EPRO MMS6220 Vibration Monitor Module

The EPRO MMS6220 provides two independent eddy-current measurement channels, and I use this module when machinery requires precise shaft vibration and position monitoring. It supports wide input ranges, strong electrical isolation, and flexible alarm control, which makes it ideal for turbine, compressor, and rotating-equipment protection systems.

High-Precision Vibration and Position Monitoring

The MMS6220 handles differential sensor inputs with galvanic isolation and supports freely adjustable signal ranges. It also enhances diagnostic accuracy through independent sensor supplies and selectable operating logic for warnings, trips, and machine-state transitions.

Key Features

Supports two fully independent eddy-current measuring chains
Offers galvanic isolation for inputs and sensor power
Accepts flexible voltage and frequency ranges for rotating machinery
Provides 24 V logic inputs for mode selection and alarm settings
Includes a key pulse input for speed-related system control
Ensures stable system integration through open/short-circuit-proof sensor outputs

Technical Specifications

Sensor Inputs

Parameter	Specification
Channels	2 independent eddy current inputs
Input Type	Differential, galvanically isolated
Input Impedance	>100 kΩ
Voltage Range	–1 to –23 VDC
Frequency Range	0.017–70 Hz (1.02–4200 rpm)
Signal Voltage (Min–Max)	0–400 mVpeak (min), up to 8000 mVpeak (max)

Sensor Supply

Parameter	Specification
Supply Voltage	–26.7 VDC nominal
Typical Current	20 mA
Maximum Current	35 mA
Isolation	Fully isolated output buffers
Protections	Short-circuit and open-circuit proof