Bently Nevada 350500-00-00-00-11-00 Charge Amplifier – 3500 Series

Bently Nevada 350500-00-00-00-11-00 — Piezoelectric Charge Amplifier for 3500 Series Machinery Protection Systems

The 350500-00-00-00-11-00 is a dedicated charge amplifier module designed to operate within Bently Nevada’s 3500 Series Machinery Protection System rack architecture. Its primary function in the control loop is to accept the high-impedance charge output from piezoelectric dynamic pressure transducers and convert it into a low-impedance, calibrated voltage signal that the downstream 3500 monitor modules can process with deterministic accuracy. Without this conditioning stage, the raw piezoelectric charge — typically in the picocoulomb (pC) range — would be susceptible to cable capacitance loading, ground-loop interference, and signal attenuation over long cable runs, all of which degrade measurement fidelity in critical rotating equipment protection applications.

In turbomachinery protection architectures, the charge amplifier sits at the first active stage of the signal chain. Its gain stability, input impedance characteristics, and frequency bandwidth directly govern the accuracy of combustion dynamics monitoring, cylinder pressure analysis in reciprocating compressors, and blade-pass pressure signature capture in axial compressors. The 350500-00-00-00-11-00 is engineered to maintain consistent transfer function characteristics across the full industrial operating temperature range, ensuring that alarm and trip setpoints remain valid without periodic recalibration under normal service conditions.

📩 Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

The internal architecture of the 350500-00-00-00-11-00 is structured around a charge-to-voltage conversion front end with a high-input-impedance operational amplifier stage. The input node is designed to present an impedance in the gigaohm range, which is essential for preserving charge integrity from piezoelectric sensors whose source impedance is inherently capacitive. Any resistive loading at this node would create a high-pass filter effect, attenuating low-frequency pressure components and introducing phase error into the measurement.

The module’s EMC design addresses two primary interference vectors common in industrial machinery environments: conducted interference from variable-frequency drives (VFDs) and radiated interference from high-current bus bars and motor windings. The input stage incorporates differential signal reception with common-mode rejection, suppressing noise that couples equally onto both signal conductors. Internal shielding between the analog signal path and the backplane digital communication circuitry prevents clock harmonics from the 3500 rack’s internal bus from injecting into the measurement chain.

Gain stability is maintained through precision thin-film resistor networks with low temperature coefficients (typically <25 ppm/°C), ensuring that the amplifier’s transfer function does not drift measurably across the −20 °C to +65 °C operating range. This is particularly relevant in outdoor compressor stations and turbine enclosures where ambient temperature swings of 40–50 °C are routine across seasonal cycles.

The backplane interface logic implements a handshake protocol with the 3500 rack’s communication controller, allowing the monitor module to verify module presence, read configuration parameters, and flag fault conditions — including open-input detection — without interrupting the measurement signal path. This non-intrusive diagnostics architecture is a key design feature that supports online module health verification without requiring a process shutdown.

System Integration Benefits

• Zero-modification rack installation — The 350500-00-00-00-11-00 occupies a standard 3500 rack slot with no additional wiring adapters, terminal block modifications, or firmware updates required for basic operation, reducing commissioning time to under 30 minutes for experienced technicians.
• Deterministic signal latency — The charge amplifier’s analog signal path introduces a fixed, predictable group delay, ensuring that the 3500 monitor module’s alarm response time calculations remain accurate and that trip setpoint response meets API 670 timing requirements.
• Diagnostic transparency via System 1 — Module status, input signal level, and fault flags are accessible through Bently Nevada’s System 1 software, enabling remote condition assessment without physical access to the rack cabinet.
• Scalable multi-channel architecture — Multiple 350500-00-00-00-11-00 modules can be installed in a single 3500 rack to monitor several dynamic pressure measurement points simultaneously, with each channel maintaining electrical isolation from adjacent channels to prevent cross-channel interference.
• API 670 compliance for insurance and regulatory acceptance — Facilities operating under insurance underwriter requirements or jurisdictional machinery protection mandates can document compliance using the module’s OEM certification, avoiding costly third-party validation testing.
• Compatibility with existing transducer wiring infrastructure — The module accepts standard coaxial or shielded twisted-pair cable configurations used with Bently Nevada-compatible piezoelectric transducers, eliminating cable replacement costs during upgrades from legacy monitoring systems.
• Reduced spare parts inventory complexity — A single module part number covers multiple dynamic pressure monitoring applications within the 3500 platform, allowing maintenance teams to maintain a minimal critical-spare inventory without application-specific variants.
• Fault isolation at the module level — Open-circuit and short-circuit input conditions are detected and flagged at the module level, allowing maintenance personnel to isolate faults to the transducer cable or sensor without removing the module from service or interrupting adjacent monitoring channels.

Quality Assurance & Global Logistics

Every 350500-00-00-00-11-00 unit supplied by siemensplc.com is sourced as genuine Bently Nevada OEM hardware. Units are procured through verified industrial distribution channels and are subject to pre-shipment inspection covering physical condition assessment, label and part number verification, and functional continuity checks. Inspection records and a certificate of conformance are available upon request for quality documentation requirements.

Shipments are dispatched from our Xiamen, China operations center using express freight carriers including DHL Express, FedEx International Priority, and SF Express International. Standard dispatch lead time for in-stock units is 3–5 business days from order confirmation. Tracking information is provided within 24 hours of dispatch. For time-critical procurement requirements, same-day dispatch arrangements are available upon prior coordination.

Export documentation — including commercial invoice, packing list, and certificate of origin — is prepared in compliance with applicable customs regulations for the destination country. HS code classification and export control screening are completed for each shipment. All units are packed in anti-static ESD-safe bags with foam-cushioned outer cartons rated for international air freight handling.

A 12-month warranty covers defects in materials and workmanship from the date of shipment. Warranty claims are processed with a target response time of 2 business days. Replacement or credit options are available based on failure analysis findings.

Contact Information

📧 Email: [email protected]
📱 WhatsApp: +86 18359268345
🌐 Web: siemensplc.com
📍 Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.