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3500/77M 143737-01

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The 3500/77M 143737-01 is a full-height rear slot Cylinder Pressure I/O Module with External Terminations engineered for the Bently Nevada 3500/77M Recip Cylinder Pressure Monitor system.
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Technical specifications for 3500/77M 143737-01

  • Manufacturer:
    Bently Nevada
  • Part Number:
    3500/77M 143737-01
  • Product Family:
    3500 System
  • Product Type:
    Cylinder Pressure I/O Module
  • Stock:
    1
  • Number of Channels:
    4 input channels
  • Transducer Input Type:
    Accepts 1 to 4 positive voltage pressure transducers (psia)
  • Input Impedance:
    50 kΩ
  • Transducer Power Supply:
    +23.0 ± 0.8 Vdc with 24.5 mA current limiting on each channel
  • Frequency Response:
    0 Hz to 5.5 kHz on all configured pressure channels
  • Connectors:
    4 front-panel coaxial connectors (1 per channel)
  • Operating Temperature:
    -30°C to +65°C (-22°F to +150°F)
  • Storage Temperature:
    -40°C to +85°C (-40°F to +185°F)
  • Operating Humidity:
    95%, non-condensing
  • EMC Directives:
    European Community Directive 2014/30/EU (EN 61000-6-2, EN 61000-6-4)
  • Electrical Safety:
    Low Voltage Directive 2014/35/EU (EN 61010-1)
  • Output Protection:
    Short-circuit protected
  • Signal Characteristics:
    Inverted and offset by -2.265 Vdc
  • Output Impedance:
    550 Ω
  • Scale Factor Ranges:
    Assumes +0.5 Vdc at 0 psia to +10.0 Vdc at full range
  • 100 psia Range:
    95,000 mV/psi
  • Weight:
    0.2 kg
  • Estimated shipping dimensions:
    241.3 x 24.4 x 99.1 mm
  • 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 Compatibility & Interoperability Integration Configuration

Features:

  • Separates panel field wiring from the monitoring rack by routing transducer signals through external termination blocks.
  • Delivers regulated +23.0 Vdc sensor power with individual channel current restriction set to 24.5 mA maximum.
  • Provides front-accessible, inverted, and offset buffered output channels designed for real-time diagnostic instruments.
The Bently Nevada 143737-01 serves as the external termination interface module for the 3500/77M Recip Cylinder Pressure Monitoring system. It is installed in a single full-height rear slot of the 3500 machinery rack to collect dynamic pressure signals from reciprocating compressors.

Unlike internal termination modules, the 143737-01 architecture is built for environments where field wiring must terminate at remote DIN-rail terminal strips. Dynamic dynamic pressure data is transmitted securely from external sensors to the 3500 monitor backplane for protective alarm evaluation.

Please note that external termination blocks (such as model 125808-10 or 128015-10) and 129525 connection cables are required hardware components that must be specified separately when deploying this module.

Availability The Bently Nevada 143737-01 Cylinder Pressure I/O Module is available for shipment with original factory-level specifications guaranteed 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.
  • Remote cabinet transducer termination for multi-cylinder heavy-duty gas compression facilities.
  • Dynamic dynamic pressure signal acquisition for machinery rod stress, peak compression, and tension load evaluation.
  • Continuous operational monitoring to determine cylinder volumetric efficiency and degree of rod reversal timing.
  • Maintains direct physical and logical backplane communication exclusively with the 3500/77M main processing monitor.
  • Pairs seamlessly with external termination block assemblies (125808-10 Euro-style and 128015-10 terminal strip options).
  • Connects to third-party positive voltage pressure sensors rated up to 10,000 psia across full dynamic operating ranges.
  • Integrates seamlessly into the Bently Nevada 3500 Machinery Protection System alongside the 3500/77M processing monitor.
  • Links third-party dynamic pressure transducer signals directly to the rack backplane for system-wide alarm and trip logic.
  • Requires 3500/77M Module Firmware Revision L and 3500/01 Software Version 3.00 or higher for full system recognition and configuration.
  • Supports customizable pressure scale factor settings ranging from 950 mV/psi to 95,000 mV/psi across full-scale ranges.
  • Configurable through 3500/01 software to define channel active status, transducer input limits, and dynamic sampling parameters.
  • Allows precise setup of pressure variables for accurate calculation of cylinder compression ratios and peak rod loads.
Description
Bently Nevada 3500/77M 143737-01 Cylinder Pressure I/O Module is a specialized rear-panel interface board designed for the 3500/77M Machinery Condition Monitoring system. It serves as the primary signal routing node that receives input signals from up to four Bently-approved third-party dynamic cylinder pressure transducers installed on heavy-duty reciprocating compressors.

Engineered specifically for external termination architecture, the 143737-01 routes field transducer signals through external termination cables to remote DIN-rail termination blocks. This design isolates cabinet field wiring from the main 3500 rack backplane, allowing panel builders to streamline internal layout while simplifying long-term maintenance and hardware replacement procedures.

Critical to reciprocating compressor protection across petrochemical plants and gas transmission facilities, the 143737-01 enables real-time monitoring of internal cylinder dynamics. Signals conditioned through this module allow the 3500/77M monitor to accurately compute essential machinery variables including compression ratios, peak rod compression, peak rod tension, and degree of rod reversal.
Alternative Names
143737-01 14373701 3500/77M 143737-01 3500 77M 143737-01 143737-01 I/O Module Bently Nevada 143737-01 Bently Nevada 3500/77M 143737-01 143737-01 External Termination Module
Technical notes
Bently Nevada 3500/77M 143737-01 requires standalone external termination blocks (part 125808-10 or 128015-10) and 129525 interface cables, which must be ordered separately from the module.
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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.
What key thermodynamic and mechanical variables are computed using signals from the Bently Nevada 143737-01?
Signals routed through the Bently Nevada 143737-01 allow the 3500/77M monitor to compute discharge pressure, suction pressure, maximum/minimum pressure, compression ratio, peak rod compression, peak rod tension, and degree of rod reversal.  
What machinery parameters are calculated using signals conditioned through the 143737-01?
Signals passed through the 143737-01 allow the 3500/77M system to compute discharge pressure, suction pressure, maximum pressure, minimum pressure, compression ratio, peak rod compression, peak rod tension, and degree of rod reversal.
What are the electrical characteristics of the buffered outputs on the 143737-01?
The front-panel coaxial buffered outputs on the 143737-01 are short-circuit protected, inverted, and offset by -2.265 Vdc with a 550 Ω output impedance.
Which external termination blocks can be connected to the 143737-01?
The 143737-01 can be connected to either the 125808-10 Euro Style termination block or the 128015-10 Terminal Strip connector block.
What software and firmware revisions are required to operate the 143737-01?
Operating the 143737-01 requires 3500/77M Module Firmware Revision L or later, 3500/01 Software Version 3.00, 3500/02 Software Version 2.30, and 3500/03 Software Version 1.30 or higher.
Where can users purchase and request technical quotes for the Bently Nevada 143737-01?
Official technical documentation is available from Bently Nevada, while price quotes, availability, and global commercial support for the 143737-01 can be requested directly through Apter Power

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