Red Lion Controls ST-DI-024-16 Digital Input Module

The Red Lion Sixnet ST-DI-024-16 is a 16‑channel digital input module designed for ST‑Bus based systems, providing isolated DC inputs that feed a central controller or HMI. Each channel accepts nominal 12/24 VDC signals with a maximum input rating of 32 VDC, enabling direct connection to common 12/24 V sensors and switches. The module offers 1,200 V isolation between input channels and the ST‑Bus, helping protect the backplane in harsh industrial environments, while drawing power from the bus with a low, fixed power budget. Input timing is fast, with a maximum ON delay of about 4 ms and a maximum OFF delay of about 50 ms, and typical input current around 3.5 mA at 12 V. Operating conditions span −30 to 70°C and 5–95% non‑condensing humidity, accommodating dusty factory floors and remote installations. This unit is intended to be used with a base module to form a complete ST‑Bus I/O assembly. In typical automation applications, it serves as a compact 16‑input bank for monitoring limit switches, sensor statuses, and other DC signals across manufacturing lines, remote equipment, and process controls where isolated, reliable input data is essential for real‑time decision making.