Software House STAR-ACM8-WA iStar Pro ACM Module Board

The STAR‑ACM8‑WA is an add‑on Access Control Module (ACM II) designed for the iSTAR Pro series by Software House. This compact daughterboard expands the iSTAR Pro's capacity, allowing connection of up to eight additional Wiegand or RM (magnetic stripe) readers. It integrates seamlessly via a cable and relay interface, enabling easy plug‑and‑play installation. Each ACM II module supplies multiple supervised inputs and dry-contact relays to support door locking hardware, alarm integration, and reader LED/beeper indications. The board is fully compatible with the iSTAR Pro’s existing diagnostics, configuration DIP-switches, and peer‑to‑peer networking over TCP/IP or optional dial‑up. Powered at 12 V DC, the ACM II draws minimal current (typically ≤ 0.5 A plus reader loads) and maintains battery‑backed real‑time clock continuity. The STAR‑ACM8‑WA is a discontinued but widely supported expansion module, allowing an iSTAR Pro controller to manage up to two ACMs (16 readers total)—ideal for mid-sized access-control deployments requiring flexible, modular expansion without replacing the main GCM.