4 Channel Keychain Block Coded Transmitter

$ 52.82

Item Number: 112021 Category:


Digital Transmitters Operation Instructions:

The 4-Channel Block Coded Key Ring Transmitter is designed for use with Linear’s access control products. This model is a four-channel device supplied with a quick-disconnect key ring. Also included are lithium batteries with a five-year service life. A unique 10-second time-out feature prevents the system from being shut down by a single transmitter transmitting continuously.

The transmitter is MegaCode format, which means each transmitter is factory preprogrammed with one of over 1,000,000 codes, virtually eliminating the possibility of code duplication. Because the receiver “learns” each specific code, no unauthorized person can gain access to the system by reprogramming a transmitter.

Block coded transmitters are factory programmed to a sequential series of transmitter ID codes. When used with a Linear access controller, transmitters can be locally or remotely programmed into memory by entering the first and last codes of the block into the system. Facility codes can be selected to further customize the system.


  • Compatible with all Linear access receivers and controllers
  • Supplied with quick-disconnect key ring
  • Factory programmed MegaCode format supports over 1,000,000 codes
  • Two type 2016 lithium batteries supplied
  • RF frequency: 318 MHz
  • 1.25″ W x 2.25″ H x 0.48″ D

Program Transmitter into Receiver:

Refer to the instructions provided with the receiver to program the transmitter into the receiver’s memory. With the receiver in a programming mode, press the desired transmitter button program the button into the receiver.

Linear’s receivers that accept “Block Coding” can be programmed to accept a user defined block of ID codes. These transmitters are block coded. Each block of transmitters is labeled with starting and ending block code numbers, along with an optional facility code number. Refer to the instructions for details on how to program the block and facility code numbers.

Replacing Battery:

Replacing the Battery

Item Number:

SKU: 112021

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