3500/72M 176449-08 is the front Recip Rod Position Monitor spare for the Bently Nevada 3500 rack. It conditions proximity-transducer signals and supports protection measurements tailored to reciprocating compressors.

Channel pairs can be assigned different monitoring functions, allowing one module to serve the machine arrangement defined in the controlled rack configuration.

• Programmable channel pairs support two monitoring functions in the same module.
• Dynamic and static position processing provides machine information for protection and condition assessment.
• Front buffered connections support signal verification without disturbing the permanent field wiring.
• Alert and danger logic can be configured around the active measured values.

• Match the front monitor with 140471-01 internal-termination, 140482-01 external-termination or the documented barrier I/O arrangement.
• Use compatible Bently Nevada proximity-transducer systems and preserve the Keyphasor or crank-angle references required by the chosen functions.
• Keep external termination blocks and cables paired with the selected rear I/O option.

• Save channel functions, sensor scales, alarm settings, machine-speed ranges and relay mapping before exchange.
• Record the rear I/O part number because the front monitor alone does not define the complete field interface.
• Commission every channel pair and repeat the plant-approved protective-function test before returning the compressor to service.