GE Multilin MMII-PD-1-2-120 Mm2 Motor Manager

Basic Information

Product Type: GE Multilin MM2-PD-1-2-120, a panel mount (PD) model of the MM2 series motor protection and management system. It is suitable for protection, control, and monitoring of low-voltage AC motors, and is particularly adapted to Motor Control Centre (MCC) applications.

Core Functions: Integrates protection, control, and monitoring functions, replacing traditional bimetallic overload elements, timers, relays, and other devices to simplify system design.

DATA SHEET

mm2.pdf

MM2 Motor Manage Instruction Manual.pdf

Configuration and Option Packages for MM2-PD-1-2-120

Standard Configuration Basis

Basic protection functions: Motor thermal model, phase unbalance protection, contactor fault detection, overload protection, etc.

Supports Modbus RTU serial communication (RS485, 1200-19200 bps) for remote monitoring .

Offers chassis mount or panel mount options; the PD model is panel-mounted and includes a local operation interface .

Option Package 1 (Enhanced Control and Diagnostics)

Added functions: Process control and process inputs, undervoltage auto-restart, enhanced diagnostics (including alarms, pre-trip data, and motor operation historical statistics) .

Input expansion: 8 programmable switch inputs, 1 analog input (4-20mA) with configurable high and low alarm and trip thresholds .

Option Package 2 (Enhanced Protection and Inputs)

Added protection functions: Ground fault protection, locked/stalled rotor protection, winding overheating (thermistor) protection, undercurrent/underpower protection, overvoltage/undervoltage protection .

Input and output expansion: Second contactor control (including 2 additional control inputs), single-phase voltage transformer (VT) input (for calculating kW and kWh), motor winding thermistor input (supports PTC and NTC sensors) .

Relay configuration: 2 auxiliary programmable relays (AUX 1 and AUX 2) supporting 31 function assignments .

Control Voltage: 120VAC (range 80-135VAC, 50/60Hz) .

Core Protection Functions of MM2-PD-1-2-120

• Overload Protection: Based on 12 types of I²t overload curves (including 8 standard curves and 4 NEMA-compatible curves) with an accuracy of ±200ms (for trip time ≤10 seconds) or ±2% (for trip time ＞10 seconds).
• Abnormal State Protection: Phase unbalance (15% for alarm, 30% for trip), ground fault, locked/stalled rotor, overvoltage/undervoltage, winding overheating (via thermistor), contactor failure, etc.
• Start and Operation Control: Supports various starter types (full-voltage reversible/non-reversible, wye-delta, two-speed, inverter, etc.), with configurable start counts/intervals, acceleration time protection, and undervoltage auto-restart.
• Control Functions
• Switch Inputs: 6 fixed control inputs (Start A/B, Stop, local isolator, etc.) + 10 programmable inputs (33 interlock functions).
• Output Relays: 2 contactors (A/B) + 2 auxiliary relays, with contact capacity supporting resistive/inductive loads (e.g., 10A@250VAC resistive load).

Monitoring and Metering of MM2-PD-1-2-120

• Metering Parameters
• Electrical Parameters: Phase current, ground fault current, voltage, power (kW), energy (kWh), load rate, current unbalance, etc.
• Status Data: Thermal capacity usage, relay input status, trip records and pre-trip values, motor operation statistics (number of starts, running time, etc.).
• Recording and Maintenance
• Trip Records: Automatically records the cause of trips and real-time values.
• Maintenance Reminders: Configurable intervals for regular maintenance (e.g., bearing lubrication, contactor inspection), with alarms triggered when intervals are exceeded.

User Interface and Communication

• Local Interface: 40-character LCD display, operation buttons (Start/Stop, programming keys), 11 status LED indicators (Running, Stopped, Tripped, Alarm, etc.).
• Communication Protocol: Supports Modbus RTU (RS485) for remote parameter reading/modification, status monitoring, and command execution.

• Software Support: Compatible with EnerVista™ Suite (including Launchpad configuration tool and Viewpoint monitoring software), enabling offline configuration, data trend analysis, and system integration.

Environmental and Technical Specifications of MM2-PD-1-2-120

• Operating Environment: Temperature range 0°C to 60°C, relative humidity compliant with IP53 (NEMA Type 12), suitable for harsh industrial environments.
• Certification Standards: Complies with CSA (LR41286), UL (E83849), IEC 947-1, etc.; passes anti-interference tests such as electrostatic discharge and electrical fast transients.
• Physical Parameters: Panel-mount design with display and buttons; maximum weight 1.8kg; dimensions refer to panel-mount specifications (approximately 7.10 inches × 7.36 inches).

Application Scenarios of MM2-PD-1-2-120

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