The ABB SPDSI14 is a high-density digital input module engineered for the Symphony Plus and Harmony series Distributed Control Systems (DCS). This module acts as the primary interface for collecting discrete state information from field equipment, such as limit switches, pushbuttons, and auxiliary relay contacts. By converting field-side binary signals into logic-level data for the system controller, the SPDSI14 ensures real-time monitoring and high-speed signal processing essential for automated industrial sequences.
Industrial Applications
- Utility Power Generation: Monitoring breaker positions, valve limits, and turbine trip signals in steam and gas plants.
- Water & Wastewater: Tracking pump run/stop statuses and high/low level float switch signals.
- Refining and Petrochemicals: Interfacing with safety interlocks and emergency shutdown (ESD) system triggers.
- Metals and Mining: Managing conveyor belt alignment sensors and motorized gate positions.
Technical Specifications
| Attribute | Specification |
| Manufacturer | ABB |
| Product Family | Symphony Plus / Bailey |
| Model Number | SPDSI14 |
| Module Type | Digital Input Module |
| Signal Channels | 16 Discrete Channels |
| Nominal Field Voltage | 48 VDC (Configurable variants available) |
| Unit Weight | 0.20 kg |
| Dimensions | 3.5cm x 31.4cm x 17.6cm |
| Housing Material | High-durability Dielectric PBT |
| System Architecture | DCS / Harmony Rack |
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