What safety precautions should I take when handling the Modbus board?

The Modbus board is an electrostatic sensitive device (ESD), so you must handle it by its edges and avoid touching electronic components directly. Wear grounded wrist or foot straps, ESD shoes, or heel grounders to dissipate static energy, and discharge any static charge before handling. Store and transport components in static-safe packaging to prevent damage. (Page 1 — Option Board Installation)