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This termination module provides a convenient field wiring interface for INFI 90 systems. It connects field devices to the main I/O modules in the rack. The unit mounts on a DIN rail near the field junction boxes.
Technical specifications
| Parameter | Specification |
|---|---|
| Brand | ABB Bailey |
| Model | ABB Bailey NIAC02 |
| Product Family | INFI 90 |
| Category | Termination Module |
| Number of Channels | 16 (sixteen) termination points |
| Terminal Type | Screw clamp (pluggable) |
| Wire Gauge | 24 to 14 AWG |
| Voltage Rating | 250V AC / 30V DC maximum |
| Current Rating | 2A per terminal |
| Connector Type (I/O side) | 2 x 20-pin ribbon cable headers |
| Connector Type (Field side) | 16 x screw terminals (2 per channel) |
| Component Count | 1 PCB, 16 terminal blocks, 2 ribbon connectors |
| Status Indicators | None (passive device) |
| Power Supply | None (passive termination) |
| Dimensions (L x W x H) | Approx. 18 cm x 10 cm x 5 cm |
| Weight | Approx. 0.4 kg |
| Energy Storage | None (no battery or capacitor) |
| Operating Temperature | -20°C to 70°C |
| Mounting | DIN rail (EN 50022) |
| Compatible I/O Modules | NTAI, NTAO, NTDI, NTDO series |
Detailed Technical Analysis
This termination module simplifies field wiring for INFI 90 I/O systems. It provides sixteen individual screw terminal pairs for signal connection. A ribbon cable connects the termination module to the main I/O module. The passive design contains no active electronic components.
Now let us examine its construction features. The module uses pluggable screw terminal blocks for easy field wiring replacement. Each terminal accepts wire sizes from 24 to 14 AWG. Two 20-pin ribbon cable headers connect to the I/O module. The board contains only passive components and no status LEDs.
This termination module requires no external power supply for operation. It serves purely as a mechanical and electrical connection point. The ABB Bailey NIAC02 weighs 0.4 kilograms for stable DIN rail mounting. Its wide temperature range suits harsh industrial environments.
Installation and Wiring Guidelines
You mount this module on a standard DIN rail in your control cabinet. Connect the ribbon cable from the I/O module to the 20-pin header. Wire each field device to its designated screw terminal pair. Use ferrule-terminated wires for reliable screw clamp connections.
Label each channel clearly for easy identification during maintenance. Keep field wiring separate from high-voltage AC cables to reduce noise. The passive design requires no configuration or addressing. Always power down the I/O module before connecting or disconnecting the ribbon cable.
Practical Applications
Engineers use this termination module for INFI 90 system expansion and repair. It organizes field wiring for analog and digital I/O signals. This component also works in legacy DCS retrofit projects. Its 16 channels suit medium-sized I/O termination requirements.
Summary of Features
To conclude, this termination module provides 16 screw terminal channels for field wiring. It weighs 0.4 kilograms and requires no external power. Choose ABB Bailey NIAC02 for reliable field I/O termination in INFI 90 systems.