SDC/Security Door Controls 423UL1G Access Controller

SDC/Security Door Controls 423UL1G Access Controller

Overview

The SDC 423UL1G is a networked access control controller engineered for mid to large-scale installations requiring multi-door management and credential flexibility. It delivers centralized control across up to 63 doors with support for 250,000 user records, making it suitable for enterprise facilities, multi-tenant buildings, and integrated security deployments.

Key Specifications

Door Capacity: 63 doors | User Capacity: 250,000 users | Voltage: 24VDC | Credential Support: DESFire, MIFARE, NFC/13.56MHz, 125kHz Proximity | Communication: OSDP and TCP/IP protocols | Function: DPDT relay, 1-60 second adjustable timing (green indicator)

Compatibility

Integrates with OSDP-compliant readers and access control systems supporting TCP/IP network deployment. Compatible with DESFire and MIFARE smart cards, NFC badges, and legacy 125kHz proximity credentials, allowing mixed-credential environments without reader replacement. Designed for installers requiring protocol flexibility and scalable multi-door architectures.