EUCHNER – More than safety.
EUCHNER – More than safety.

CTA-L2-BR-U-HA-APD-SA-166660 (Rend. sz. 166660)

Transponder-coded safety switch CTA-BR, M12

  • Safety switch with guard locking and integrated evaluation electronics
  • Series connection possible
  • Control of guard locking via IO-Link communication
  • Guard locking suitable for process protection only
  • Communication functions in combination with an IO-Link Gateway GWY-CB or ESM-CB
  • Short circuit monitoring
  • 2 safety outputs (semiconductor outputs)
  • Open-circuit current principle
  • Up to category 4 / PL e according to EN ISO 13849-1
  • With plug connector M12
  • Unicode
  • Door monitoring output
  • Approach directions A, B and C (delivery state)
CTA-L2-BR-U-HA-APD-SA-166660 (Rend. sz. 166660)


Approach direction


Can be adjusted in 90° steps

Unicode evaluation

Each actuator is highly coded (unicode). The switch detects only taught-in actuators. Additional actuators can be taught-in. Only the last actuator taught-in is detected.

Control of guard locking via IO-Link communication

Activating guard locking:

Guard locking powered by the device’s operating voltage and controlled by bit CL (bit CL = 1).

Releasing guard locking:

Guard locking released by spring force and deactivated by bit CL (bit CL = 0).

Connector assignment

Plug connector (view of connection side)PinDesignationFunctionConnecting cable conductor coloring

1FI1BEnable input, channel BWH
2UBElectronics and solenoid operating voltage, 24 V DCBN
3FO1ASafety output, channel AGN
4FO1BSafety output, channel BYE
5OD/CDoor position monitoring output/communicationGY
6FI1AEnable input, channel APK
70 VElectronics and solenoid operating voltage, 0 V DCBU
8UA*Solenoid auxiliary voltage, 24 V DC,* connected internally to UBRD
Dimension drawing
Dimension drawing
Connection examples
Connection examples

Dimension drawings

Dimension drawings
1Auxiliary release
2Locking screw
4Plug connector aligned

Connection examples

Connection examples

Műszaki adatok



Work area

Repeat accuracy R
according to EN 60947-5-2 10 %

Electrical connection ratings

Power consumption 6 W
Current consumption
IIMP 400 mA
IUB 40 mA
external (solenoid operating voltage IMP) 0.5 ... 8 A
external (operating voltage UB) 0.25 ... 8 A
Rated insulation voltage Ui 50 V
Rated impulse withstand voltage Uimp 0.5 kV
Operating voltage DC
UUB 24 V DC -15% ... +15% reverse polarity protected, regulated, residual ripple < 5%, PELV
EMC protection requirements according to EN IEC 60947-5-3
Utilization category
DC-13 24V 150mA (Caution: Outputs must be protected with a free-wheeling diode in case of inductive loads)
Solenoid operating voltage DC
UIMP 24 V DC -15% ... +10% reverse polarity protected, regulated, residual ripple < 5%, PELV
Solenoid duty cycle 100 %
Risk time according to EN 60947-5-3
Single device max. 270 ms
Risk time according to EN 60947-5-3, extension for each additional device max. 5 ms
Switching load
according to UL 24V DC, Class 2
Safety class
EN IEC 61140
Test pulses max. 0.3 ms
Test pulse interval min. ca 100 ms
Degree of contamination (external, according to EN 60947-1) 3
Monitoring output OD/C
Output type p-switching, short circuit-proof
Output voltage 0.8xUB ... UB V DC
Switching current 1 ... 50 mA
Safety outputs FO1A / FO1B
Output type 2 semiconductor outputs, p-switching, short circuit-proof
Discrepancy time
both safety outputs max. 10 ms according to EN IEC 60947-5-3
Output voltage
LOW U(FO1A) / U(FO1B) 0 ... 1 V DC
HIGH U(FO1A) / U(FO1B) UB-1.5 ... UB V DC
Turn-on time max. 150 ms
Switching current
per safety output FO1A / FO1B 1 ... 150 mA
Off-state current Ir max. 0.25 mA

Mechanical values and environment

Approach speed max. 20 m/min
Connection 1 plug connectors M12, 8-pin
Degree of protection IP65/IP67/IP69/IP69K (screwed tight plug connector/mating component)
Extraction force 20 N
Ready delay 5 s
Safety switch housing Die-cast zinc
Switch head cover Die-cast zinc
Actuating force 10 N
Mechanical life 1 x 10⁶
Switching frequency max. 0.5 Hz
Overtravel 5 mm
Retention force 20 N
Shock and vibration resistance according to EN IEC 60947-5-3
Ambient temperature
at UB = 24V DC -20 ... +55 °C
Locking force Fmax 8000 N
Locking force FZh 4000 N

Reliability values acc. to EN ISO 13849-1

Mission time 20 y
Category 4
PFHD 5.38 x 10 -9


Additional feature
Retrofit for escape release possible
with blind flange
The following applies to the approval according to UL Operation only with UL Class 2 power supply or equivalent measures; see operating instructions



Complete package

Download all important documents with a single click.


  • The operating instructions and any additions to the operating instructions or brief instructions
  • Any data sheets to supplement the operating instructions
  • The declaration of conformity
Download complete package (ZIP, 17,3 MB)

Single Documents

Other Documents

Ordering data

Rend. sz. 166660
Articlename CTA-L2-BR-U-HA-APD-SA-166660
Weight 1,1kg
Customsclass 85365019

Műszaki támogatás

Műszaki támogatás
Do you have technical questions about our products, their possible use or applications? Our experts will be happy to help.

EUCHNER Magyarország Kft.
+36 1919 0855