The ABB INIIT02, also cataloged as the INIIT02 Infi-NET to Infi-NET Remote Transfer Module, operates as a dedicated communication interface for deterministic frame exchange between distributed Infi-NET segments within ABB Bailey Infi 90 architectures. The module implements dual-channel full duplex serial communication using RS-232-C physical layer signaling.

Hardware Specifications

Infi-NET Serial Transfer and Deterministic Link Behavior

The INIIT02 module executes bidirectional Infi-NET frame forwarding using full duplex RS-232-C channels with selectable baud rates ranging from 75 to 19,200 baud for legacy compatibility and up to 2 Mbaud or 10 Mbaud for high-speed system interconnect.

Within the ABB Bailey Infi 90 communication stack, the module functions as a remote transfer bridge, synchronizing node tables between distributed loops. The internal 128 kbyte RAM buffer is used for frame staging, addressing resolution, and cyclic redundancy handling during inter-loop synchronization.

Network Scaling and Node Management Logic

System capacity is defined by hierarchical loop segmentation, supporting up to 250 nodes per loop and a total system scaling capability of 62,500 nodes. Address mapping is managed through deterministic polling cycles, ensuring that inter-loop traffic does not collide under peak throughput conditions.

The module maintains separation between local loop scheduling and remote loop transfer timing, preventing arbitration conflicts during simultaneous duplex transmission.

Frequently Asked Questions

Q: Does INIIT02 support hot-swapping during active Infi-NET communication?
A: Hot-swapping is not supported. Removal interrupts RS-232-C frame synchronization and may cause node resynchronization delay.

Q: What is the function of the 128 kbyte RAM in the module?
A: It is used for frame buffering, routing table storage, and temporary staging of inter-loop transfer packets.

Q: Can the module operate at mixed baud rates simultaneously?
A: No. The communication rate is selected globally per interface mode and applied uniformly across active channels.

Q: Is optical isolation implemented between Infi-NET links?
A: Isolation is implemented at system interface level; RS-232-C signaling remains electrically referenced within defined interface boundaries.

Field Installation Guidelines

Install the module in a certified ABB Bailey Infi 90 rack slot with verified backplane seating alignment. Ensure RS-232-C cabling is properly shielded and grounded at a single reference point to prevent ground loop formation.

Maintain separation between serial communication lines and high-noise switching conductors. Cable routing should avoid parallel runs with power conductors exceeding typical industrial EMI thresholds.

Connector torque and seating integrity must be verified to prevent intermittent communication framing errors during system startup.

Ordering info

• ABB INIIT02 communication module

• Factory-sealed anti-static packaging

• System compatibility reference documentation for Infi-NET integration

• Standard installation and rack mounting guide (Bailey Infi 90 series)

Delivery Information

Delivery time: 3-5 days when payment finish, shipped via DHL / FEDEX / UPS with reinforced anti-static industrial packaging, vibration-resistant foam enclosure, and moisture barrier sealing for controlled logistics handling.