Technical Specifications Overview
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model Number | NAMC-11C |
| Product Type | Factory-Original Control CPU Board |
| Compatible Systems | ABB Procontrol P14, P13, and associated platforms |
| Processor Type | 32-bit RISC microcontroller |
| Clock Frequency | 50 MHz |
| Onboard Memory (RAM) | 2 MB SDRAM |
| Non-Volatile Storage | 4 MB flash memory for firmware and application |
| Execution Cycle Time | 5 ms (typical for 1000 logic blocks) |
| Digital I/O Capacity | Up to 64 channels (via expansion) |
| Analog I/O Capacity | Up to 32 channels (via expansion) |
| Communication Ports | 2 x RS-232, 1 x RS-485 |
| Diagnostic Interface | 1 x service port (front access) |
| Real-Time Clock | Battery-backed with crystal oscillator |
| Watchdog Timer | Integrated, hardware-based |
| Status Indicators | 5 LEDs (Power, Run, Error, COM1, COM2) |
| Front Connectors | 2 x 9-pin D-sub (RS-232), 1 x 5-pin terminal (RS-485) |
| Backplane Connector | 48-pin male header |
| Module Dimensions (W x H x D) | 50 mm x 175 mm x 125 mm (2.0″ x 6.9″ x 4.9″) |
| Unit Weight | Approximately 0.85 kg (1.87 lbs) |
| Power Consumption | 300 mA at 5 VDC |
| Internal Energy Storage | 2200 µF bulk capacitor |
| Battery Type | CR2032 (for RTC backup) |
| Battery Life | 3 years typical |
| Firmware Storage | Factory-programmed flash (field-upgradeable) |
| Standards Compliance | CE, UL, CSA, IEC 61131-2 |
| MTBF | 200,000 hours (calculated) |
Functional Overview and Processing Capabilities
This factory-original CPU board serves as the central processing unit for ABB Procontrol systems. It executes control logic, processes I/O data, and manages communication tasks. The NAMC-11C delivers reliable, deterministic performance for demanding industrial applications. Moreover, the board supports both sequential and continuous control strategies. It handles complex PID loops, batch sequences, and interlock logic simultaneously. The module also includes a hardware watchdog timer for fail-safe operation. Consequently, the system automatically recovers from unexpected software faults.
Memory Architecture and Data Storage
The ABB NAMC-11C incorporates substantial onboard memory for demanding control applications. Its 2 MB SDRAM provides ample workspace for logic execution and data processing. The 4 MB flash memory stores the operating system, user programs, and configuration databases. Additionally, the flash memory retains data through power cycles without battery support. The battery-backed real-time clock ensures accurate time-stamping of events. This clock also supports scheduled maintenance and batch execution features. The module also includes memory protection for critical system areas.
Communication Interfaces and Connectivity
The board features multiple communication ports for versatile system integration. Two RS-232 ports support programming, operator interfaces, and printer connections. One RS-485 port enables multi-drop networking with remote I/O and other controllers. The NAMC-11C also includes a dedicated service port for diagnostic access. This service port allows technicians to monitor system health without disrupting operations. The board supports MODBUS RTU and ABB proprietary protocols. This dual capability simplifies integration with third-party devices.
Physical Architecture and Installation Details
The module measures 50 mm x 175 mm x 125 mm (2.0″ x 6.9″ x 4.9″) and weighs approximately 0.85 kg. Its extended height accommodates the processor and memory components. The front panel provides two 9-pin D-sub connectors for RS-232 ports. A 5-pin terminal block serves the RS-485 interface. The 48-pin backplane connector interfaces with I/O modules and power supplies. The board mounts securely with four screws or a DIN rail adapter. The rear housing incorporates passive cooling fins for heat dissipation.
Power Supply and Energy Storage Features
The module draws 300 mA from the 5 VDC system bus. This moderate consumption balances performance and thermal considerations. The internal 2200 µF bulk capacitor provides significant energy storage. This capacitance maintains processor operation during short supply interruptions. The CR2032 battery provides backup for the real-time clock. The module also includes brownout detection circuitry for orderly shutdown. This protection prevents data corruption during severe power disturbances.
Diagnostic Capabilities and Status Indication
The board provides comprehensive diagnostic features for maintenance and troubleshooting. Five front-panel LEDs indicate power, processor activity, and communication status. The module also logs system events and error conditions in non-volatile memory. The service port enables real-time monitoring of processor performance. Through ABB programming tools, engineers can view diagnostic data and trace execution. The watchdog timer independently monitors processor activity. This hardware safety feature initiates a system reset on timeout.
Environmental Conditions and Certifications
The module operates reliably from 0°C to +60°C. Storage temperatures range from -40°C to +85°C. The unit carries CE, UL, and CSA certifications. Install the board in a clean, dry control cabinet. The module also complies with IEC 61131-2 standards. This compliance ensures compatibility with other industrial control equipment.
Details
| Weight | 0.85 kg |
|---|---|
| Dimensions | 50 × 175 × 125 mm |
