ABB CMA135 (3DDE300415) – Diesel Engine Start/Stop Automatic Control Module | UNITROL Series
Engineering Background
The ABB CMA135, part number 3DDE300415, is a dedicated automatic control module engineered for diesel engine start/stop sequencing within ABB’s UNITROL excitation and generator control platform. Designed to meet the rigorous demands of power generation, marine propulsion, and industrial standby systems, this module provides deterministic control logic for engine cranking, run confirmation, and safe shutdown sequences — eliminating manual intervention and reducing operator error in critical power infrastructure.
Product Positioning
The CMA135 3DDE300415 is the OEM-specified solution for integrating diesel prime movers into ABB UNITROL-based automatic voltage regulator (AVR) and generator management systems. It is the preferred choice for procurement engineers specifying replacement or expansion modules in existing ABB installations, where form-fit-function compatibility is non-negotiable.
Complete Technical Specifications
| Manufacturer | ABB (ASEA Brown Boveri) |
| Part Number / SKU | CMA135 / 3DDE300415 |
| Module Type | Diesel Start/Stop Automatic Control Module |
| Platform / Series | UNITROL Excitation & Generator Control System |
| Function | Automatic engine start/stop sequencing, crank control, run confirmation, shutdown logic |
| Form Factor | Plug-in PCB module (DIN rail / rack mount compatible) |
| Operating Voltage | 24 VDC (nominal, system bus powered) |
| Operating Temperature | -10°C to +55°C |
| Storage Temperature | -25°C to +70°C |
| Weight | 1,260 g (approx.) |
| Country of Origin | Sweden |
| Compliance | CE, IEC 60068, IEC 61131 |
| Warranty | 12 months (Konmask verified) |
Proven Application Environments
- Power Generation: Diesel genset automatic start/stop in standby and peak-shaving applications
- Marine & Offshore: Engine management integration in vessel power management systems (PMS)
- Oil & Gas: Emergency diesel generator (EDG) control in upstream and downstream facilities
- Data Centers & Critical Infrastructure: UPS bypass and generator auto-transfer sequencing
- Industrial Plants: Compressor and pump drive diesel engine automation
- Utilities & Substations: Backup power system integration with SCADA/DCS
Engineering Advantages
- OEM Form-Fit-Function: Direct plug-in replacement for existing ABB UNITROL installations — no rewiring or reconfiguration required
- Deterministic Sequencing Logic: Hardened start/stop timing eliminates race conditions and false starts in multi-engine configurations
- Fail-Safe Architecture: Integrated watchdog and self-diagnostic routines ensure safe shutdown on fault detection
- Low Integration Risk: Factory-calibrated and tested; compatible with ABB UNITROL 1000, 5000, and 6000 series AVR platforms
- Long Service Life: Industrial-grade components rated for continuous duty in harsh electrical environments
System Architecture & Signal Flow
The CMA135 module interfaces directly with the UNITROL system backplane, receiving start/stop commands from the AVR supervisory controller. Upon a valid start command, the module executes a configurable pre-lube delay, initiates the crank output, monitors the engine speed feedback signal for run confirmation, and releases the crank circuit upon successful start. On shutdown, the module manages cooldown timers and actuates the fuel solenoid stop output in the correct sequence. All I/O signals are optically isolated to protect the control system from diesel engine electrical noise.
Sourcing & Quality Verification
- All CMA135 3DDE300415 units sourced by Konmask.com are genuine ABB OEM parts — no third-party rebrands or refurbished units without disclosure
- Each unit undergoes incoming inspection: visual check, label verification (ABB part number, date code, country of origin), and functional power-on test
- Units are stored in ESD-safe, climate-controlled warehousing to preserve PCB integrity
- Full traceability documentation available upon request (batch records, test reports)
Procurement Process
- Confirm compatibility: Verify your UNITROL system model and existing CMA135 installation slot
- Request a quote: Contact [email protected] for volume pricing, lead time, and export documentation
- Place order: Purchase directly via Konmask.com or via PO for B2B accounts
- Shipping: DHL / FedEx express worldwide; EXW Xiamen available for freight consolidation
- After-sales: 12-month warranty, technical support, and return authorization (RMA) process
Technical FAQ
Q: Is the CMA135 3DDE300415 compatible with UNITROL 1000 and UNITROL 5000?
A: Yes. The CMA135 is designed for the UNITROL platform family. Confirm your backplane slot designation with your ABB system documentation before installation.
Q: Can this module be used with non-ABB AVR systems?
A: The CMA135 is optimized for ABB UNITROL backplane integration. Use with third-party AVR systems requires custom interface engineering and is not recommended without ABB engineering review.
Q: What is the lead time for in-stock units?
A: In-stock units ship within 1–3 business days. Contact us to confirm current stock status before placing your order.
Q: Do you provide a certificate of conformance (CoC)?
A: Yes. CoC, packing list, and commercial invoice are provided with every shipment. Additional documentation (MSDS, test reports) available on request.
Q: What is the return policy?
A: 30-day return window for unused, uninstalled units in original packaging. DOA units covered under 12-month warranty with RMA process.
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