TK-4 – circular plastic iButton reader module

TK-4 (2) Circular iButton reader module for internal mounting.


The reader has two parts made of plastic:

  • a base, which is mounted on the wall, and into which the cable enters and
  • a twist on, circular, top part, with a T-1 reader cup and two high-brightness LEDs (yellow, to indicate a good read and red, to indicate an active relay output – access granted)

The reader comes in two versions, which differ in the pictogram: IN or OUT.

Maximum cable length to a controller is 20m (UTP, STP).


TK-4 (2) TK-4 (1)

Connected products


ID media

AUX devices



Technical details

Power supply from controller (SL-50/83/84/88)
Ma. cable length 10m (SL-50), 20m (SL-83, SL-84)
Cable type 4-way phone cable/UTP/STP (recommended)
Power used 0,3W (if both LEDs on) , 30mW (if LEDs turned on only after clocking).
Communication protocol Dallas 1-wire
Ambient Temp -20 0C – 40 0C
Mounting internal
Dimenzije kutije 110mm x 65mm