Description
The ABB INIIT13 is a high-performance Intelligent Transfer Interface module belonging to the Symphony Plus and Network 90 / Bailey INFI 90 distributed control system (DCS) families. It serves as a specialized communication bridge designed to facilitate high-speed data transfer and interfacing between the INFI-Net communication ring and various process control units or human-machine interfaces (HMI).
The INIIT13 is engineered for mission-critical industrial environments where data integrity and deterministic communication timing are essential. It acts as a sophisticated gateway, managing the complex protocols of the INFI-Net system while offloading communication tasks from the main control processors.

ABB INIIT13
Product Parameters (Datasheet)
The following specifications detail the technical hardware capabilities of the INIIT13 module:
| Parameter | Specification |
| Model Number | INIIT13 |
| Module Type | Intelligent Transfer Interface |
| System Compatibility | Symphony Plus, INFI 90, Network 90 |
| Processor Type | High-speed integrated communication processor |
| Power Requirements | +5 VDC @ 1.5A (Typical) |
| Communication Port | Dual-redundant INFI-Net ports (via backplane) |
| Data Transfer Rate | Up to 10 Mbps (INFI-Net Serial) |
| Address Range | Supports up to 250 nodes per ring |
| Operating Temperature | 0°C to +70°C (32°F to 158°F) |
| Relative Humidity | 5% to 95% (Non-condensing) |
| Mounting | Standard INFI 90 Module Mounting Unit (MMU) |
Technical Description & Features
- Data Integrity: The INIIT13 utilizes advanced error-checking algorithms to ensure that process data transmitted over the INFI-Net ring remains uncorrupted.
- Intelligent Buffering: It features onboard memory to buffer data packets, preventing data loss during periods of high network traffic or during momentary communication bursts.
- Diagnostic Capabilities: The module is equipped with front-panel LED indicators that provide real-time status updates regarding module health, network activity, and error conditions.
- Hot-Swappable: Designed for high-availability systems, the INIIT13 can be inserted or removed from a powered rack without disrupting the operation of other modules in the same mounting unit.

ABB INIIT13
Country of Origin
- Primary Origin: United States (USA)
Installation & Usage Guidelines
- Module Placement: The INIIT13 must be installed in a dedicated slot within an ABB Module Mounting Unit (MMU). Ensure that the pins are aligned correctly before applying pressure to seat the module into the backplane.
- Configuration: The module’s address is typically set via hardware dip switches located on the side of the PCB. These must be configured according to the system’s network map before power-up.
- Redundancy: In high-reliability applications, it is standard practice to utilize two INIIT13 modules in a redundant configuration to ensure network access is maintained if one module fails.
- Grounding: Ensure the MMU is properly grounded to the cabinet earth bar. The INIIT13 relies on the backplane grounding to suppress electromagnetic interference (EMI).
Product Q&A (Common Questions)
- Q: Can the INIIT13 be used with older Network 90 equipment?
- A: Yes, the Symphony Plus and INFI 90 families are designed with backward compatibility in mind. The INIIT13 can interface with legacy Network 90 modules provided the system firmware supports the specific communication block types.
- Q: What does a red “FAIL” LED on the front panel indicate?
- A: A solid red LED indicates a fatal hardware error or a failure during the module’s power-up self-test. A flashing red LED usually signifies a configuration mismatch or a communication timeout.
- Q: Does the INIIT13 require external software for basic operation?
- A: While the module operates autonomously once configured, it requires the Composer or Symphony Plus Engineering tools for initial database mapping and network addressing.
- Q: Is the INIIT13 compatible with fiber optic networks?
- A: The INIIT13 communicates via the electronic backplane. To interface with fiber optics, it must be paired with an INFI-Net to Fiber optic converter module (such as the INNIS series).
Recommended Related ABB Models
If you are maintaining or expanding a Symphony Plus/INFI 90 system, the following modules are frequently used alongside the INIIT13:
- INNIS21: INFI-Net Communication Slave module (often paired with the INIIT13 for ring connectivity).
- IMMPC12: Multi-Function Processor module (The main control CPU that utilizes the INIIT13 for data exchange).
- IMDSI14: Digital Input Slave module for field signal acquisition.
- IMDSO14: Digital Output Slave module for control execution.
- INICT03 / INICT12: Infi-Net to Computer Transfer modules for PC-based HMI interfacing.
- NKTU02 / NKAS01: Termination Units and Cables required for module-to-field wiring.

