ABB SPDSI22 Symphony Plus Digital Input Module

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The ABB SPDSI22 Symphony Plus Digital Input Module is a 16‑channel universal digital input card for the Symphony Plus HR I/O (Harmony Rack) family, designed to connect field device s to a Symphony Plus controller. Each of its 16 inputs is optically isolated and can be individually configured to accept 24 VDC, 48 VDC, 125 VDC, or 120 VAC signals, enabling mixed‑voltage deployments without separate I/O modules. The unit draws power from a 5 VDC supply (±5%) at about 95 mA typical, with per‑channel input currents of approximately 4.5 mA at 125 VDC or 6 mA at 120 VAC. Operating temperature range is 0 °C to 70 °C (32 °F to 158 °F), making it suitable for many industrial environments. In a Harmony Rack installation, the SPDSI22 serves as the digital input interface, delivering reliable, isolated signals from sensors, switches, and other discrete devices to the Symphony Plus controller for real‑time monitoring and control. This module provides scalable input capacity for applications such as process monitoring, equipment signaling, and general digital input tasks within the Symphony Plus ecosystem. Show more