Description
Bently Nevada 136711-02 (3500/61) Temperature I/O Module Product Introduction
Product Overview
The Bently Nevada 136711-02 is a specialized 3500/61 Temperature I/O Module with built-in intrinsic safety (IS) barriers and internal terminations, designed exclusively for hazardous area temperature monitoring in the 3500 Machinery Protection System. Different from conventional 133819 and 133827 series ordinary temperature modules, this model integrates isolated safety barriers and internal screw terminals, eliminating the need for external safety barriers and separate terminal blocks. It serves as the front-end signal acquisition unit for RTD (PT100) and thermocouple (TC) temperature sensors deployed in explosive, flammable and high-risk industrial zones.
Fully compliant with API 670 machinery safety standards and global intrinsic safety explosion-proof specifications, the 136711-02 revision provides isolated signal conversion, noise filtering and safety voltage/current limiting for field temperature signals. It transmits safe, standardized temperature data to 3500/61 temperature monitor modules for alarm, trip judgment and data recording. Featuring compact integrated design, hazardous area adaptability and high signal isolation performance, it is the core dedicated I/O hardware for petrochemical, offshore platform and oil & gas hazardous area machinery protection systems, widely used for new high-standard explosion-proof projects and legacy hazardous loop renovation.
136711-02
Core Technical Parameters
| Parameter Item | Technical Specifications |
| Official Part Number | 136711-02 (3500/61 IS Barrier Temperature I/O Module) |
| Product Type | Intrinsic Safety Explosion-Proof Temperature Signal I/O Module |
| Core Function | Hazardous area RTD/TC signal acquisition, internal IS barrier safety isolation, signal filtering conversion, safe data transmission and full-loop fault diagnosis |
| Compatible Sensors | PT100 RTD and multi-standard industrial thermocouples for hazardous area deployment |
| Monitoring Channels | 6 independent high-isolation temperature acquisition channels |
| Core Configuration | Built-in intrinsic safety barriers + internal screw terminations (no external barrier required) |
| Signal Bandwidth | 30 kHz high-frequency stable signal response |
| Power Consumption | 9W low power industrial energy-saving design |
| Resolution & Accuracy | 16-bit high-precision sampling, ultra-low temperature drift, consistent measuring accuracy |
| Status Indicators | Front-panel OK, TX/RX, Bypass LED status indicators for real-time module status viewing |
| System Compatibility | Fully compatible with standard 3500 rack systems, matches 3500/61 temperature monitor modules perfectly |
| Configuration Method | Full parameter configuration via official Bently Nevada 3500 system software |
| Operating Temperature | -25℃ ~ +65℃ industrial wide-temperature range |
| Humidity Range | 5%~95% RH, non-condensing |
| Industrial Certification | API 670 compliant, intrinsic safety explosion-proof certified, EMC anti-interference qualified |
| Diagnostic Function | Sensor fault detection, signal abnormality diagnosis, internal barrier self-test, communication status monitoring and fault code output |
Main Product Features
3.1 Integrated Intrinsic Safety Barrier Design (Core Advantage)
Different from ordinary temperature I/O modules, the 136711-02 integrates professional intrinsic safety isolation barriers inside the module. It limits on-site loop voltage and current within safe values, effectively preventing electric spark ignition risks in flammable and explosive hazardous areas. It eliminates the need for external safety barrier modules, greatly simplifying system cabinet layout, reducing wiring complexity and lowering overall engineering costs for hazardous area monitoring systems.
3.2 Built-In Internal Screw Terminals
This module adopts an integrated internal terminal design, with no need for external terminal blocks for signal wiring. The integrated screw terminals ensure firm and stable connection of field sensor cables, avoid signal loose connection and interference caused by intermediate terminal conversion, improve the reliability of temperature signal transmission, and facilitate on-site installation, wiring and later maintenance inspection.
3.3 6-Channel Independent High-Isolation Acquisition
Supporting six fully independent temperature acquisition channels, each channel is equipped with independent safety isolation and signal processing circuits. It realizes synchronous high-precision collection of multi-point RTD/TC temperature signals, with zero crosstalk between channels. It can stably collect key temperature data of equipment bearings and casings in complex hazardous working conditions, providing accurate original data for temperature protection judgment.
3.4 Explosion-Proof & Harsh Environment Adaptability
Designed specifically for industrial hazardous areas, the module passes strict intrinsic safety explosion-proof certification. It features strong electromagnetic interference resistance, wide temperature adaptability and high humidity resistance, and can operate stably for a long time in flammable, explosive, high-dust and high-electromagnetic-interference industrial environments such as petrochemical plants and offshore platforms, ensuring continuous and effective operation of temperature monitoring loops.
3.5 Real-Time Status Monitoring & Comprehensive Diagnosis
Equipped with three front-panel LED indicators (OK, TX/RX, Bypass), the module intuitively displays operating status, communication state and bypass mode in real time. It supports full-link fault diagnosis covering field sensors, signal lines, internal safety barriers and acquisition circuits, accurately locating faults such as sensor damage, line disconnection/short circuit and barrier abnormality, helping maintenance personnel quickly troubleshoot hidden dangers.
3.6 Simplified System Architecture & Low Lifecycle Cost
The all-in-one design of safety barrier + terminal + signal acquisition replaces the traditional “ordinary I/O module + external barrier + external terminal block” combination scheme, greatly simplifying system structure. It reduces equipment procurement costs, cabinet space occupation and wiring workload. With mature industrial-grade circuit design and low failure rate, it effectively reduces long-term operation and maintenance costs of hazardous area monitoring systems.
Specific Application Scenarios
The 136711-02 is a dedicated explosion-proof temperature I/O module for hazardous industrial areas, exclusively used for temperature signal acquisition of rotating machinery in flammable and explosive environments, matching 3500/61 monitor modules to build intrinsically safe temperature protection systems.
Typical Industrial Application Scenarios:
• Petrochemical Hazardous Zone Projects: Temperature monitoring signal acquisition for compressors, pumps and reaction equipment in explosive chemical production zones.
• Oil & Gas Onshore & Offshore Platforms: Intrinsically safe temperature collection for gas transmission compressors and offshore rotating machinery in flammable gas environments.
• Refinery & Chemical Plant Units: Full-condition temperature monitoring of core process equipment in high-risk explosion-proof areas to ensure safe operation of production units.
• Hazardous Area System Renovation: Upgraded replacement for traditional split barrier + I/O modules, simplifying system structure and improving explosion-proof safety level.
• High-Standard Explosion-Proof Monitoring Projects: Preferred hardware for industrial projects requiring intrinsic safety certification and integrated compact design.
136711-02
Supporting Components
The 136711-02 intrinsically safe temperature I/O module forms a complete high-reliability explosion-proof temperature monitoring system with standard 3500 series supporting hardware:
• 3500/05 System Rack: Standard system chassis, providing stable mechanical installation and bus communication.
• 3500/15 Redundant Power Supply: Dual redundant power supply to ensure uninterrupted operation of explosion-proof monitoring loop.
• 3500/22 Transient Data Interface: Realizing remote configuration, temperature data upload and upper monitoring platform docking.
• 3500/61 Temperature Monitor Module: Matching core module for temperature data analysis, alarm/trip judgment and analog recorder output.
• Explosion-Proof RTD/TC Sensors: Intrinsically safe field temperature sensors adapted to hazardous areas.
• Flame-Retardant Shielded Signal Cables: Special explosion-proof and anti-interference cables for hazardous area signal transmission.
Related Series Models & Version Iteration
The 136711-02 is a special explosion-proof customized model in the 3500/61 temperature series, with clear functional differentiation from conventional temperature I/O modules:
• 136711-02 (Explosion-Proof Integrated Version): Exclusive intrinsically safe module with internal barrier and terminals, specially used for hazardous area temperature monitoring, no external barrier needed.
• 133819-01/02 (Ordinary I/O Version): Conventional temperature acquisition modules without safety barrier function, only suitable for non-hazardous common industrial areas.
• 133827-02 (Ordinary Monitor Version): Ordinary 3500/61 temperature monitor module, without explosion-proof barrier design, matched with ordinary I/O modules for non-explosion-proof projects.
• 3500/60 Series Modules: Standard temperature protection modules, no recorder output and no explosion-proof capability, used for conventional safety monitoring scenarios.
• Explosion-Proof Vibration I/O Modules: Cooperate with 136711-02 to realize full-parameter explosion-proof condition monitoring of rotating machinery in hazardous areas.
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