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Technical Specifications and Input Features
The ABB 200-IA8 digital I/O unit (also known as S200-IA8) belongs to the ABB Advant 800xA product family . This module provides eight digital input channels specifically designed for 120V AC signals . The unit features optical isolation through optocouplers, with all eight inputs sharing a common AC voltage connection . Its compact dimensions measure 2.2 cm x 12.4 cm x 12.6 cm, and it weighs a mere 0.1 kg .
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model Number | 200-IA8 |
| Alternative Reference | S200-IA8 |
| Product Family | Advant 800xA |
| Input Channels | 8 (digital) |
| Input Voltage | 120V AC |
| Isolation | Galvanic (optocoupler) |
| Signal Filtering | Low-pass filter |
| Status Indication | Yellow LEDs per channel |
| Connection | Screw terminals (terminal base) |
| Dimensions (H x W x D) | 2.2 x 12.4 x 12.6 cm |
| Weight | 0.1 kg |
| Country of Origin | Switzerland |
| Product Status | Active / Available |
Functional Capabilities
The 200-IA8 module actively processes AC input signals from field devices such as switches and sensors. It samples each input at intervals determined by the software, and only changes the signal status when two consecutive samples match . This debouncing feature effectively eliminates false readings from noise or contact bounce. The integrated low-pass filter further enhances signal quality for reliable operation. Yellow LEDs on the front panel provide clear visual status indication for each channel . Power for the internal logic comes from the I/O system adapter .
Application Scenarios
This digital input unit suits industrial automation applications requiring reliable AC signal acquisition. It integrates seamlessly into ABB Advant 800xA systems for monitoring switch states, limit switches, and proximity sensors. The ABB 200-IA8 also serves in legacy installations where 120V AC inputs remain standard. Its galvanic isolation protects the control system from electrical noise. The compact form factor facilitates installation in space-constrained control cabinets.