Product: Doorking 1504 Intercom
The DKS 1500 series family of keypads provides access control for virtually any application where digital code entry is desired and they are available for stand-alone applications or for connection to an access controller. These vandal resistant keypads (except 1509) use stainless steel face plates, galvanized steel sub-plates and are housed in a rugged steel cabinet. The 1503 and 1506 series keypads are available in surface or flush mount styles. The 1509 is designed for indoor applications and mounts in a single-gang electrical box.
Stores two 4-digit entry codes, two 5-digit entry codes and two 4-digit hold codes
Single Form C dry contact relay
Operates on 12 to 24 volt AC or DC power
Combines the 1503 keypad into a common housing with an intercom sub-station
This sub-station may not be compatible with all intercom systems

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