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- 130 × 50 × 105 mm
- 0.88kg
- 3DDE300401/3DDE 300 401
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Product Technical Profile – ABB CMA121 / CMA 121 (3DDE300401)
1) Brand and Series Overview
Brand: ABB
Series: CMA Series – Control & Measurement Modules
The CMA series is a family of compact industrial modules engineered for signal acquisition, conditioning, control processing, and data interfacing in automation systems. These modules are widely used in PLC cabinets, distributed I/O assemblies, machine automation, and process monitoring setups where precise, dependable signal handling is essential.
The CMA121 is an enhanced measurement and control unit in this series, designed to operate reliably under industrial conditions while providing accurate analog and digital signal processing. It extends the capabilities of the CMA lineup with improved signal flexibility and integration-friendly design.
2) Product Overview
The ABB CMA121 (3DDE300401) is a multifunctional analog/digital measurement and control module used to acquire, condition, and relay process signals to programmable logic controllers (PLCs) or distributed automation systems. It supports mixed signal types, enabling systems to capture real-time information from the production floor, process it, and relay it reliably to higher‑level control devices.
This module is built for rugged performance in industrial environments, featuring noise‑immune circuitry, wide temperature tolerance, and compact mechanical packaging that fits standard DIN rail or panel mount layouts.
3) Technical Parameters
| Parameter | Specification |
|---|---|
| Model | CMA121 / CMA 121 (3DDE300401) |
| Product Type | Hybrid Control & Measurement Module |
| Series | CMA Series |
| Input Signals | Analog (Voltage/Current) and Digital |
| Output Signals | Conditioned Analog and Digital Outputs |
| Power Supply | 24 V DC |
| Power Consumption | ≤ 6 W |
| Communication | PLC Interface / Control Bus Compatible |
| Mounting | DIN Rail (35 mm) or Panel Mount |
| Operating Temperature | −20 °C to +60 °C |
| Storage Temperature | −40 °C to +85 °C |
| Relative Humidity | 5–95 % non‑condensing |
| Protection Rating | IP20 |
| Dimensions (H × W × D) | 130 × 50 × 105 mm |
| Weight (kg) | 0.88 kg |
| Housing Material | Flame‑retardant industrial polymer |
| Terminal Connection | Screw terminals |
4) Product Description
The CMA121 module is designed to handle mixed analog and digital process signals within industrial automation systems. Its primary role is to:
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Acquire Signals: Capture precise analog inputs such as 4–20 mA or 0–10 V from sensors, transmitters, and level detectors, as well as digital inputs from switches and status contacts.
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Condition and Isolate Signals: Provide filtering, scaling, and isolation to ensure high signal integrity in electrically noisy environments typical of industrial plants.
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Output Processed Data: Deliver conditioned signals back to PLCs or distributed I/O systems for real‑time control or monitoring.
The CMA121 supports flexible installation on DIN rails or direct panel mounting and is suitable for both standalone machine control and integration into larger automated systems.
5) Key Advantages
• Mixed Signal Capability – Handles both analog and digital signals in one module.
• Compact Design – Space‑efficient form factor suitable for dense control cabinets.
• Industrial Durability – Designed to perform reliably under varying temperature and humidity.
• Signal Integrity – Provides noise immunity and signal conditioning for reliable measurement.
• Modular Flexibility – Can be integrated with PLCs, SCADA, or distributed control systems.
• Low Power Consumption – Efficient operation with ≤ 6 W.
• Easy Integration – Compatible with standard DIN rail setups and common industrial wiring practices.
• Low Maintenance – Durable components reduce the need for frequent servicing.
6) Typical Applications
• Analog sensor data acquisition (temperature, pressure, level)
• Digital event and status monitoring (limit switches, alarms)
• Mixing analog and digital control in machine automation
• Environmental and energy parameter monitoring
• Integration with PLCs in discrete manufacturing automation
• Distributed I/O systems in process plants
• Data acquisition for SCADA and MES systems
• Hybrid signal control systems in water/wastewater, HVAC, and utilities
7) Five Related Models (CMA Series or Similar)
| Model | Function / Feature | Dimensions (mm) | Weight (kg) |
|---|---|---|---|
| CMA111 | Analog signal acquisition module | 120 × 45 × 95 | 0.70 |
| CMA112 | Mixed analog/digital module | 120 × 45 × 100 | 0.75 |
| CMA113 | Digital I/O module | 120 × 45 × 100 | 0.75 |
| CMA114 | Mixed signal advanced module | 125 × 50 × 105 | 0.80 |
| CMA115 | High‑speed acquisition module | 130 × 50 × 110 | 0.85 |
8) Five Popular ABB Models (Industrial Portfolio)
| Model | Product Type | Primary Feature / Rating | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|
| ACS580‑01‑12A6‑4 | Variable Frequency Drive | 5.5 kW | 358 × 152 × 203 | 6.5 |
| ACS880‑01‑017A‑4 | Drive Inverter | 17 kW | 220 × 120 × 180 | 3.6 |
| Emax 2 E2.2 | Air Circuit Breaker | 1600 A | 371 × 210 × 268 | 8.2 |
| Tmax XT4N | Molded Case Circuit Breaker | 250 A | 140 × 105 × 160 | 2.1 |
| AF16‑30‑10 | Contactor | 16 A | 90 × 55 × 78 | 0.42 |
9) Frequently Asked Questions (FAQ)
Q1: What is the main purpose of the CMA121 module?
A1: It captures, conditions, and transmits both analog and digital signals for processing by PLC or automation systems.
Q2: What input signal types can it handle?
A2: Both analog signals (e.g., 4–20 mA, 0–10 V) and digital ON/OFF signals.
Q3: What supply voltage does CMA121 require?
A3: The module operates on a 24 V DC supply.
Q4: How is the module mounted?
A4: It can be installed on a standard DIN rail or panel mount.
Q5: What are the operating temperature limits?
A5: −20 °C to +60 °C.
Q6: Can the module function in electrically noisy environments?
A6: Yes, it includes filtering and conditioning to maintain signal integrity.
Q7: How compact is this module?
A7: Dimensions are 130 × 50 × 105 mm, with a weight of 0.88 kg.
Q8: Is it compatible with different PLC systems?
A8: Yes, it is designed for broad compatibility with PLC and control systems.
Q9: Does it consume much power?
A9: No, its power consumption is low at ≤ 6 W.
Q10: In what types of automation panels is CMA121 typically used?
A10: It is used in industrial process, machine automation, distributed I/O systems, and SCADA installations.