ABB Bailey NIAI02 | Terminal Module

This terminal module provides field wiring termination for INFI 90 analog input signals. It connects field sensors to the analog input module 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 NIAI02
Product Family	INFI 90
Category	Terminal Module
Number of Channels	16 (sixteen) termination points
Terminal Type	Screw clamp (fixed)
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. 0.35 kg
Energy Storage	None (no battery or capacitor)
Operating Temperature	-20°C to 70°C
Mounting	DIN rail (EN 50022)
Compatible I/O Modules	IASI, IMASI, IACI series

Detailed Technical Analysis

This terminal module provides sixteen screw terminal pairs for field signal wiring. A ribbon cable connects the terminal module to the analog input module. The passive design contains no active electronic components or status indicators. Each terminal accepts wire sizes from 24 to 14 AWG.

Now let us examine its construction features. The module uses fixed screw terminal blocks for reliable field connections. Two 20-pin ribbon cable headers link to the I/O module above. The board contains only passive traces and connector components. This terminal module requires no external power supply for operation.

This termination unit weighs 0.35 kilograms for stable DIN rail mounting. Its wide temperature range from -20°C to 70°C suits harsh environments. The ABB Bailey NIAI02 serves purely as a mechanical and electrical connection point. The passive design ensures long-term reliability with no maintenance needs.

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 troubleshooting. Keep field wiring separate from high-voltage AC cables to reduce noise. The passive design requires no configuration or addressing at startup. Always power down the I/O module before connecting or disconnecting the ribbon cable.

Practical Applications

Engineers use this terminal module for INFI 90 system expansion and repair. It organizes field wiring for analog input signals from transmitters. 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 terminal module provides 16 screw terminal channels for analog inputs. It weighs 0.35 kilograms and requires no external power. Choose ABB Bailey NIAI02 for reliable field signal termination in INFI 90 systems.