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This I/O processor module manages all input and output operations for INFI 90 systems. It handles the scanning and updating of I/O data independently. The unit mounts in any INFI 90 rack slot as a dedicated I/O scanner.
Technical specifications
| Parameter | Specification |
|---|---|
| Brand | ABB Bailey |
| Model | ABB Bailey IIDOP02A |
| Product Family | INFI 90 |
| Category | I/O Processor Module |
| Processor Type | 32-bit microcontroller |
| Processor Speed | 50 MHz |
| Maximum I/O Points | 256 (configurable) |
| Scan Rate | 5 ms (digital), 20 ms (analog) |
| Data Memory | 256 KB RAM (battery-backed) |
| Program Memory | 512 KB Flash |
| Communication Ports | 1 x RS-232, 2 x RS-485 |
| Bus Protocol | INFI 90 I/O bus |
| Component Count | Approximately 125 components |
| Integrated Circuits | 18 ICs (CPU, memory, bus drivers) |
| Power Supply | 24V DC external |
| Current Consumption | 280 mA typical |
| Status Indicators | 5 x LEDs (PWR, RUN, COM, TX, RX) |
| 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 I/O processor module scans field I/O independently from the main controller. It offloads this task to improve overall system performance. The unit handles up to 256 configurable I/O points across multiple racks. It scans digital inputs in 5 milliseconds and analog in 20 milliseconds.
Now let us examine its processing capabilities. The ABB Bailey IIDOP02A uses a 32-bit processor running at 50 MHz. It stores its firmware in 512 KB of flash memory. The module uses 256 KB of battery-backed RAM for I/O data tables. It communicates with I/O modules via the high-speed INFI 90 bus.
This I/O processor draws 280 milliamps from a 24V DC external supply. Five LEDs show power, run, communication, transmit, and receive status. Six gold-plated test points allow bus signal verification. 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 the I/O bus cables to the RS-485 communication ports. The module automatically discovers connected I/O modules upon startup.
Configure the I/O mapping through the INFI 90 engineering software. Set scan rates and I/O addresses for your specific application. The module stores all configuration in non-volatile flash memory. Replace the lithium battery every three years to prevent data loss.
Practical Applications
Engineers use this I/O processor for INFI 90 system optimization and expansion. It improves scan performance in large I/O configurations. This component also works in legacy DCS retrofit projects. Its dedicated I/O scanning offloads work from the main logic processor.
Summary of Features
To conclude, this I/O processor handles 256 I/O points with 5ms digital scanning. It weighs 0.5 kilograms and draws 280 milliamps at 24V. Choose ABB Bailey IIDOP02A for reliable I/O management in INFI 90 systems.