Description

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GE MM2-PD-1-2-120 (GE Multilin MMII Intelligent Motor Management Controller)
The MM2-PD-1-2-120 (standard model MMII-PD-1-2-120) is an intelligent low-voltage motor control center (MCC) controller of the GE Multilin (now part of GE Automation) Motor Manager II (MM2) series. It integrates protection, control, monitoring and communication functions and is suitable for the comprehensive management of low-voltage motors.

Core parameters
Model: MMII-PD-1-2-120 (MM2-PD-1-2-120)
Brand: GE Multilin (General Electric)
Power supply voltage: 120 VAC, 50/60 Hz
Operating temperature: 0°C ~ 60°C
Analog input: 4–20 mA, accuracy ±2%
Communication interface: RS485 Modbus Plus, baud rate 1200–19200 bps
I/O configuration: 6 fixed inputs + 10 programmable inputs; 2 contactor outputs + 2 programmable outputs
Size (height × width × depth): 19.1 cm × 11.4 cm × 12.7 cm
Weight: Approximately 1.4 kg
Installation method: Panel mounting (with LCD display and buttons)

Key functions
Comprehensive motor protection: Overload, phase loss / phase imbalance, grounding fault, stator lockup / rotor lockup, undervoltage / overvoltage, winding overheating (with thermal resistance input).
Real-time monitoring and diagnosis: Monitoring phase current, grounding current, heat capacity, power, analog input; Recording tripping events and pre-tripping parameters, supporting predictive maintenance.
Integrated control logic: Directly controlling motor contactors, supporting soft start, acceleration and deceleration control, automatic restart in case of undervoltage, simplifying the design of MCC cabinets.
Local and remote interaction: Built-in LCD display + buttons, allowing local parameter settings and status viewing; Accessing the upper system through Modbus Plus for remote monitoring and configuration.

Typical applications
Industrial low-voltage motor control center (MCC)
Industrial production lines, pump / fan, compressor motor protection and control
Motor management in process industries such as water treatment, oil and gas, and chemical engineering
Model interpretation (MMII-PD-1-2-120)
MMII: Motor Manager II series
PD: Standard type (Panel Display, with panel display)
1: Basic protection level
2: I/O configuration version
120: 120 VAC power supply