Product Detail

Digital Cylinder

Tech Specs

  • No wiring required
  • No electric contact in the cylinder
  • According to DIN 18252 and DIN EN 1303, as far as applicable to electronic systems
  • Certified as per DIN EN 15684
  • Suitable for integration into profile cylinder locks
  • Suitable for installation in fire and smoke resistant doors
  • 2 batteries CR2 Lithium 3V for the knob module
  • 2,4 GHz Bluetooth® Low Energy
  • Supports MIFARE Classic®, MIFARE® DESFire
  • Up to 100,000 actuations during one battery life cycle
  • External power supply possible, if batteries are empty
  • Suitable for indoor and outdoor use.

Temperature range:
+5° C to +55° C (Indoor version) (IP65)
-25° C to +65° C (Outdoor version) (IP66)


  • 2122: Length of the Knob: 42,7 mm*
  • 2122: Diameter of the Knob: 40,0 mm*
  • 2122: Dimensions of the Mechanical Knob: Version A: Length = 20,0 mm, Ø = 29.0 mm / Version B: Length = 20,0 mm, Ø = 34,0 mm
  • 2122: Possible lengths of cylinders from 26/26 mm and/or 30/30 mm, 40/30 mm to 200/200 mm in 5 mm steps
  • 2124: Length of the Knob: 42,7 mm*
  • 2124: Diameter of the Knob: 40,0 mm*
  • 2124: Profile cylinder lengths from 35/35 mm to 200/200 mm in 5 mm steps
  • 2126: Length of the Knob: 42,7 mm*
  • 2126: Diameter of the Knob: 40,0 mm*
  • 2126: Possible lengths of cylinders from 26/10 mm and/or 30/10 mm to 200/10 mm in 5 mm steps

*Dimensions do not apply to version for exterior doors

Installation Tips

General assembly instructions

  • Before assembling the CX212x knob cylinder in a fire/smoke-resistant door, please recheck the fire certification to ensure conformity.
  • Ensure that the sealing affixed on the door does not hamper proper operation of the CX212x.
  • Ensure that the knob cylinder projections do not obstruct the free swing of the door.
  • As electronic knob cylinders are supplied in a completely assembled state as standard, it may be necessary to perform the steps for disassembly, asdescribed in chapter 4.3, before mounting.
  • To activate the knob module, insert the batteries or remove the battery tag, if present, and close the casing (see chapter 7.2.1 Changing batteries).
  • Before mounting the knob module, always check that all components move freely.
  • Carry out the assembly with the door open.
  • Only for cylinders supplied as single components: During initial installation, put in 1 to 2 drops (max. 0.1 ml) of a non-resinous oil in the cylinder body.It should not be sprayed directly into the cylinder body with a spray can.