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3500/77M 176449-07

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Bently Nevada 3500/77M 176449-07 is a Bently Nevada 3500/77M four-channel reciprocating-compressor cylinder pressure monitor identified by spare part 176449-07.
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Technical specifications for 3500/77M 176449-07

  • Manufacturer:
    Bently Nevada
  • Part Number:
    3500/77M 176449-07
  • Product Family:
    3500 System
  • Product Type:
    3500/77M Four-Channel Reciprocating Cylinder Pressure Monitor
  • Stock:
    1
  • Input channels:
    4
  • Input impedance:
    50 kΩ
  • Power consumption:
    7.8 W with transducer supplies at full load
  • Buffered outputs:
    One short-circuit-protected coaxial output per channel
  • Buffered-output impedance:
    550 Ω
  • Transducer supply:
    +23.0 ±0.8 VDC, 24.5 mA current limit per channel
  • Operating temperature:
    -30 to 65°C
  • Storage temperature:
    -40 to 85°C
  • Humidity:
    95%, non-condensing
  • Rack space:
    1 full-height front slot
  • Minimum standard machine speed:
    60 rpm
  • Low-speed option:
    Modification 135M8200-01 for operation down to 30 rpm
  • Required firmware:
    3500/77M Revision L or later
  • Required rack software:
    3500/01 v3.00; 3500/02 v2.30; 3500/03 v1.30 or later
  • Dimensions:
    2.44 × 24.13 × 24.18 cm
  • Weight:
    0.91 kg
  • Tariff Code:
    9031809090
  • 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 Pressure Inputs Compressor Variables Rack Integration Application
  • Accepts four supported cylinder-pressure channels
  • Calculates suction, discharge, minimum and maximum pressure
  • Occupies one full-height front slot in the 3500 rack

Bently Nevada 3500/77M 176449-07 is a Bently Nevada 3500/77M four-channel reciprocating-compressor cylinder pressure monitor identified by spare part 176449-07.

It conditions cylinder-pressure signals, calculates compressor pressure and rod-load variables, and compares configured values with Alert and Danger setpoints in a 3500 rack.

Before installation or replacement, verify the selected internal- or external-termination I/O module, approved pressure transducers, firmware and rack-software revisions, Keyphasor or multi-event reference, channel scaling, machine speed and alarm logic.

Availability, condition, price, and shipping time for 3500/77M 176449-07 are confirmed during quotation.

Bently Nevada 3500/77M 176449-07 Manuals, Datasheets, Links

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.

  • Accepts four supported cylinder-pressure channels
  • Match each channel to the approved transducer and I/O termination
  • Confirm polarity, scaling and transducer supply before calibration
  • Calculates suction, discharge, minimum and maximum pressure
  • Provides compression-ratio and rod-load variables
  • Requires a verified crank-angle reference for phase-related results
  • Occupies one full-height front slot in the 3500 rack
  • Match internal and external termination hardware correctly
  • Maintain required module firmware and rack-software revisions
  • Protecting reciprocating compressors with cylinder-pressure alarms
  • Calculating compression ratio, rod load and rod reversal from pressure data
  • Supporting compressor valve, ring and cylinder performance diagnostics
Description
3500/77M 176449-07 is a Bently Nevada four-channel reciprocating cylinder pressure monitor for a 3500 machinery protection rack.

The monitor occupies one rack slot, has a maximum power consumption of 7.8 W, measures 2.44 × 24.13 × 24.18 cm and weighs 0.91 kg.

Before replacement, verify the rack slot, associated I/O module, transducer type, channel configuration, cylinder geometry, phase reference, firmware and configuration-software compatibility.
Alternative Names
3500/77M 176449-07 3500-77M 176449-07 3500/77M176449-07 350077M17644907 Bently Nevada 3500/77M 176449-07
Technical notes
Bently Nevada 3500/77M 176449-07 requires a matching cylinder-pressure I/O module and approved transducers. Record compressor geometry and phase reference as carefully as pressure scaling.
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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.
Does Bently Nevada 3500/77M 176449-07 include the rear I/O module and pressure transducers?
No. Part number 176449-07 identifies only the main 3500/77M Cylinder Pressure Monitor. The rear internal- or external-termination I/O module, external termination blocks and cables, and approved pressure transducers have separate part numbers and are not included unless explicitly listed in the quotation.
What must be saved before replacing Bently Nevada 3500/77M 176449-07?
Export the rack configuration and record channel transducer type, pressure range, crank reference, machine geometry, alarm setpoints, voting or relay logic, bypass state and active diagnostic events.
Why can Bently Nevada 3500/77M 176449-07 display pressure but calculate incorrect rod load?
Pressure scaling alone is not enough. Verify cylinder bore, rod diameter, crank-angle reference, channel phase, suction/discharge assignment and machine geometry used by the configuration.
Can Bently Nevada 3500/77M 176449-07 use any industrial pressure transmitter?
No. Use a Bently-approved pressure transducer and the matching I/O termination arrangement. Confirm supply, signal range, connector, hazardous-area approval and dynamic response.
Why can buffered outputs from Bently Nevada 3500/77M 176449-07 appear inverted or offset?
With the cylinder-pressure I/O module the front buffered outputs are intentionally inverted and offset by -2.265 VDC. The connected analyzer must account for that documented behavior.
What should be checked when Bently Nevada 3500/77M 176449-07 is used below 60 rpm?
The standard product has a 60 rpm lower limit. Operation down to 30 rpm requires the specified low-speed modification plus confirmation of phase reference quality and configuration support.
How should Bently Nevada 3500/77M 176449-07 be validated after installation?
Apply known pressure references, verify crank phase and every calculated variable, compare buffered outputs, test Alert and Danger paths without tripping production unexpectedly, and confirm bypass and power-cycle recovery.

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