Description
General Information
表格
| Item | Specification |
|---|---|
| Part Number | CMA120, 3DDE300400 |
| Manufacturer | ABB |
| Product Family | Synpol‑D Generator Control System |
| Product Type | Basic Controller Panel Unit for genset / marine power plant |
| Installation | Panel‑mount installation for cabinet front‑door operation |
| Power Supply | 24 VDC auxiliary power supply |
| Lifecycle Status | Obsolete / End‑of‑Life. OEM manufacturing discontinued. Only new‑old‑stock, refurbished and field‑pulled used maintenance spare parts available; no brand‑new factory‑built units can be ordered. |
| ESD Handling Requirement | Integrated microprocessor, I/O and display electronics; anti‑static wrist‑strap and anti‑static workstation required for installation and replacement operations. |
Electrical & Interface Specifications
- Front‑panel Interface: LCD display, membrane keypad, LED alarm/status indicators for genset parameters and fault events.
- Field Signal Terminals: Multi‑channel digital inputs, analog measurement inputs for engine and generator sensors, relay output contacts for control and alarm signals.
- Communication Port: RS‑485 serial communication interface for connection to higher‑level monitoring system.
- Signal Types: Engine analog measurements (temperature, pressure), generator voltage/current/frequency, binary status inputs, relay alarm outputs.
- On‑Board Circuitry: CPU control logic, analog signal conditioning, fault‑diagnosis circuit, event logging memory, man‑machine interface driving circuit.
- Power Consumption: Typical 12‑15 W under full‑load operating condition.
- Operation Limitation: Cannot operate standalone. Designed for Synpol‑D genset control system; must connect to engine sensors, generator instrument transformers and external auxiliary circuits.
- Compatibility Matrix
‑ Compatible System: ABB Synpol‑D generator & marine power‑plant control system
‑ Mounting: Front panel cut‑out mounting
‑ Hot‑swap: Not supported; power‑down required for unit replacement.
Environmental Specifications
表格
| Item | Value |
|---|---|
| Operating Temperature | ‑20 °C ~ +60 °C inside control cabinet |
| Storage / Transport Temperature | ‑40 °C ~ +85 °C for long‑term spare‑part preservation |
| Relative Humidity | 5 %‑95 % RH, non‑condensing; condensation shall be avoided to prevent circuit corrosion. |
| Compliance Standard | CE certification for marine & industrial automation environment, meets IEC marine environmental criteria. |
| Protection Class | Front panel IP54; rear side IP20 |
| Dimension | 287 mm × 240 mm × 200 mm (W×H×D) |
| Net Weight | Approx. 5.76 kg |
| Conformal Coating | Conformal‑coated version available for offshore and marine harsh‑environment applications. |
| Vibration Resistance | Complies with IEC 60068‑2‑6 marine‑grade vibration standard. |
Main Functions
- CMA120 (3DDE300400) is the basic controller panel unit for ABB Synpol‑‑D generator control system, widely used for industrial backup gensets and marine power‑plant automation control.
- Collects analog and digital signals from engine and generator: monitors engine oil pressure, cooling‑water temperature, generator voltage, current, frequency and other critical parameters.
- Executes generator start‑stop sequence logic, over‑voltage / under‑voltage, over‑frequency / under‑frequency, over‑current protection interlock, records fault events and alarm history.
- Front‑panel LCD and keypad realize local parameter configuration, real‑time process value display, fault checking and manual operation. LED indicators visualize alarm and running status for on‑site operators.
- RS‑485 serial interface uploads genset operating data and fault information to remote monitoring system. Relay outputs send external alarm signals.
- Typical field failure symptoms
‑ No display after power‑on
‑ Incorrect measured value drift or loss of sensor signal
‑ Failure to execute generator start‑stop logic
‑ Loss of alarm‑event recording
‑ RS‑485 communication failure
Common root causes: power‑supply abnormality, ageing of internal measurement circuit, keypad / LCD damage, terminal‑block poor contact, component ageing under marine high‑humidity environment.
- Pure maintenance‑oriented spare‑part component, only for repair and replacement of existing legacy Synpol‑D genset / marine power‑plant installations; not suitable for new‑project engineering deployment.
Typical Applications
- Spare‑part replacement for CMA120 basic controller panel in ABB Synpol‑D generator control system.
- Troubleshooting scenarios: genset monitoring failure, protection interlock abnormal, panel display and operation fault.
- Preventive‑maintenance spare‑part inventory for marine vessel power station and industrial emergency generator set.
- Hardware refurbishment for decommissioned Synpol‑‑D genset control assemblies.
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