Sdc CR4 4-station Relay Module 12/24 Vdc

Product Description

The SDC - SECURITY DOOR CONTROLS CR4 is a four-station relay module designed for access control and locking applications operating at 12 or 24 volts DC. It provides independent relay outputs for up to four separate door or access control stations, allowing installers to switch lock power, release signals, or auxiliary devices from a single centralized module. The dual-voltage compatibility at 12/24 VDC makes it adaptable to a wide range of access control panel configurations without requiring additional voltage conversion hardware. Security integrators and access control technicians are the primary trade professionals who specify and install this module.

The CR4 is suited for commercial and light industrial access control installations where multiple door stations must be controlled from a common relay bank. Typical applications include electric strike control, magnetic lock release circuits, and auxiliary output switching in multi-door access panels. Its four-station layout consolidates relay switching in panel enclosures where space and wiring organization are priorities.

Key Features

• Four independent relay stations for multi-door access control switching
• Dual-voltage operation at 12 VDC or 24 VDC without modification
• Centralized relay bank simplifies wiring in multi-door panel installations
• Compatible with electric strikes, magnetic locks, and auxiliary switching loads
• Sold as a single unit (each)

Compatibility

Designed as an OEM-style relay expansion module for use with access control systems and locking hardware panels requiring multi-station relay output switching at 12 or 24 volts DC.

Installation Notes

Installation should be performed by a licensed security or low-voltage electrician familiar with access control panel wiring practices. De-energize all panel power before connecting or disconnecting relay module wiring. Follow applicable local low-voltage and electrical codes, including NEC Article 725, when wiring control circuits to this module. Verify system operating voltage matches the module input before applying power.