1. Input Parameters
Input Type: IEPE (Integrated Electronics Piezoelectric) accelerometer input, Eddy current proximity probe input
Input Voltage Range: ±5 V pk-pk (for accelerometer); 0 – 20 V DC (for proximity probe)
Input Impedance: ≥ 10 MΩ (for voltage input); 50 Ω (for proximity probe input)
Sensor Compatibility: Compatible with Bently 3300 XL, 3301 XL series proximity probes and accelerometers
2. Output Parameters
Analog Output: 4 channels of 4 – 20 mA current output (corresponding to measured vibration values), Load Resistance: 0 – 500 Ω
Digital Output: 4 channels of SPDT (Single Pole Double Throw) relay outputs, Contact Rating: 2 A @ 250 V AC / 30 V DC
Status Output: LED indicators for power, channel status (normal/alarm), communication status
3. Application Scenarios
The Bently 3500/33 is a key module in the 3500 machinery protection system, widely used in the monitoring and protection of rotating machinery in various industrial fields, including:
– Power Industry: Steam turbines, gas turbines, generators in thermal power plants, hydropower plants, and nuclear power plants
– Petroleum & Chemical Industry: Centrifugal compressors, reciprocating compressors, pumps, and fans in refineries and chemical plants
– Metallurgical Industry: Rolling mill motors, blast furnace blowers, and converter exhaust fans in steel plants
– Mining & Cement Industry: Grinding mill drives, conveyor belt motors, and air compressors
– Marine Industry: Main engines, auxiliary engines, and propeller shafts of ships
Its main function is to real-time monitor vibration parameters (displacement, velocity) of rotating machinery, issue alarm signals or trigger shutdown protection when parameters exceed the set threshold, ensuring the safe and stable operation of equipment.
3500/33 Bently Relay Module PDF
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