition), ISO 10816, IEC 61000‑6‑2, IEC 61000‑6‑4

• EMC: CE marked; enhanced RFI/EMI immunity for industrial noise

• Environmental: RoHS compliant; halogen‑free materials

• Certifications: cULus, ATEX/IECEx (optional), CSA; SIL 2 capable

• Quality: ISO 9001 manufacturing; 100% factory tested and calibrated

3. Function and Product Positioning

Core Functions

• Alarm State Conversion: Translates Alert, Danger, Not‑OK, and Process Variable Limit (PPL) signals from any 3500 monitor into relay outputs for external annunciation or tripping.

• Configurable Logic Control: Each relay supports independent AND/OR voting, latching, and normal/true state selection via 3500 Rack Configuration Software.

• Fail‑Safe Operation: Relays de‑energize on fault or power loss, ensuring safe default states for ESD and critical interlocks.

• Multi‑Channel Voting: Combines inputs from multiple monitors to prevent false trips (e.g., 2‑out‑of‑3 voting for turbine protection).

• Diagnostic Monitoring: Provides LED status for each relay and module health, with fault reporting to the 3500 system.

Operational Features

• Independent Channel Control: Four fully isolated SPDT relays, each configurable for unique alarm or shutdown tasks.

• Software‑Configurable: No hardware jumpers; all logic and settings programmed via 3500 Rack Configuration Software.

• Epoxy‑Sealed Relays: Resist vibration, dust, moisture, and chemical exposure in harsh industrial environments.

• Hot‑Swappable: Supports replacement without rack shutdown (power‑down recommended for safety).

Product Positioning

• API 670‑compliant alarm and ESD interfaces for turbines, compressors, and generators

• Multi‑condition voting logic to minimize false trips in critical equipment

• Integration with PLC/DCS/ESD systems for remote monitoring and control

• Retrofit projects replacing legacy 3300 series relay modules

4. Core Performance Parameters

Relay Performance

• Number of Channels: 4 independent, isolated SPDT relays

• Logic Functions: AND, OR, 2‑out‑of‑3 voting, latching, normal/true state selection (per channel)

• Trigger Inputs: Alert, Danger, Not‑OK, PPL from any 3500 monitor channel

• Energization Modes: Fail‑safe (de‑energized = alarm); non‑fail‑safe configurable

Environmental Limits

• Operating Temperature: −40°C to +70°C (−40°F to +158°F)

• Storage Temperature: −55°C to +85°C (−67°F to +185°F)

• Relative Humidity: 5%–95% RH (non‑condensing)

• Vibration Resistance: 25 g (5 Hz–2 kHz); 50 g shock (11 ms half‑sine)

• EMI Immunity: >60 dB attenuation (1 MHz–1 GHz), meeting IEC 61000‑6‑2

Reliability

• MTBF: >230,000 hours (25°C, full load)

• Warranty: 1 year (standard); extended warranties available

• Lifecycle Status: Active production; fully supported in new and legacy 3500 systems

5. General Matching Accessories

Installation and Mounting

• 3500 rack mounting hardware (standard with rack)

• Front panel key lock (security for configuration access)

• Shielded cable glands (for external relay wiring)

• DIN rail adapter (optional, for standalone mounting)

System Compatibility

• 3500/22M TDI Module (required for configuration)

• 3500 Series Power Supply Modules (e.g., 3500/15)

• 3500 Rack Configuration Software (v4.0+)

• System 1 Machinery Management Software (for alarm diagnostics)

Maintenance and Spares

• Replacement relay contact kits (per channel)

• Conformal coating touch‑up kit (PCB protection)

• LED indicator replacement set

• Annual calibration verification certificate

Documentation and Software

• 3500/32M datasheet and installation manual

• 3500 Rack System Planning Guide

• 3500 Relay Logic Application Note

• Factory test and calibration report (included with unit)

6. Applicable Equipment and Industry Fields

Primary Applications

• Power Generation: Steam/gas turbines, generators, and critical compressors in thermal, combined‑cycle, and nuclear power plants.

• Oil and Gas: Centrifugal compressors, turboexpanders, and large pumps in refineries, LNG facilities, and offshore platforms.

• Petrochemical: Process compressors, reactors, and high‑speed rotating equipment requiring multi‑condition alarm logic.

Secondary Applications

• Heavy Industry: Steel mill rolling mills, industrial fans, and blowers for vibration alarm and interlock control.

• Marine: Ship propulsion turbines and generators for ESD and alarm annunciation.

• Utilities: Water treatment large pumps and blowers for protective relay interfacing.

Compatibility Notes

• 3500 Rack Exclusive: Designed only for 3500 series racks; not compatible with 3300 series systems.

• TDI Module Dependent: Configuration requires a 3500/22M TDI module in the same rack.

• Isolation Requirements: External wiring must maintain 250 V AC isolation between relay channels to prevent cross‑talk。