Bently Nevada 3500/77M 143729-01 Internal-Termination Cylinder Pressure I/O Module
The internal-termination rear I/O module for approved positive-voltage cylinder-pressure transducers in a 3500/77M system.
Overview
3500/77M 143729-01 is the rear I/O module that terminates approved third-party cylinder-pressure transducers inside the 3500 rack. It operates with the corresponding 3500/77M front monitor and is not the external-termination version.
The internal Euro-style connector headers and rack wiring should be inspected together when preparing a replacement.
Specs
| Manufacturer | Bently Nevada, a Baker Hughes business |
|---|---|
| Complete Identification | 3500/77M 143729-01 |
| Product Family | 3500/77M Recip Cylinder Pressure Monitor |
| Module Role | Rear cylinder-pressure I/O |
| Termination Method | Internal termination |
| Input Source | Bently-approved third-party positive-voltage pressure transducers |
| Compatible Front Monitor | 3500/77M cylinder-pressure monitor |
| Connector Header Options | 00580434 eight-pin and 00580441 three-pin Euro-style headers |
| Operating Temperature | −30 to +65 °C |
| Storage Temperature | −40 to +85 °C |
| Humidity | 95% non-condensing |
Features
- Internal rack-side field termination for cylinder-pressure channels.
- Supports the approved positive-voltage pressure-transducer signal path.
- Rear-slot alignment with the matching 3500/77M front monitor.
- Separately identified connector headers for service planning.
Applications
- Reciprocating-compressor protection racks using internal field termination.
- Maintenance of a documented 3500/77M installation without external terminal blocks.
- Spare preparation where sensor range, rack slot and internal wiring are already recorded.
Lifecycle
- Label each conductor and photograph connector positions before removing the rear module.
- Confirm the pressure-transducer range and its approved relationship to the monitor.
- Inspect reusable connector headers for damage or loose conductors.
- Perform channel checks and alarm validation after the replacement.
FAQ
How does 3500/77M 143729-01 differ from 143737-01?
3500/77M 143729-01 uses internal rack terminations; 143737-01 is designed for external termination hardware.
Does 3500/77M 143729-01 include the front monitor?
No. It is the rear I/O module and must be paired with the corresponding front monitor.
Which connector headers are associated with 3500/77M 143729-01?
The datasheet lists 00580434 eight-pin and 00580441 three-pin Euro-style headers.
Can any pressure transmitter be wired to 3500/77M 143729-01?
No. Use a Bently-approved positive-voltage transducer with the documented range and supply requirements.
What records are needed to order 3500/77M 143729-01 safely?
Provide the front-monitor identity, rack slot, sensor part numbers, pressure ranges and internal wiring photographs.
What should be tested after installing 3500/77M 143729-01?
Check channel status, pressure scaling, transducer supply, alarm processing and rack communications.
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