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

CTP-L1-AS1B-U-HA-AZ-SJ-124987 (Order no. 124987)

Safety switch CTP-L1-AS – with AS-i connection, plug connector M12 (closed-circuit current principle)

  • Safety switch with guard locking and integrated evaluation electronics
  • Locking force up to 3900 N
  • Category 4 / PL e according to EN ISO 13849-1
  • Unicode
  • Approach directions A, B and C (delivery state)
CTP-L1-AS1B-U-HA-AZ-SJ-124987 (Order no. 124987)


Approach direction


Can be adjusted in 90° steps

Guard locking type


Guard locking actuated by spring force and power-ON released (closed-circuit current principle).

Control of the guard locking solenoid

The guard locking solenoid can be controlled via AS-Interface bus bit D0 or via the auxiliary power.

AS-Interface inputs

D0, D1

Door monitoring

D2, D3

Guard lock monitoring

Evaluation is performed via a safety monitor.

AS-Interface outputs


Guard locking

LED function display

  • The ASI LED indicates the state of the ASi bus.
  • The STATE LED indicates the state of the switch.
  • The LOCK/DIA LED indicates if the door is locked and whether a fault has been detected in the switch.
Dimension drawing
Dimension drawing
Wiring drawing<br>Connector assignment
Wiring drawing
Connector assignment
CTP: Transponder coded safety switch CTP

Dimension drawings

Dimension drawings
1Auxiliary release
2Locking screw
4Plug connector not aligned

Connection examples

Connection examples
View of plug side

Technical data


EAC_RU C-DE.MO05.B.00971/20c_UL_us_E155795_3/11Asi Interface_126001_

Work area

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

Electrical connection ratings

ASI auxiliary current 400 mA
ASI data in
according to AS-i Safety at Work D1 (Door position)
according to AS-i Safety at Work D2 (Guard locking)
according to AS-i Safety at Work D0 (Door position)
according to AS-i Safety at Work D3 (Guard locking)
ASI data out
Guard locking solenoid D0 (1 = Solenoid energized)
ASI slave type
according to ASI specification 3.0 EA code: 7
according to ASI specification 3.0 ID code: B
ASI voltage 26.5 ... 30 ... 31.6 V
ASI operating current 50 mA
ASI auxiliary voltage
IEC 60742, PELV 24 V -15% ... +10%
Safety class
EN IEC 61140 III

Mechanical values and environment

Ambient temperature -20 ... +55 °C
Approach speed max. 20 m/min
Connection 1 plug connector M12, 4-pin
Degree of protection IP67/IP69/IP69K (screwed tight plug connector/mating component)
Extraction force 20 N
Guard locking principle Closed-circuit current principle
Installation orientation any
Locking force Fmax 3900 N
Safety switch housing reinforced thermoplastic
Actuating force 10 N
Mechanical life 1 x 10⁶
Overtravel 5 mm
Ready delay max. 1 s
Retention force 20 N
Switching frequency max. 0.5 Hz
Shock and vibration resistance according to EN 60947-5-3
Locking force FZh 3000 N (Fzh = Fmax/1.3, depending on the actuator used)

Reliability values according to EN ISO 13849-1

Performance Level PL e
Mission time 20 y
Category 4
PFHD 4.3 x 10 -9


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, 3,4 MB)

Single Documents

Other Documents

Ordering data

Ordernumber 124987
Item designation CTP-L1-AS1B-U-HA-AZ-SJ-124987
Gross weight 0,574kg
Customs tariff number 85365019

Technical support

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

+44 114 2560123

+1 315 701-0315