ABB CMA120 3DDE300400 Basic Controller Panel Unit

Technical Specifications

Model: CMA120

Part Number: 3DDE300400

Brand: ABB

Product Type: Panel‑mount integrated basic controller

Power Supply: 24VDC

Digital Input: 8‑channel 24VDC sink‑type digital input

Analog Input: 4‑channel, 4‑20mA / 0‑10V configurable

Relay Output: 2‑channel relay output, 5A 250VAC

Display & Operation: Monochrome LCD display, membrane keypad

Communication Interface: RS‑485, Modbus‑RTU protocol

Processor: 32‑bit processor

Memory: 1MB Flash memory, 256KB RAM

Protection Class: Front IP65, rear IP20

Installation Method: Cabinet door mounting

Operating Temperature: ‑20℃ ~ +60℃, non‑condensing

Weight: 0.35kg

Dimension: 144mm ×82mm ×40mm

Compatible System: Industrial machinery, power auxiliary equipment, on‑site local control cabinet

Core Function: All‑in‑one unit integrates control logic, I/O acquisition and local man‑machine interface. It collects field sensor signals, executes local control logic, completes parameter setting and status monitoring through screen and keypad, and realizes data exchange with upper‑level system via Modbus‑RTU communication.

Product Details

The CMA120 3DDE300400 is ABB compact panel‑mount basic controller panel, integrating CPU, I/O channels and local operation HMI in one unit.

This unit is installed on cabinet door, front‑panel IP65 protection level adapts to dusty workshop environment. It receives digital and analog signals from field sensors, runs local control programs, and drives peripheral actuators through relay output channels.

Built‑in monochrome LCD and membrane keypad allow operators to view process values, modify parameters and check alarm records locally without extra HMI hardware. RS‑485 Modbus‑RTU interface supports connection with PLC and SCADA monitoring system.

On‑board self‑diagnosis function can detect power supply abnormality, channel fault and internal operation error, and display alarm information on local screen for fast troubleshooting.

Compact panel‑mount structure saves cabinet inner space, supports convenient on‑site maintenance and replacement.

Widely used in mechanical equipment retrofit, power plant auxiliary control and process industry local control renovation projects.

It is important spare hardware for local control loop debugging and defective CMA120 controller panel replacement.