Hekatron Electromagnetic Door Retainers are used to keep self-closing doorways such as fire doors, smoke doors and other doors or gates open. They must be linked to a Smoke Detection System, which, if a fire occurs, breaks the circuit to deenergize the electromagnet and allow the door to close, thus stopping the fire and smoke from spreading.
Features
For wall mounting
No remanence
Integral spark-suppression diode
Polarity reversal protection.