I. Model Code (3500/25 - AXX - BXX - CXX)

3500/25: Half-height dual-channel phase comparator module

A: Number of channels (01 = 1 module / 2 channels; 02 = 2 modules / 4 channels)

B: I/O type (01 = non-isolated; 04 = isolated)

C: Certification (00 = none; 01 = CSA/NRTL/C)

II. Core Parameters

1. Signal Input

Channels: 2 independent (half-height)

Input type: Eddy current probe, magnetic pickup

Voltage range: Non-isolated +0.8V ~ -21V; Isolated +5V ~ -11V

Frequency / Speed: 0.017Hz (1 RPM) ~ 20kHz (1,200,000 CPM)

Input impedance: ≤ 21.8kΩ

Trigger threshold: Automatic (≥ 2Vpp, ≥ 120RPM); Manual (0~20VDC, ≥ 1RPM)

2. Accuracy and Output

Phase accuracy: ±0.1°

Speed accuracy: ±0.05%

Buffer output: 2 channels, impedance 504Ω, -24VDC, 40mA / channel

TMR redundancy: Supports dual-module parallel operation, meeting triple redundancy application requirements

3. Electrical and Mechanical

Power supply: -24VDC (±10%), typical 3.2W

Size: 120×80×40mm (half-height, 19" rack 3U)

Weight: Approximately 0.46kg

Protection: IP65 (front panel)

4. Environment

Operating temperature: -40℃ ~ +70℃

Storage temperature: -40℃ ~ +85℃

Humidity: 5%–95% RH (no condensation)

III. Key Features

High-precision reference: Dual high-precision phase / speed, supporting vibration vector analysis

Half-height dual-channel: Saves rack space, single module with dual channels

Wide frequency range: Covers from extremely low speed to high-speed rotating machinery

Downward compatibility: Completely replaces the old version 3500/25, compatible with legacy rack

API 670 compliance: Standard for power / petrochemical industry

IV. Compatibility and Ordering

Matching sensors: 3300 XL eddy current probe, magnetic pickup

Motherboard model: 149369-01 (current), 125792-01 (old version)

Order example: 3500/25 - 01 - 01 - 00 (2 channels, non-isolated, no certification)