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This enhanced logic master module executes complex control algorithms for INFI 90 systems. It processes ladder logic, sequential functions, and regulatory control loops. The unit mounts in any INFI 90 rack slot as a standalone controller.
Technical specifications
| Parameter | Specification |
|---|---|
| Brand | ABB Bailey |
| Model | ABB Bailey NLMM02 |
| Product Family | INFI 90 |
| Category | Enhanced Logic Master Module |
| Processor Type | 32-bit microcontroller |
| Processor Speed | 50 MHz |
| Program Memory | 1 MB Flash |
| Data Memory | 512 KB RAM (battery-backed) |
| Execution Speed | 0.5 ms per 1K logic |
| Communication Ports | 1 x RS-232, 2 x RS-485 |
| Network Protocol | INFI Net, MODBUS |
| Component Count | Approximately 130 components |
| Integrated Circuits | 18 ICs (CPU, memory, drivers) |
| Power Supply | 24V DC external |
| Current Consumption | 300 mA typical |
| Status Indicators | 5 x LEDs (PWR, RUN, TX, RX, FLT) |
| Test Points | 6 gold-plated test points |
| Energy Storage | 1 x lithium battery (RAM backup) |
| Battery Type | 3.6V lithium |
| Battery Life | Approximately 3 years |
| Dimensions (L x W x H) | Approx. 22 cm x 11 cm x 3.5 cm |
| Weight | Approx. 0.5 kg |
| Operating Temperature | 0°C to 55°C |
| Mounting | INFI 90 rack slot |
Detailed Technical Analysis
This logic master module uses a 32-bit processor running at 50 MHz. It executes 1K of logic instructions in just 0.5 milliseconds. The board stores its control program in 1 MB of flash memory. It uses another 512 KB of battery-backed RAM for dynamic data.
Now let us examine its communication capabilities. This module includes one RS-232 port for local programming. It also provides two RS-485 ports for INFI Net and MODBUS networking. Approximately 130 components populate both sides of the circuit board. Eighteen integrated circuits include the main CPU and memory chips.
This logic module draws 300 milliamps from a 24V DC external supply. Five LEDs show power, run, transmit, receive, and fault status. Six gold-plated test points allow signal monitoring during commissioning. A lithium battery preserves RAM contents for up to three years without power.
Installation and Configuration Guidelines
You insert this module into any available INFI 90 rack slot. Connect the 24V DC power supply to the designated terminals. Attach communication cables to the RS-232 and RS-485 ports as needed. The module automatically boots upon power application.
Configure the control program using ABB Bailey engineering software. Download the configuration through the RS-232 programming port. The module stores all parameters in non-volatile flash memory. Replace the lithium battery every three years to prevent data loss.
Practical Applications
Engineers use this logic module for INFI 90 system upgrades and expansion. It handles complex batch processes and sequential control applications. This component also works in legacy DCS retrofit projects. Its 50 MHz speed suits demanding logic-intensive processes.
Summary of Features
To conclude, this logic master module executes 1K logic in 0.5 milliseconds. It weighs 0.5 kilograms and includes 1 MB of flash memory. Choose ABB Bailey NLMM02 for reliable logic control in INFI 90 systems.