Bently Nevada 3500/70M_SIL2 reciprocating pulse/velocity monitoring module

Product Overview

Bently Nevada 3500/70M_SIL2 is a SIL2-certified reciprocating impulse and speed monitoring module for the Bently 3500 machinery protection system, serving as a core functional component of Turbine Supervisory Instrumentation (TSI) systems. Designed for reciprocating machinery and high-speed rotating units, it integrates four independent high-precision monitoring channels to synchronously collect impact acceleration, reciprocating acceleration, reciprocating velocity, low-frequency reciprocating velocity and rotational speed signals, realizing real-time continuous monitoring and over-limit protection of equipment vibration and operating speed.

With official SIL2 safety integrity level certification, the module meets strict redundancy and fault tolerance requirements of industrial safety instrumented systems, perfectly adapting to high-risk process scenarios in petrochemical, power and oil & gas industries. Equipped with programmable filtering algorithm and millisecond-level response mechanism, it supports multi-parameter linkage alarm and interlock output. It accurately identifies early equipment abnormalities including vibration deviation, speed fluctuation, rotor acceleration and reverse rotation, effectively avoiding unit abrasion, unplanned shutdown and equipment damage. It is an original core spare part for safety monitoring, interlock protection and system upgrading of large rotating and reciprocating mechanical equipment.

2. Technical Parameters

Parameter	Specification
Model Number	3500/70M_SIL2
Brand	Bently Nevada (Baker Hughes)
Safety Level	SIL 2 Safety Integrity Level Certified
Channel Configuration	4 independent programmable channels, paired configuration supported
Monitoring Parameters	Impact acceleration, reciprocating acceleration, reciprocating velocity, low-frequency reciprocating velocity, rotational speed
Speed Measurement Range	0 ~ 100000 RPM
Measurement Accuracy	±0.1 RPM, reading accuracy ±0.5%
Response Time	＜1 millisecond
Frequency Response	0.01Hz ~ 30kHz, programmable filter
Input Impedance	10kΩ (acceleration) / 1MΩ (velocity)
Sensor Power Supply	-22VDC, 40mA per channel
Alarm Output	4-channel dry contact relay output, programmable high/low limit
Communication Interface	RS232, RS485, Ethernet
Operating Temperature	-40℃ ~ +70℃ industrial wide temperature range
Operating Humidity	10%~95% non-condensing
Power Consumption	Typical 10W
Applicable System	Bently 3500 TSI machinery protection system
Origin	Original USA imported

3. Product Features

SIL2 High Safety Performance：Certified by authoritative SIL2 safety integrity standards, featuring complete fault tolerance, self-diagnosis and safety interlock functions, which greatly reduces safety risks of high-risk industrial units.
Multi-parameter High-precision Monitoring：Integrated multi-dimensional monitoring of vibration, acceleration, reciprocating velocity and rotational speed. Millisecond-level rapid response and high resolution capture subtle equipment abnormalities and realize early fault prediction.
4-channel Independent Programmable Design：Four channels support independent configuration or paired linkage, meeting synchronous multi-point and multi-parameter monitoring demands for various reciprocating and rotating units.
Powerful Signal Processing Capacity：Wide-range programmable filtering effectively filters on-site electromagnetic interference and mechanical clutter signals, ensuring stable, drift-free and error-free monitoring data under complex industrial conditions.
Complete Alarm & Interlock Logic：Supports multiple alarm strategies including high/low limit, speed band, zero speed, rotor acceleration and reverse rotation, realizing linkage system interlock shutdown to guarantee unit safety.
Excellent Industrial Environmental Adaptability：Wide operating temperature range, moisture resistance, vibration resistance and anti-interference capability ensure long-term stable continuous operation in harsh power plant, chemical and oil & gas working conditions.
High System Compatibility：Fully compatible with Bently 3500 rack system with plug-and-play and convenient configuration, ideal for old system replacement, faulty module substitution and safety level upgrading projects.