Sdc EH4024120A Floor Mount Electromagnetic Door Holder

Product Description

The SDC Security Door Controls EH4024120A is an electromagnetic floor-mounted door holder and closer designed for use in commercial and institutional access control applications. This unit operates on 24 volts AC or DC and 120 volts AC, giving installers flexibility when integrating it into existing low-voltage access control or fire alarm systems. The EH4024120A holds a door in the open position using electromagnetic force and releases it automatically upon loss of power, allowing the door to close under its own closer mechanism. It is typically installed by licensed security contractors, electricians, or door hardware specialists.

This floor-mounted holder is suited for commercial buildings, schools, hospitals, and other facilities that require compliant hold-open door control tied to a fire alarm or access control system. When the system triggers a release signal or power is interrupted, the door is freed to close and latch. The floor-mount design keeps the unit out of the door frame path and is commonly used where wall or overhead mounting is not practical. The dual-voltage input makes it adaptable to a range of panel and power supply configurations already present on the job.

Key Features

• Electromagnetic hold-open mechanism releases door automatically on power loss or alarm signal
• Dual-voltage operation accepts 24 volts AC or DC and 120 volts AC
• Floor-mounted design suitable for locations where wall or overhead mounting is impractical
• Intended for integration with fire alarm or access control systems
• Sold as an individual unit (quantity per package: 1)

Compatibility

Designed as an OEM-style electromagnetic floor-mounted door holder for commercial door control applications requiring 24V AC/DC or 120V AC input. No specific compatible model numbers or system families were provided in the product data.

Installation Notes

Installation of the EH4024120A should be performed by a licensed electrician or certified door hardware technician familiar with low-voltage access control and life-safety wiring requirements. Disconnect and lock out all power sources before wiring or mounting the unit. Wiring must comply with the National Electrical Code (NEC) and any applicable local codes governing fire alarm and access control circuits. Verify that the door closer mechanism is properly adjusted before commissioning the hold-open function.