I. Model Positioning and Core Differences

3500/42E (Encore): Enhanced version, 4-channel fully programmable, API 670, full height, Encore hardware platform

3500/42M: Older model with 4 channels, similar functions, lower precision and anti-interference

3500/40M: 2-channel vibration, basic model

Application: Protection and condition monitoring for key rotating machinery such as steam turbines, gas turbines, compressors, fans, pumps, etc.

II. Core Parameters (3500/42E)

1. Channels and Inputs

Channels: 4 independent channels, each channel can be equipped with different sensor types

Sensor Compatibility:

Electro-Eddy Current (Proximitor): 3300XL, 330104/05/08 series

Speed (Velomitor): 190501 series

Acceleration (Accelerometer): General IEPE

Input Impedance: 10kΩ (Electro-Eddy Current)

Frequency Range: 0.5Hz～30kHz (Programmable)

Measurement Range: Vibration 0～10mm (Peak-to-peak); Displacement ±5mm; Speed 0～200mm/s; Acceleration 0～10g

2. Measurement Accuracy

Vibration / Displacement: ±1% Full Scale

Resolution: 0.1μm (Displacement), 0.01mm/s (Speed)

Update Rate: 100ms/Channel

Same-Channel Synchronization: Supports backplane Keyphasor (3500/50E) for phase measurement synchronization

3. Monitoring Functions (Software Programmable)

Axis Vibration: Band-pass, 1X/2X, Peak-to-Peak, RMS

Axis Displacement / Difference Expansion: Axial Position, Difference Expansion, Eccentricity

Machine Shell Vibration: Speed / Acceleration, Intensity

Alarm Logic: Independent alarm per channel / Hazardous, supports triple-out-two interlock

Trend and Diagnosis: Built-in peak retention, trend recording, spectrum analysis (basic)

4. Electrical and Mechanical

Power Supply: –24VDC (±10%), typical power consumption 6.8W

Size: Full height (241.3×48.8×241.8mm)

Weight: ≈0.85kg

Hot Swap: Supports online replacement

Operating Temperature: –40℃～+70℃ (Industrial grade)

5. Output and Communication

Analog Output: 4–20mA per channel (optional)

Digital Communication: Backplane and 3500/91 (EGD), 3500/92 (Modbus TCP) interconnection

Diagnostic Interface: Front panel USB, local configuration and data export

III. Key Features (Enhancements of Encore)

Fully Programmable: 4-channel independent configuration of sensor types, ranges, filtering, flexible adaptation for multi-parameter monitoring

Enhanced Anti-Interference: Encore hardware optimized EMI filtering, more stable in strong electromagnetic environments (such as near frequency converters)

High Precision and Wide Temperature Range: ±1% accuracy, –40℃～+70℃, meets harsh working conditions

API 670 Compliance: Complies with petrochemical machinery protection standards, can be used in SIL2 safety circuits

Diagnostic Upgrade: Built-in sensor break, short circuit, signal drift detection, reduces false alarms

IV. Typical Accessories

Probe: 330104 (8mm), 330105 (11mm) Electro-Eddy Current; 190501 Speed

Extension Cable: 330130 (5m/9m)

Companion Modules: 3500/50E (Phase Synchronization), 3500/91 (EGD Communication), 3500/22M (Power / Interface)