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

CTP-L1-AP-U-HA-AE-SII-129478 (Order no. 129478)

Transponder-coded safety switch CTP-AP, 2 x M12, with escape release

  • Safety switch with guard locking and integrated evaluation electronics
  • Direct connection to decentralized peripheral systems (e.g. ET200pro)
  • Short circuit monitoring
  • 2 safety outputs (semiconductor outputs)
  • Up to category 4/PL e according to EN ISO 13849-1
  • With 2 plug connectors M12
  • Unicode
  • Door monitoring output
  • With escape release
  • Approach directions A, B and C (delivery state)
CTP-L1-AP-U-HA-AE-SII-129478 (Order no. 129478)


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.

Guard locking type

CTP‑L1Guard locking actuated by spring force applied and power-ON released (closed-circuit current principle)

Escape release

This is used for manual release of guard locking from the danger zone without tools.

Connector assignment

Plug connector (view of connection side)




Conductor coloring of connecting cable

X 1.1


Operating voltage of AP electronics, 24 V DC


X 1.2


Safety output, channel 1


X 1.3

0 V UB

Operating voltage of AP electronics, 0 V


X 1.4


Safety output, channel 2


X 1.5


Not used


X 2.1


Not used


X 2.2


Door monitoring output


X 2.3


Control input of guard locking solenoid, 0 V


X 2.4


Control input of guard locking solenoid, 24 V DC


X 2.5


Not used


Dimension drawing
Dimension drawing
Dimension drawing
Dimension drawing
Wiring diagram
Wiring diagram
CTP: Transponder coded safety switch CTP

Dimension drawing

Dimension drawing
1Auxiliary release
2Locking screw

Dimension drawing

Dimension drawing

Wiring diagram

Wiring diagram

Technical data


Zulassung EACZulassung c_UL_us LISTED Class 2 or LV/C

Mechanical values and environment

Shock and vibration resistance In acc. with EN 60947-5-3
Housing material
Switch head cover Die-cast zinc
Safety switch housing Fiber glass reinforced thermoplastic
Net 0,42 kg
Ambient temperature
At UB = 24V DC -20 ... +55 °C
Degree of protection IP67/IP69/IP69K (Screwed tight plug connector/mating component)
Mechanical life 1 x 106
Installation orientation Any
Ready delay max.1 s
Switching frequency max.0,5 Hz
Connection 2 plug connectors M12, 5-pin + pin 5 not used
Approach speed max.20 m/min
Guard locking principle Closed-circuit current principle
Locking force Fmax 3900 N
Locking force FZh 3000 N (Fzh = Fmax/1.3 Depending on the actuator used)
Retention force 20 N
Extraction force 20 N
Actuating force 10 N
Overtravel 5 mm

Electrical connection ratings

Test-pulse interval min.100 ms
Test pulses max.0,3 ms (Applies for a load with C ≤ 30nF and R ≤ 20kOhm)
Operating voltage DC
UUB 24 V DC -15% ... 15% Reverse polarity protected, regulated, residual ripple < 5%, PELV
Current consumption
IIMP 400 mA
IUB 40 mA
Utilization category acc. to EN 60947-5-2
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
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
Connection rating 6 W
EMC protection requirements In acc. with EN IEC 60947-5-3
Solenoid duty cycle 100 %
Degree of contamination (external, according to EN 60947-1) 3
Safety class
EN IEC 61140 III
Switching load
According to UL 24V DC, class 2 (Alternatively see operating instructions)
Safety outputs FO1A / FO1B
Type of output 2 semiconductor outputs, p-switching, short circuit-proof
Switching current
Per safety output FO1A / FO1B 1 ... 150 mA
Output voltage
LOW U(FO1A) / U(FO1B) 0 ... 1 V DC
HIGH U(FO1A) / U(FO1B) UB-1,5 ... UB V DC
Off-state current Ir max.0,25 mA
Turn-on time max.400 ms
Discrepancy time
Both safety outputs max.10 ms In acc. with EN IEC 60947-5-3
Monitoring output OD
Type of output p-switching, short circuit-proof
Switching current 1 ... 50 mA
Output voltage 0,8xUB ... UB V DC

Work area

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


Additional feature Escape release actuated by pushing
For the approval acc. to UL the following applies Operation only with UL class 2 power supply, or equivalent measures see operating instructions

Reliability values according to EN ISO 13849-1

Performance Level PL e
Category 4
PFHD 4.1 x 10 -9
Mission time 20 y



Technical support

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

+1 315 701-0315