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This fieldbus interface module connects INFI 90 controllers to PROFIBUS DP networks. It acts as a master on the bus for distributed I/O communication. The unit mounts in any INFI 90 rack slot as a gateway device.
Technical specifications
| Parameter | Specification |
|---|---|
| Brand | ABB Bailey |
| Model | ABB Bailey IIPRT091 |
| Product Family | INFI 90 |
| Category | Fieldbus Interface Module |
| Network Protocol | PROFIBUS DP (master) |
| Transmission Rate | 9.6 kbit/s to 12 Mbit/s |
| Physical Interface | RS-485 (9-pin D-sub) |
| Maximum Slaves | 31 devices per segment |
| Maximum Cable Length | 100 m at 12 Mbit/s, 1200 m at 93.75 kbit/s |
| Data Exchange | 244 bytes input, 244 bytes output |
| Component Count | Approximately 115 components |
| Integrated Circuits | 15 ICs (processor, transceiver, logic) |
| Power Supply | 24V DC external |
| Current Consumption | 250 mA typical |
| Status Indicators | 4 x LEDs (PWR, RUN, TX, FLT) |
| Test Points | 6 gold-plated test points |
| Energy Storage | None (no battery or capacitor) |
| 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 fieldbus module manages PROFIBUS DP communication independently from the main controller. It supports transmission rates from 9.6 kbit/s up to 12 Mbit/s. The module automatically detects the baud rate during network startup. It handles up to 31 slave devices on a single segment.
Now let us examine its data exchange capacity. This module transfers up to 244 bytes of input and output data. Approximately 115 components populate both sides of the circuit board. Fifteen integrated circuits include the PROFIBUS processor and transceiver. The board contains no batteries or capacitors for energy storage.
This interface module draws 250 milliamps from a 24V DC external supply. Four LEDs show power, run, communication, and fault status. Six gold-plated test points allow network signal verification. The RS-485 interface uses a standard 9-pin D-sub connector for bus wiring.
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 PROFIBUS cable to the 9-pin D-sub connector. Use shielded twisted-pair cable with proper termination at both ends.
Configure the module using the INFI 90 engineering software. Set the baud rate and slave addresses for your network. The module stores its configuration in non-volatile memory. Always power down the rack before inserting or removing this module.
Practical Applications
Engineers use this fieldbus module for INFI 90 system integration and expansion. It connects the DCS to PROFIBUS DP field devices. This component also works in legacy system retrofit projects. Its 12 Mbit/s speed suits high-performance industrial networks.
Summary of Features
To conclude, this fieldbus module supports PROFIBUS DP at up to 12 Mbit/s. It weighs 0.5 kilograms and handles 31 slave devices. Choose ABB Bailey IIPRT091 for reliable fieldbus connectivity in INFI 90 systems.