MMS3120/022-000 (EPRO/Emerson Dual-channel Bearing Vibration Transmitter)

MMS3120/022-000 is a dual-channel bearing vibration transmitter of the MMS3000 series from Emerson (formerly German EPRO), designed for absolute vibration monitoring of small rotating machinery (such as small steam turbines, compressors, pumps, fans, etc.). It can be installed locally and integrates signal conditioning, alarm and communication functions. 

Model Disassembly

MMS3120: MMS3000 Series, Dual Channel, Bearing Vibration

022: Hardware Configuration (Dual Input, Dual Current Output, Relay Alarm)

000: Standard Version, No Additional Options

Complete Order Number: 9100-03047-01

Core function

Dual-channel monitoring: Receives signals from 2 seismic sensors (such as PR9268), measuring the absolute vibration (velocity/displacement) of the bearing.

Integrated configuration: Configures measurement range, filtering, and alarm values through MMS3910W software, adhering to API670/VDI2059 standards.

Alarm and output: 5 digital switches (relays/light couplers), 2 4-20mA analog quantities, supports dual-channel "OR/AND" logic alarm.

On-site installation: IP65 protection, suitable for harsh on-site environments, no need for a cabinet. Technical Specifications

2-channel, compatible with PR9268/20/30/60/70 seismic vibration sensors

Measurement range: Displacement 50–500μm, Velocity 0–50mm/s (configuration selectable)

Frequency response: High-pass 5/10/15Hz; Low-pass 50–1500Hz (-3dB)

Analog output: 2 channels 4-20mA (each channel 1 channel, load ≤ 500Ω)

Switching output: 5 channels relays (48V/1A) or optocouplers (48V/100mA)

Communication: Optional RS485 (eproV2.0) or PROFIBUS DP

Power supply: Redundant 24VDC (18–31.2V), power consumption ≤ 6W

Temperature: -20℃ to +65℃; Humidity 5%–95% RH (no condensation)

Size/Weight: 160×160×120mm, approximately 0.8kg

Typical accessories (small unit vibration monitoring)

Sensor: PR9268/30 (seismic, bearing vibration)

Transmitter: MMS3120/022-000 (dual channel, on-site installation)

Supervisory unit: DCS (4-20mA) or MMS6823R (RS485 communication)