DS-K2704X(P) — 4-door access controller main board (expandable)

• Enterprise-grade Ultra-series 4-door access controller main board with downstream RS‑485 expansion to control up to 128 doors (via DS‑K2M002X modules).
• Supports OSDP over RS‑485 and Wiegand readers, web-based configuration, and advanced access functions such as anti‑passback and multi‑door interlocking.
• Large capacity: up to 100,000 users, 200,000 cards, 10,000 fingerprint templates and 600,000 event records. Ideal for transport hubs, banks and large enterprise sites.
• Robust I/O: 4 lock outputs, 4 exit buttons, 4 door contacts, 8 alarm inputs, 4 alarm outputs plus tamper and fire interfaces. Backup battery charging/discharging supported; status LEDs for diagnostics.

Why choose this board? Suited to professional installations requiring redundancy and scale. Downstream RS‑485 redundancy wiring provides improved communication stability for large distributed systems.

Installation & compliance: Intended for professional installation. Requires 12 V DC supply (12 VDC ±15%); power consumption ≤102 W. Check local regulations and warranty terms; use authorised installers to ensure system integrity and warranty validity.

Safety note: Isolate power before installation, follow manufacturer datasheet and local electrical regulations. For system design and battery choices consult technical documentation or a qualified installer.