• DK-2821


  • Single Output Digital Keypad for Door Lock and Equipment Control
  • 12VDC Operation, Compatible with Fail-safe or Fail-secure Electric Door Lock
  • 3A / 16VDC Maximum Power Rating Solid State Door Lock Driver for Long Service Life
  • Built-in Real-Time-Clock Controls The Start and Stop Times in Daily Operation
  • Stand-alone, Split-decoded and Multi-station Tri-Tech Operations
  • Compatible with The Auxiliary Reader, Auxiliary Keypad and Split-decoder for System Expansion Simply with Single Wire Connection of  Their Common Data I/O Bus
  • User Code, EM Card and EM card + User Code Concurrent Operations
  • Compatible with 125 Khz Manchester 64-bit EM4100 & EM4200 EM Cards and Keyfobs
  • Maximum 1,000 Users for Door Lock Control (Output 1)
  • Multi-task Super User Code for Inhibiting (Refuse Access), Overriding Door Lock (Keep Door Open); and Operating The Output 1 at Any Time And under Any Condition for Safety
  • 50 Visitor Codes for Temporary Workers and Visitors, Which Expire after Use or The Programmable Time of 1-99 Hours
  • Two Programming Options for System Safety Lock-up after Successive False Code Entry
  • Outputs Are Configurable with 1-99999 Seconds Auto Reset Mode or Start / Stop Mode.
  • Auto or Manual User Code Entry Mode for User Convenience And Security Enhancement
  • Pacifier Tone And Door Open Announcer Can Be OFF for Silent Environment
  • Standby Flashing LED Indicator Can Be OFF for People Do Not Like Flashing LED at Night
  • Four Egress Delay and Warning Options for User Convenience and Security Enhancement
  • Built-in Tamper Switch with N.C. Dry Contact
  • Indoor Use Only. Surface Mount on The Supplied Plastic Box or Flush Mount Directly on U.S. Electric Gang Box

DK-2821 MK-II is a self-contained digital access control keypad that combines proximity EM card reader in one unit. It can be flush mount on a single gang box or surface mount on its plastic mounting box.

The keypad output is a solid state relay selectable to drive Fail-safe or Fail-secure electric lock. Solid state relay gives longer service life and prevents sabotage of energizing the output relay to open the door with a strong magnet.

The keypad is employing the Tri-Tech design approach capable of system expansion. It works perfectly in stand alone operation, split-decoded operation for security enhancement with the optional decoder, and multi-station operation for user convenience with the auxiliary keypad-readers.

The keypad is ideal for access control and alarm system arm-disarm control. It is also a programmable industrial timer (from 1 second to over 24 hours) for automatic operator system.

Operating Voltage
12V DC Nominal; 11-15V DC
Operating Current
60mA (quiescent) to 95mA
Operation Temperature
-20 C to +70 C
Environmental Humidity
5-95% relative humidity non-condensing
Working Environment
Indoor use only
Number of Users
Output 1 – 1,000 (PINs and/or Cards)
Proximity Card
Standard EM Card or Keyfob, 125Khz
Number of Visitor Codes
50, programmable for one time or with the time limit
Timings for Code Entry and Card Reading
10 seconds waiting for next digit entry
30 seconds waiting for code entry after card reading
The Timer
1-99,999 Seconds (Over 24 Hours possible) Programmable Timers for O/P 1
Egress Button
Programmable for Instant, Delay with Warning
Momentary or Holding Contact for the Exit Delay
Output Contact Ratings
Output Relay 1 – Solid State Relay, Fail-safe or Fail-secure selectable, 3A/16 VDC Max.
Tamper Switch – N.C. dry contact, 50mA/24VDC Max.
117(H) X 74(W) X 48(D)mm
200 g net
ABS Plastic box

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  • Brand: APO/AEI
  • Product Code: DK-2821
  • Availability: In Stock
  • $260.00