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        3701/55 289761-01

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        1001 reviews ｜ Need a Specific Revision?
        Bently Nevada 3701/55 289761-01 ADAPT ESD Terminal Base Assembly is a dedicated hardware infrastructure engineered for emergency shutdown device systems in critical rotating machinery applications.
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        Ships by Thursday, October 29
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
        Shipping Mode
        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
        Parts Availability
        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for 3701/55 289761-01

        • Manufacturer:
          Bently Nevada
        • Part Number:
          3701/55 289761-01
        • Product Family:
          3701/55 ADAPT (ESD) Emergency Shutdown Device
        • Product Type:
          ADAPT ESD Terminal Base Assembly
        • Stock:
          1
        • Enclosure Construction:
          Cast Aluminum Module Cases with Black Powder Coat Finish
        • Input Supply Voltage:
          18 – 36 Vdc
        • Power Consumption:
          24 W typical / 35 W maximum
        • Network Interfaces:
          6 x 10/100 Mbps Ethernet RJ45 ports (2 independent subnet ports per CPU module)
        • Network Protocols & Addressing:
          TCP/IP, supporting Dynamic DHCP and Static IP configuration, NTP time synchronization
        • Discrete & Analog Inputs:
          32-channel DI/PV array (12 channels configurable as 4-20 mA analog or discrete, 20 channels dedicated discrete)
        • Relay Output Architecture:
          3 relay modules containing 12 independent / 2oo3 voting trip relays + 3 System Protection Fault status relays
        • Analog Recorder Outputs:
          2 channels of internally powered 4-20 mA recorder outputs per CPU module (6 channels total, max load 750 Ohm)
        • Operating Temperature:
          -30°C to +65°C (-22°F to +149°F)
        • Storage Temperature:
          -45°C to +85°C (-49°F to +185°F)
        • Operating Humidity & Robustness:
          0% to 95% non-condensing; compliant with IEC 60068-1 vibration (3g @ 3-57 Hz, 5g @ 57-500 Hz) and IEC 60068-2 shock (15g 11 ms)
        • Safety & Hazardous Area Certifications:
          Functional Safety SIL 3 (IEC 61508 / IEC 62061), cNRTLus (Class I, Div 2 / Zone 2), ATEX/IECEx Zone 2
        • Weight:
          0.55 kg
        • Estimated shipping dimensions:
          25.4 x 30.48 x 18.0 cm
        • Tariff Code:
          8537101190
        • Country of origin:
          USA
        • Place of shipment:
          Xiamen,Fujian,China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Applications Diagnostics & Protection Installation Communication & Connectivity

        Features:

        • Triple Modular Redundant (TMR) architecture with three 323174-01 CPU slots and three 323073-01 relay output slots.
        • Dual redundant 18 to 36 Vdc primary power terminal blocks with removable ground jumper for Zener barrier isolation.
        • High-density cast aluminum chassis with black powder coat finish, designed for vertical wall or panel mounting.
        The Bently Nevada 3701/55 289761-01 is a master terminal base assembly designed as the physical and electrical foundation for the 3701/55 ADAPT ESD system.

        It integrates internal communications backplane, dual power distribution, and field wiring terminals for up to 32 discrete/process inputs, 6 speed channels, and 12 trip relay outputs.

        Must be mounted vertically with power terminals exiting horizontally inside a cabinet with at least 9 inches (22.86 cm) of depth for optimal convection cooling.

        The Bently Nevada 3701/55 289761-01 is supplied as a brand new original item by the manufacturer (OEM).
        Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        • Emergency shutdown device (ESD) and electronic overspeed protection for steam, gas, and hydro turbines.
        • Overspeed tripping and machinery safety shutdown for high-speed industrial expanders and turbocompressors.
        • SIL 3 compliant safety instrumented system (SIS) integration in oil & gas, petrochemical, and power generation plants.
        • Supports up to 500 configurable logic blocks with a total system input-to-output contact latency of 30 ms or less.
        • Features 3 dedicated System Protection Fault relays to report internal system health, power loss, or CPU faults.
        • Includes 6 channels of 4-20 mA internally powered recorder outputs (2 per CPU) for process monitoring and trend logging.
        • Designed for vertical panel or wall mounting with horizontal power terminal orientation to ensure natural convection cooling.
        • Requires a minimum cabinet enclosure depth of 9.0 inches (22.86 cm) with adequate clearance for field cable bending.
        • Features keyed module slot guides and a removable grounding jumper to simplify field wiring and barrier isolation setup.
        • Equipped with 6 x 10/100 Mbps Ethernet RJ45 ports providing two independent subnets per CPU module.
        • Supports TCP/IP networking with choice of Static IP address or Dynamic DHCP client configuration.
        • Includes Network Time Protocol (NTP) synchronization support for real-time event timestamping.
        Description
        Bently Nevada 3701/55 289761-01 is a master terminal base assembly engineered for machinery protection and emergency shutdown (ESD) applications across critical rotating equipment, including steam, gas, and hydro turbines, as well as expanders. As the core physical and electrical foundation of the Triple Modular Redundant (TMR) architecture, it securely routes sensor signals, discrete inputs, and process variables into the processing core. Its high-density terminal layout and rugged enclosure ensure rapid, fault-tolerant protective actions during overspeed or severe process anomalies, preventing catastrophic equipment damage.

        During system installation and field wiring, the Bently Nevada 3701/55 289761-01 terminal base provides flexible and safe grounding and isolation options. The base features a removable ground jumper that, when removed, disconnects the monitor circuit common from the chassis ground to enable proper single-point grounding when integrating with Zener safety barriers. Additionally, it supports dual redundant 18–36 Vdc power supply inputs with keyed module slots to eliminate the risk of unexpected shutdown caused by power loss or module mis-insertion.

        As an essential hardware component supporting SIL 3 safety compliance, the Bently Nevada 3701/55 289761-01 delivers exceptional resistance to vibration, shock, and atmospheric corrosion. Its cast aluminum chassis with a black powder coat finish withstands harsh environment conditions typical of petrochemical plants, offshore platforms, and power generation facilities. The modular design allows engineers to easily hot-swap CPU and relay modules, significantly simplifying field commissioning, routine maintenance, and long-term system servicing.
        Alternative Names
        3701/55 289761-01 3701/55-289761-01 370155 28976101 3701/55 289761 01 289761o1 Bently Nevada 3701/55 289761-01 289761-01 Terminal Base Assembly Bently Nevada ADAPT ESD Terminal Base Assembly
        Technical notes
        The Bently Nevada 3701/55 289761-01 terminal base must be installed in a vertical orientation, with the power terminals facing horizontally, to maintain the airflow path required for natural convection cooling.
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        What is the main function of the Bently Nevada 3701/55 289761-01?
        The Bently Nevada 3701/55 289761-01 serves as the master terminal base assembly for the 3701/55 ADAPT ESD system, providing physical mounting, internal communications backplane, and field wiring terminals for power, sensor inputs, and trip relays.
        Which hardware modules are installed onto the Bently Nevada 3701/55 289761-01 base?
        The Bently Nevada 3701/55 289761-01 base accommodates three 323174-01 CPU Processing Modules and three 323073-01 (or 323073-02 gold-plated) 4-Channel Relay Output Modules to form a full Triple Modular Redundant (TMR) system.
        What are the installation orientation and cabinet clearance rules for Bently Nevada 3701/55 289761-01?
        The Bently Nevada 3701/55 289761-01 must be mounted vertically with the power supply terminal exiting horizontally for thermal dissipation. The mounting enclosure must have a minimum depth of 9.0 inches (22.86 cm).
        What safety capability level does the Bently Nevada 3701/55 289761-01 system support?
        The 3701/55 ADAPT ESD system built on the Bently Nevada 3701/55 289761-01 terminal base is certified as a SIL 3 safety device under IEC 61508 and IEC 62061 standards.
        How to adjust grounding on Bently Nevada 3701/55 289761-01 when using Zener barriers?
        The Bently Nevada 3701/55 289761-01 contains a removable ground jumper. Removing this jumper disconnects circuit common from the monitor chassis, allowing proper isolated grounding at the Zener barrier busbar.
        How can I request a quotation or verify delivery stock for Bently Nevada 3701/55 289761-01?
        You can send us a direct RFQ with your requested part number (289761-01) and quantity to receive an official quotation, global lead time, and stock availability.

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