The BENTLY 3500/22M 288055-01 is a dual-channel monitoring module under the Bently 3500 Machinery Protection System. Its core function is to perform real-time monitoring and fault early warning on key operating parameters of industrial rotating machinery, such as shaft vibration and shaft displacement, and it is suitable for high-precision monitoring scenarios.

I. Core Parameters

Basic Specifications: Dual-channel design, compatible with Series 3300 eddy current/velocity sensors, with 2 independent analog input channels;

Measurement Capability: Shaft vibration range of 0-2000 μm (peak-to-peak), shaft displacement range of 0-5000 μm (full scale); measurement accuracy of ±0.1% full scale (at 25°C), and displacement resolution of 0.01 μm;

Output & Communication: 2 channels of 4-20mA analog output (for connection to DCS/PLC); supports 3500 system internal bus, and requires an additional gateway for Modbus RTU compatibility; no built-in relays, so a 3500/32 module is needed to enable alarm/shutdown functions;

Environment & Power Supply: Operating temperature of 0-60°C (no condensation), storage temperature of -40-85°C, humidity of 5%-95% RH (non-condensing); power supply of +24V DC (±10%), maximum full-load power consumption of ≤5W;

Certifications & Dimensions: Certified to UL 508 and CSA C22.2 No.14 standards, EMC compliant with EN 61000 standards; dimensions of 101.6×165.1×25.4mm, weight of approximately 150g (fits 3500 frame).

II. Typical Application Scenarios

Power Industry: Monitors shaft vibration/displacement of steam turbine generators and coal mills to prevent blade wear and rubbing between rotating and stationary components;

Petrochemical Industry: Monitors parameters of centrifugal compressors and oil transfer pumps, provides early warning of shaft imbalance and bearing wear, and prevents production interruptions;

Metallurgical Industry: Ensures the precision of rolling mill drive systems (reducing steel plate deviation) and the safety of blast furnace blower bearings;

Rail Transit/Marine Industry: Provides real-time status feedback for train traction motors and marine propulsion systems, with resistance to high salt spray and high-load interference;

General Industry: Monitors vibration of large motors and gearboxes, and detects early signs of gear wear and tooth breakage.

III. Operating Principle

Signal Acquisition: Eddy current sensors (for displacement measurement) convert rotor clearance into 0-10V DC signals, while velocity/acceleration sensors (for vibration measurement) output AC signals; these signals are fed into the 2 respective channels;

Signal Processing: Hardware + software filtering is used to eliminate interference, weak signals are amplified, and calibration coefficients are applied to offset temperature drift/sensor drift, ensuring measurement accuracy;

Data Output & Early Warning: 4-20mA signals are transmitted to DCS/PLC; meanwhile, data is sent to the 3500/20 display module via the system bus, and audible and visual alarms are triggered when thresholds are exceeded;

Fault Protection: When parameters reach dangerous thresholds, the module links with the 3500/32 relay module to trigger emergency equipment shutdown, and simultaneously records fault data for subsequent traceability.
 

Main products:

Covering globally renowned brands:

Bently Nevada, Triconex, Woodward, Foxboro, Westinghouse, Reliance, Schneider Modicon, ABB, Allen-Bradley, Motorola, GE Fanuc, Yaskawa, Bosch Rexroth, ACSO, Yokogawa, Rexroth, NI, ICS Triplex, Kollmorgen, Mitsubishi, MOOG, Emerson, B&R, Alstom, EPRO, HIMA, Honeywell, Prosoft, AMAT, Siemens, etc.

Product categories include: DCS system accessories, robot system spare parts, large servo system spare parts, etc., widely used in power, chemical, metallurgy, intelligent manufacturing and other fields.