I. Core Parameters

1. Measurement and Display

Measurement Range: 0 - 9999 rpm (4-digit LED)

Accuracy: ±1 rpm (full scale)

Resolution: 1 rpm

Update Rate: Approximately 1 time/second

Display: Red LED, 7-segment digital tube

2. Input Signal

Signal Type: Phase angle / Rotational speed pulse (square wave / sine wave)

Input Frequency: 0 - 10 kHz

Input Voltage: Minimum 0.5 Vpp, Maximum 30 Vpp

Sensor Power Supply: Internal provides **+12 VDC/20 mA**, can directly drive eddy current / magneto-electric probes

Pulse Count: Programmable from 1 to 99 pulses per revolution (default 1 pulse/revolution)

3. Electrical

Power Supply: 110/220 VAC ±10%, 50/60 Hz; or 24 VDC (optional)

Power Consumption: ≤15 VA

4. Mechanical

Installation: Panel embedded (standard 19-inch half-height)

Opening Size: 133 mm × 81 mm

Overall Size: 144 mm × 88 mm × 100 mm (depth)

Weight: Approximately 0.9 kg (2.2 lbs)

Protection: Front panel IP54

5. Environment

Operating Temperature: 0 - 50 °C

Storage Temperature: -20 - +70 °C

Vibration: 10 g (10 - 1000 Hz)

II. Function Features

Independent Display: Independent of DCS/PLC, local direct reading

Signal Parallelism: Can be paralleled with TSI protection system rotational speed input without affecting the protection circuit

Wide Compatibility: Compatible with Bently 3300/3500 system probes and third-party magneto / Hall sensors

No Alarm: Pure display type, no relay output (requires 37507 series for alarm)

III. Model Suffix Explanation

37506‑A‑01: Standard type, 110/220 VAC

37506‑A‑05: 24 VDC power supply

37506‑B‑01: With 4-20 mA transducer output