Bently Nevada 3500/77M 143737-01 External-Termination Cylinder Pressure I/O Module
The external-termination rear I/O module for approved cylinder-pressure transducers in a 3500/77M monitoring system.
Product Profile
3500/77M 143737-01 is the external-termination I/O module for the 3500/77M cylinder-pressure monitor. It carries transducer signals between the rack and a separately mounted termination block through the specified interconnect cable.
This version is selected when field conductors terminate outside the rack; it should not be confused with internal-I/O part 143729-01.
Technical Data
| Manufacturer | Bently Nevada, a Baker Hughes business |
|---|---|
| Complete Identification | 3500/77M 143737-01 |
| Product Family | 3500/77M Recip Cylinder Pressure Monitor |
| Module Role | Rear cylinder-pressure I/O |
| Termination Method | External termination |
| Input Source | Bently-approved third-party positive-voltage pressure transducers |
| External Block, Euro Style | 125808-10 |
| External Block, Terminal Strip | 128015-10 |
| Interconnect Cable Family | 129525-AAAA-BB |
| Available Cable Lengths | 1.5, 2.1, 3, 7.5, 15 or 30.5 m |
| Compatible Front Monitor | 3500/77M cylinder-pressure monitor |
System Role
- Moves field termination to a dedicated remote terminal block.
- Supports either Euro-style or terminal-strip external blocks.
- Uses a defined 3500 transducer-signal cable between rack and block.
- Maintains the approved positive-voltage pressure-transducer signal path.
Compatibility
- Use with the corresponding 3500/77M front monitor, supported external block and 129525 cable.
- Do not replace with 143729-01 unless field termination is redesigned inside the rack.
- Match cable length and factory-assembly option to the installed route.
Applications
- Reciprocating-compressor racks that require field termination outside the 3500 chassis.
- Maintenance of installations using 125808-10 or 128015-10 terminal blocks.
- Projects where cable length and assembly option are documented in the 129525 code.
FAQ
What extra hardware is required with 3500/77M 143737-01?
Use the specified external terminal block and a compatible 129525 transducer-signal cable.
How does 3500/77M 143737-01 differ from 143729-01?
3500/77M 143737-01 uses external termination, while 143729-01 terminates field wiring inside the rack.
Which external blocks work with 3500/77M 143737-01?
The datasheet lists 125808-10 Euro-style and 128015-10 terminal-strip blocks.
What cable lengths are available for 3500/77M 143737-01?
The 129525 family lists 1.5, 2.1, 3, 7.5, 15 and 30.5 metre choices.
Can 3500/77M 143737-01 accept any pressure transmitter?
No. Confirm a Bently-approved positive-voltage transducer and the correct pressure range.
What should be tested after installing 3500/77M 143737-01?
Check continuity, shielding, transducer supply, channel zero and span, alarms and rack communication.
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