I. Model Analysis (7 Segmented Codes)

72301: 7200 Series, 4-channel vibration/ displacement monitoring card (RVXY-II type)

-04: Number of channels / Function combination (4 channels, configurable as vibration/ displacement)

-04: Range code (such as ±2 mm or ±80 mil, suitable for conventional shaft displacement)

-02: Sensitivity (7.874 V/mm = 200 mV/mil, standard eddy current probe)

-01: Output type (4–20 mA analog + relay alarm)

-01: Alarm configuration (2-level alarm: warning / danger)

-15: Hardware version / compatible rack (7200 standard rack, good compatibility)

II. Core Functions

4 independent inputs: Connect 3300XL series 5/8/11 mm eddy current probes

Monitoring parameters: Shaft vibration (peak-to-peak), shaft displacement / thrust, temperature difference, eccentricity, phase difference

Alarm protection: 2-level relays per channel (warning / danger), can be interlocked for shutdown

Signal output: 4–20 mA per channel, direct connection to DCS/PLC; supports RS-485 communication

Configuration flexibility: Set range, alarm values, filtering through 7200 rack software III. Technical Specifications

Power Supply: 24 VDC (backplane power supply, power consumption approximately 15 W)

Accuracy: ±0.5% FS, temperature drift ≤ 0.01%/℃

Frequency Response: 10 Hz～10 kHz (covering the fault frequencies of rotating machinery)

Operating Temperature: 0 ℃～+60 ℃; Storage: −40 ℃～+85 ℃

Size: Standard 7200 rack full-height card (approximately 220×120×30 mm)

Protection: Industrial-grade reinforcement, vibration-resistant (5 g), EMI-resistant

IV. Typical Applications

Electricity: Steam turbines, gas turbines, generators (shaft vibration / thrust monitoring)

Petroleum: Centrifugal compressors, large pumps, fans (shaft displacement / expansion protection)

Metallurgy: High-speed rolling mills, motors (eccentricity / vibration monitoring)

V. Installation and Wiring

Insert into the full-height slot of the 7200 rack, lock the clamping mechanism

Probe → Extension cable → Preamplifier → Module channel input end

Alarm output connected to the interlock circuit; 4–20 mA connected to the DCS analog input

Configuration: Set the range, alarm value, filtering parameters, and save as effective

VI. Maintenance Points

Daily: Observe the panel LED (power / alarm / communication)

Regularly: Tighten the terminals every 6 months, calibrate the probe gap, test the alarm

Fault: Check the power supply / probe / cable for no data; re-calibrate the gap / ground for drift; check the alarm anomaly for threshold verification