Description

Bently Nevada 3500/40M Part Number 135489-04 Four-channel Eddy Current Displacement Monitoring Module

3500/40M module front view Basic Information
Brand: Bently Nevada (owned by Baker Hughes, a leader in turbine system TSI / protection systems)
Model: 3500/40M Proximitor Monitor (SIL compliant front-end monitor card)
Original factory part number: 135489-04 (standard model with internal terminals, without explosion-proof safety barrier)
Compatible system: 3500 full series rack-mounted unit protection monitoring system
Stock warranty: New original 12-month warranty, shipment within 3 working days upon payment
Standards: API 670, IEC 61508 SIL2 mechanical safety certification
1. Core hardware specifications
Channel configuration
Independent 4-channel coaxial BNC input, each channel can be independently configured, supporting pairs of X/Y orthogonal axes; each channel comes with short-circuit protection
Compatible sensors
Special matching 3300 XL 8mm/11mm series eddy current probes + front-end monitor, receiving -24VDC differential signal of eddy current sensors
Measurement types (software configurable)
Radial shaft vibration (peak-to-peak μm)
Axial thrust and shaft displacement
Rotor differential expansion, shaft eccentricity
REBAM bearing metal wear monitoring
Electrical performance

Signal bandwidth: 0.7Hz ~ 10kHz, built-in anti-aliasing filter, suppressing high-frequency interference from gears and frequency converters
ADC accuracy: 24-bit Δ-Σ analog-to-digital conversion, full-scale error ≤ ±0.5%
Standard sensitivity: 7.87 mV/μm (200mV/mil), 3.94 mV/μm (100mV/mil) (software selectable)
Power consumption: typical 7.7W, unified power supply from the rack backplane
Channel isolation: channel – backplane withstand voltage > 500VDC, eliminating ground loop interference
Alarm logic
Each channel has two independent programmable thresholds: Alert (pre-warning) + Danger (emergency shutdown); danger values can be linked to 3500 system relay output to trigger ESD trip protection of the unit
Panel indicator lights
OK (module normal), TX/RX (backplane communication), Bypass (channel bypass), 4-channel fault indicator lights (probe disconnection, gap over-limit, abnormal signal direct display)
II. Environmental and Mechanical Parameters
Operating Temperature: -30℃ ~ +65℃ (without safety barrier version); With internal safety barrier model: 0~+65℃
Storage Temperature: -40℃ ~ +85℃, humidity 0~95% RH (no condensation)
Dimensions: 241.3×24.4×163.1mm, weight approximately 0.46kg
Installation: Hot-swappable in 3500 rack standard slots, can replace a single card without stopping the entire machine or power-off
Backplane Communication: High-speed parallel backplane bus, exchanges data with 3500/22M communication gateway and 3500/92 interface card