Product Specification Document: Bently Nevada 3500/62-04-00
June 08, 2026

Product Specification Document: Bently Nevada 3500/62-04-00

The 3500/62-04-00 is a 6‑Channel Process Variable (PV) Monitor manufactured by Bently Nevada (Baker Hughes), serving as the auxiliary parameter monitoring module within the 3500 Machinery Protection System. It integrates standard industrial analog signals—4–20 mA current and ±10 V DC voltage—from transmitters measuring pressure, temperature, flow, level, and other critical process variables. Designed for full‑height, single‑slot installation in any 3500 rack monitor slot, the 3500/62-04-00 features internal terminations (the ‑04‑00 suffix) for direct field wiring without external terminal blocks. It complements primary vibration/position monitors by ensuring auxiliary process conditions stay within safe limits, supporting API 670 compliance and SIL 2 capability for power generation, oil and gas, and petrochemical facilities.

Description

Product Specification Document: Bently Nevada 3500/62-04-00

1. Product Overview

The 3500/62-04-00 is a 6‑Channel Process Variable (PV) Monitor manufactured by Bently Nevada (Baker Hughes), serving as the auxiliary parameter monitoring module within the 3500 Machinery Protection System. It integrates standard industrial analog signals—4–20 mA current and ±10 V DC voltage—from transmitters measuring pressure, temperature, flow, level, and other critical process variables.
Designed for full‑height, single‑slot installation in any 3500 rack monitor slot, the 3500/62-04-00 features internal terminations (the ‑04‑00 suffix) for direct field wiring without external terminal blocks. It complements primary vibration/position monitors by ensuring auxiliary process conditions stay within safe limits, supporting API 670 compliance and SIL 2 capability for power generation, oil and gas, and petrochemical facilities.

2. Basic Product Information

Manufacturer and Model Identity

  • Manufacturer: Bently Nevada (Baker Hughes)

  • Product Series: 3500 Machinery Protection System

  • Model Number: 3500/62-04-00 (Alternative Part Numbers: 133811‑03, 126625‑01)

  • Product Type: 6‑Channel Analog Process Variable Monitor (Internal Terminations)

  • System Compatibility: 3500 Rack System; 3500/22M TDI Module; System 1 Software; 3500/32M Relay Output Module

  • Country of Origin: United States

Electrical Characteristics

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

  • Power Consumption: ≤7.0 W (maximum)

  • Input Channels: 6 fully isolated analog inputs

  • Input Signal Ranges: 4–20 mA DC (current); −10 V DC to +10 V DC (voltage)

  • Input Impedance: 250 Ω (4–20 mA); >1 MΩ (voltage)

  • Resolution: 16‑bit analog‑to‑digital conversion

  • Accuracy: ±0.05% of full scale (25°C)

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

  • Relay Outputs: 6 configurable Alert/Danger relays (via 3500/32M)

Physical and Mechanical

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

  • Dimensions: 241.3 mm × 24.4 mm × 241.8 mm (9.50 in × 0.96 in × 9.52 in)

  • Net Weight: ~0.82 kg (1.81 lb)

  • Rack Slot: Full‑height, single‑slot; installs in any 3500 monitor slot

  • Front Panel Indicators: Six channel status LEDs; module fault LED; power 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

The 3500/62-04-00 is a highly configurable 6‑channel analog monitor that integrates and safeguards critical process variables for rotating machinery protection.

Core Functions

  • Analog Signal Conditioning: Converts 4–20 mA/±10 V DC transmitter signals into digital data for monitoring and analysis.

  • User‑Programmable Alarm Logic: Each channel supports independent Alert/Danger setpoints, with configurable hysteresis and voting logic (AND/OR) for alarm annunciation or ESD triggering.

  • Auxiliary Parameter Protection: Monitors non‑vibration parameters (pressure, flow, temperature) to prevent machinery damage from process upsets.

  • Sensor Diagnostics: Detects open/short circuits, signal overload, and out‑of‑range conditions with fault reporting to the 3500 system.

  • Data Integration: Transmits real‑time PV data to System 1 software for trending, diagnostics, and historian logging.

Operational Features

  • Internal Terminations: Field wiring connects directly to the module’s rear terminals, eliminating external I/O modules and reducing installation cost.

  • Software‑Configurable: All settings (input range, alarm thresholds, scaling) programmed via 3500 Rack Configuration Software—no hardware jumpers.

  • Hot‑Swappable: Supports replacement without rack shutdown, minimizing maintenance downtime.

  • Scalable Input Ranges: User‑defined scaling for 4–20 mA/±10 V signals to match any engineering unit (e.g., bar, °C, m³/h).

Product Positioning

Positioned as the standard auxiliary monitor for 3500‑based machinery protection systems, the 3500/62-04-00 is the primary choice for:
  • API 670‑compliant monitoring of non‑vibration parameters for turbines, compressors, and generators

  • Integrating third‑party transmitter data into the 3500 protection system

  • Complementing vibration/position monitors with process‑condition alarms

  • Retrofit projects replacing legacy 3300 series PV monitors

4. Core Performance Parameters

Measurement Performance

  • Number of Channels: 6 independent, isolated analog input channels

  • Signal Compatibility: 4–20 mA DC (2‑wire/4‑wire transmitters); ±10 V DC

  • Scaling: User‑configurable engineering units (EU) with custom min/max values

  • Alarm Types: High/High‑High, Low/Low‑Low, deviation, and rate‑of‑change

  • Hysteresis: 0.1–10% of full scale (per channel)

Communication and Outputs

  • Backplane Communication: 3500 high‑speed proprietary bus (to TDI module)

  • Data Formats: Real‑time PV values (EU); alarm status; fault logs; trending data

  • System Integration: Works with System 1 for data visualization, alarming, and reporting

  • Relay Coordination: Triggers 3500/32M relays for external alarm/ESD interlocks

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: >210,000 hours (25°C, full load)

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

  • Lifecycle Status: Active production; fully supported for new and retrofit projects

5. General Matching Accessories

Installation and Mounting

  • 3500 rack mounting hardware (standard with rack)

  • Front panel key lock (security for configuration access)

  • Shielded twisted‑pair cables (for 4–20 mA/±10 V field wiring)

  • EMI‑shielded cable glands (rear panel wiring)

System Compatibility

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

  • 3500/15 Power Supply Module (rack power)

  • 3500/32M Relay Output Module (alarm/ESD interfacing)

  • System 1 Machinery Management Software (v4.0+)

  • 3500 Rack Configuration Software

Maintenance and Spares

  • Replacement front panel LEDs and indicators

  • Conformal coating touch‑up kit (PCB protection)

  • Firmware update kit (via TDI module)

  • Annual calibration verification certificate

Documentation and Software

  • 3500/62-04-00 datasheet and installation manual

  • 3500 Process Variable Monitoring Application Note

  • 3500 Rack System Planning Guide

  • 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 plants (monitoring bearing pressure, lube oil temperature, fuel gas flow).

  • Oil and Gas: Centrifugal compressors, turboexpanders, and large pumps in refineries, LNG facilities, and offshore platforms (monitoring suction/discharge pressure, process temperature, level).

  • Petrochemical: Process compressors, reactors, and high‑speed rotating equipment (monitoring process variables alongside vibration for full protection).

Secondary Applications

  • Heavy Industry: Steel mill rolling mills, industrial fans, and blowers (monitoring bearing temperature, hydraulic pressure).

  • Marine: Ship propulsion turbines and generators (monitoring lube oil pressure, cooling water temperature).

  • Utilities: Water treatment large pumps and blowers (monitoring flow, pressure, and vibration).

Compatibility Notes

  • Internal Terminations Only: The ‑04‑00 variant has fixed internal terminations; for external terminations, select 3500/62‑03‑00.

  • No Direct Analog Outputs: Requires 3500/22M for data export to DCS/PLC; use 3500/61 for per‑channel 4–20 mA outputs.

  • TDI Dependent: Full configuration and data logging require a 3500/22M TDI module in the same rack.


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