3500/42M 128229-01 is a Bently Nevada 3500/42M Proximitor/Seismic I/O Module with internal terminations. It provides the rear signal interface for the four-channel monitor and its supported proximity or seismic transducer inputs.

Field conductors terminate at the rack-side module, keeping the complete signal interface within the 3500 rack assembly.

• Provides the internal termination interface for four 3500/42M measurement channels.
• Accepts the transducer connections supported by the paired Proximitor/Seismic Monitor.
• Keeps channel wiring aligned with the measurement functions configured in channel pairs.
• Places terminal points directly at the rear of the rack.
• Maintains a dedicated rear-module relationship with the associated front monitor.

• 3500/42M 128229-01 is intended for the Bently Nevada 3500/42M four-channel Proximitor/Seismic Monitor.
• Seismoprobe is the primary intended transducer; other supported sensor types require measurement-application review.
• The configured measurement function, transducer scale and signal polarity must match the rack configuration.
• Do not attach an external termination block to this internal-termination module.
• Confirm rack slot, monitor revision and field connector arrangement before installation.

• Retain the full 3500/42M 128229-01 part number and its internal termination definition.
• Document all four channel assignments, transducer types and measurement functions before removal.
• Transfer field conductors only after recording every rack terminal position.
• Restore the saved rack configuration without changing ranges or alarm setpoints unintentionally.
• Verify channel OK status, measured values and alarm behavior before returning protection to service.