Product Overview

• PN: 3701/55 289761-01
• Brand: Bently Nevada (Baker Hughes)
• Series: 3700 ADAPT ESD Overspeed Emergency Shutdown System
• Type: Overspeed ES Terminal Base Assembly

• Function: Dedicated bottom terminal base for triple modular redundant overspeed protection modules. It integrates all field sensor wiring terminals, backplane bus connection and module fixed slot, realizes signal access, power distribution and communication docking between external probes and upper control unit. When the main control module needs maintenance or replacement, field cables do not need to be rewired, greatly shortening equipment outage time, and forms a complete anti-overspeed emergency shutdown protection unit together with matching upper board cards

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Core Features

• TMR triple redundant architecture, meets IEC 61508 SIL3 safety level certification
• Centralized terminal wiring design, standardized wiring layout to reduce wiring faults
• Hot-pluggable upper module design, no disconnection of field circuit during card replacement
• Built-in anti-static and surge protection, effectively suppress industrial electromagnetic interference
• Supports Ethernet communication, compatible with static IP and DHCP address assignment
• Strictly follows API 670 turbomachinery protection industry specification

• Integrated system self-diagnosis function to detect wiring abnormity and module offline faults

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Technical Specifications

• Power Input: 12~32 VDC
• Operating Temperature: -40℃ ~ +85℃
• Overall Dimension: 229 × 102 × 44 mm
• Net Weight: Approx 1.5 kg
• HS Code: 8538900000
• Certifications: CE, SIL3, UL

• Product Status: Factory discontinued production; brand new sealed and fully tested refurbished assemblies available

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Compatibility

• Matching Core Module: 3701/55 series overspeed monitoring main board
• Applicable System: Bently ADAPT ESD emergency shutdown protection system
• Accessible Signal Types: Proximity speed probes, switch quantity interlock signals, shutdown relay output

• Upper Connection: Communicates with DCS, PLC and host monitoring system via Modbus TCP/IP

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Application

• Overspeed emergency shutdown safety protection for steam turbines, gas turbines and centrifugal compressors in power and petrochemical industries
• Safety interlock control for high-speed rotating equipment on offshore platforms and chemical production lines
• System transformation, spare replacement and maintenance upgrade for legacy 3700 series overspeed protection cabinets