The Von Duprin EL 9927EO surface mounted vertical rod exit only device with electric latch retraction allows you to begin a new installation or convert an existing exit door (or pair) with surface vertical rods to access control, and remote buzz in. With this electrified panic device, you bypass the need and cost of using maglocks. Most commonly found on exterior exit pairs with no mullion, and exit doors employing the old-style swing push bars, surface vertical rods feature 2-point latching andsecure the door into place by fitting into a strikein the top door jamb, andfloor surface.A handle trim with key entryis typically found on the exterior side of thedoor. Without electric latch retraction, the only way to grant entry is by distributing key copies (not safe), continually running to the door each time someone needs in (not efficient), or by manually dogging (holding back the latch) the panic device (not secure). The electric latch retraction feature of the Von Duprin EL9947EO allows you to transition away from keys by providing you the ability to addkeypad or card access, andremotely lock and unlockthe door from a control room,manager’s office, secretary’s desk, or using a hand-held transmitter. When a PIN code, card, or other authorized credential gets presented to the reader, your access control system will energize the solenoid on the EL 9927EO to retract the latch bolt, enabling pass thru. This same solenoid is also used for the momentary, or extended unlatching via a switch, or door release button. EL 9927EO does not include the current transfer cord from door to frame, nor the power supply or operator switch. We offer these at checkout.