3500/50 133388-02 2-channel speed monitoring module

The BENTLY 3500/50 133388-02 is a 2-channel speed monitoring module belonging to Bently Nevada’s 3500 Series Rotating Machinery Protection & Monitoring System. It is specifically engineered to measure and monitor key rotational parameters (shaft speed, rotor acceleration, rotation direction) of critical rotating equipment, providing real-time data, programmable alarms, and safety triggers to prevent overspeed, under-speed, or abnormal acceleration-related failures. The part number 133388-02 denotes a standardized configuration optimized for industrial scenarios requiring reliable dual-channel speed monitoring with compatibility for common proximity/magnetic sensors. Below is its comprehensive detailed information:

I. Core Technical Parameters

Category	Specific Specifications
Basic Identification	- Model: 3500/50 (2-Channel Speed Monitor)- Part Number: 133388-02- Applicable System: Bently 3500 Series (compatible with 3500/10 single-frame and 3500/20 multi-frame racks)- Channel Quantity: 2 independent, isolated monitoring channels
Speed Measurement	- Measurement Range: 0.1 rpm to 99,999 rpm (software-configurable)- Accuracy:- ±0.1 rpm (for speeds < 100 rpm)- ±0.01% of reading (for speeds ≥ 100 rpm)- Resolution: 0.01 rpm- Input Events per Revolution: 1 to 255 (programmable, matching gear teeth, shaft markers, or encoder pulses)
Acceleration & Direction	- Acceleration Range: -10,000 rpm/s to +10,000 rpm/s (deceleration to acceleration)- Acceleration Accuracy: ±0.5% of full scale- Rotation Direction Detection: Supports clockwise (CW)/counterclockwise (CCW) identification (via phase difference of dual-sensor inputs)
Input Compatibility	- Sensor Type: Proximity probes (e.g., Bently 3300XL eddy current probes) or magnetic pickups- Input Signal Range: +10 V to -24 V DC- Input Impedance: 20 kΩ (standard), 40 kΩ (TMR thermistor option)- Minimum Input Frequency: 0.0167 Hz (for proximity probes), 3.3 Hz (for magnetic pickups)
Output Configuration	- Relay Outputs: 4 Form C (SPDT) relays (2 per channel; configurable for Warning/Danger/Acceleration/Reverse Direction alarms)- Analog Outputs: 2 channels of 4-20 mA DC (1 per channel, proportional to speed/acceleration; full-scale range programmable)- Buffered Sensor Outputs: 2 channels (1:1 signal replication for external data logging/analysis), output impedance 550 Ω