Bently 135137-01 45小卡 4‑Channel Position Rear I/O Small Card with Internal Terminations for 3500‑45 Position Monitor

Description

Hardware Specifications

• Part Type: Rear I/O small card, must work with matched 3500‑45 front monitor module, cannot operate independently
• Mounting: Installed on rear slot position of 3500‑05 rack, front‑rear separated architecture
• Termination: On‑board built‑in wiring terminals, no external terminal block required; supports 4‑channel transducer inputs for proximity probes, DC‑LVDT and RPT sensors
• PCB: Conformal‑coated multilayer printed circuit board for harsh industrial environments
• Mechanical: Standard 3500‑series rear small‑card form factor, net weight approx. 0.44 kg
• Environmental: Operating temperature ‑30 ℃ ~ +65 ℃; storage temperature ‑40 ℃ ~ +85 ℃; vibration and shock performance complies with API‑670 machinery protection standard
• Electrical: Non‑isolated signal routing; supplies proximitor negative‑18 V /‑24 V excitation power to field proximity probes; no on‑board signal‑processing microprocessor.

Core Functions

1. Acts as physical field‑wiring interface for the 3500‑45 position monitor, delivers transducer excitation power and routes 4‑channel displacement sensor signals to the paired front‑end processing module.
2. Supports thrust position, differential expansion, case expansion and valve‑position measurement configurations; all channel setup, sensitivity selection, alarm threshold configuration and diagnostic logic are completed by 3500‑45 front‑end module, this rear card only implements hardware‑level signal conduction and power distribution.
3. Receives inputs from proximity probes for thrust measurement, DC‑LVDT for case expansion and RPT for rotary‑position feedback.
4. No on‑board intelligence; all fault detection, sensor fault identification and alarm generation are executed by front‑end monitor module.
5. Critical for turbine‑protection applications, monitors axial thrust shift and thermal expansion to prevent rotor‑to‑stator rub events on steam turbines, gas turbines and centrifugal compressors.

Installation Requirements

1. Mandatory one‑to‑one slot matching with compatible 3500‑45 front‑end module. Mismatched part numbers will produce invalid readings, missing excitation power or complete channel failure.
2. Perform insertion‑removal under rack power‑off state. Although front modules support hot‑swap, rear I/O small‑card replacement shall be power‑cut to avoid transient excitation spikes that could damage field proximity probes.
3. Apply proper torque for field wiring terminals. Loose connections will lead to position reading drift, intermittent jumps and false machinery alarms.
4. Maintain sufficient cabinet ventilation. Avoid direct exposure to corrosive gas, oil mist and conductive dust to prevent PCB trace corrosion and terminal oxidation.
5. Inspect backplane connector pins before installation. Bent, contaminated or corroded pins may cause partial‑channel dropout or loss of transducer excitation power.