SDC 423UL1G /Security Door Controls 423UL1G Access Controller - Image 2
SDC 423UL1G /Security Door Controls 423UL1G Access Controller - Image 2
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SDC 423UL1G /Security Door Controls 423UL1G Access Controller - Image 5
SDC 423UL1G - Image 5
SDC 423UL1G Access Controller for security door controls and access management systems
Product images are provided for reference and may not represent the exact model, configuration, or included components.

Overview

SKU: 423UL1G
UPC: 712905133317
Condition: New
Availability: Usually ships in 24 hours
Warranty Limited Lifetime Warranty
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SDC

SDC/Security Door Controls 423UL1G Access Controller

Discontinued — No Longer Available NewThis model has been discontinued by SDC. Shop current SDC products → or see the recommended alternatives be…

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SDC/Security Door Controls 423UL1G Access Controller

$124.99
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Overview

SKU: 423UL1G
UPC: 712905133317
Condition: New
Availability: Usually ships in 24 hours
Warranty Limited Lifetime Warranty

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Questions about this product? Free pre-sales support from a senior specialist — product questions, compatibility checks, BOM quotes, price confirmation — typically answered within one business day. Need camera placement or system design work? Engineering time is $175 per hour (qty 1 = 1 hour). Hardware buyers get up to one hour ($175) credited back on their order.

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Description

Discontinued — No Longer Available New

This model has been discontinued by SDC. Shop current SDC products → or see the recommended alternatives below.

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.

Expert Analysis
Specifications
Product Type: Controller
Communication: OSDP, TCP/IP
Door Capacity: 63 doors
Voltage: 24VDC
Type: Controller
Input Voltage: 24VDC
Doors Supported: 63 doors
Credential Type: DESFire, MIFARE, NFC/13.56MHz, 125kHz Proximity
Max Users: 250,000
Reader Type: Multi-credential reader support
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