Sensonics SENTRY Machine Protection Unit - Intelligent Embedded Machine Monitoring and Protection System

Sensonics SENTRY Machine Protection Unit - The Sensonics SENTRY condition monitoring and machine protection system has been developed based on the highest operational safety and most flexible task-specific configurability. During installation, thanks to the versatility of the intelligent (microprocessor-based) modules, the system can be configured to meet the requirements of even the most unique tasks, providing exceptionally high reliability in ensuring the complete protection of rotating machinery and equipment. The virtually maintenance-free system performs continuous self-checks on each channel and the attached measuring circuits for safety. The Sensonics SENTRY system can be applied to any type of rotating machinery, such as electric motors, pumps, fans, turbines, generators, compressors, mills, grinders, mixers.

• modular, configurable, flexible system structure
• applicable to all types and designs of rotating machinery
• protection system compliant with API 670 and GDCD96 standards
• display of vibration, temperature, and other parameters
• microprocessor-based, independent channel modules
• configurable from a computer or the front panel keyboard
• data display per channel with bar display and digital values
• indication, alarms, and status indicators per channel with LEDs
• two adjustable time-delayed alarm relays per channel
• continuous module and sensor monitoring per channel
• remote control functions, such as external alarm acknowledgment
• analog outputs per channel for analysis and archiving
• serial (RS232-type) interface for networking per module

The Sensonics SENTRY system has a modular structure. Each channel module is completely independent, galvanically isolated, equipped with its own power supply, its own Intel microprocessor, preamplifier corresponding to the attached sensor or process signal, sensor power supply or signal conditioning, analog and relay outputs, as well as front-facing bar display, indicator LEDs, digital display, and control buttons. There are channel modules for receiving vibration, displacement, temperature, speed, and other process signals, as well as special - capable of performing complex operations - multi-input measuring/evaluating modules.

System Components (Measuring and Display Modules)

• receives signals from two vibration acceleration or velocity sensors
• processing/display in acceleration, velocity, or displacement
• adjustable sensitivity according to the attached sensor
• adjustable pre-alarm and alarm with or without time delay
• self-check with module and circuit fault indication
• user-defined scaling for analog output

• receives signal from eddy current axis vibration sensor
• peak, peak-peak, or RMS processing/display
• configurable fixed-range or frequency-tracking filters
• adjustable sensitivity according to the attached sensor
• gap alarm
• shutdown alarm
• self-check with module and circuit fault indication

• receives signals from two eddy current shaft position sensors
• adjustable dual positive and negative alarm levels
• adjustable signal range and zero adjustment
• indication and alarm outside measurement range
• adjustable sensitivity according to the attached sensor
• self-check with module and circuit fault indication

• receives signals from two eddy current shaft position sensors
• averaging or continuous point display
• adjustable dual alarm levels
• indication and alarm outside measurement range
• adjustable zero adjustment
• shaft vibration display
• Self-check with error notification

• Accepts signals from resistance thermometers or thermocouples
• Digital display or round-robin interrogation for each channel
• On-site adjustable signal scaling (e.g. °C or °F)
• Two-channel version also available
• Self-check with error notification

• Accepts signals from two eddy current displacement sensors
• Reverse rotation alert
• Self-check with error notification

• Accepts signal from one eddy current displacement sensor
• Dual-mode peak and effective value-based signal analysis with automatic switching between low and high speed rotation for speed
• Gaps alert
• Stop alert
• Self-check with error notification

• Accepts signal from eddy current sensor or TTL pulses
• Adjustable alert values (e.g. for overspeed protection)
• Adjustable speed range
• Self-check and measurement loop monitoring with error notification

• Accepts signals from differential transformer displacement sensors
• Adjustable dual positive and negative alert levels
• Adjustable signal range and unit of measurement
• Scaling in English or metric units
• Self-check on the module and measurement loop with error notification
• Scalable analog signal outputs

• Accepts signal from eddy current displacement sensor
• TTL or other pulse-shaped output
• Stop alert and calibration check
• Self-check with error notification

Scalability

• max. 6 channel modules

• max. 3 channel modules