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

CTM-L2-AS1B-U-AZ-SJ-163977 (Rend. sz. 163977)

Safety switch CTM-AS – with AS-i connection, plug connector M12 (open-circuit current principle)

  • Safety switch with guard locking and integrated evaluation electronics
  • Locking force up to 1000 N
  • Up to category 4/PL e according to EN ISO 13849-1
  • Actuating force 44 N
  • Extraction force 32 N
  • Auxiliary release
  • Unicode
CTM-L2-AS1B-U-AZ-SJ-163977 (Rend. sz. 163977)


Guard locking type


Open-circuit current principle: guard locking by control of AS-i output 0 and release by spring force.

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 red


LED green

LED function display

  • The ASI LED indicates the state of the ASi bus.
  • The LOCK LED indicates the state of guard locking.
  • The STATE/DIA LED indicates the state of the switch and possible errors.

Auxiliary release

This is used for releasing the guard locking with the aid of a tool. The auxiliary release must be sealed to prevent tampering (for example with sealing lacquer).

Dimension drawing
Dimension drawing
Connector assignment
Connector assignment
Wiring drawing
Wiring drawing

Dimension drawings

Dimension drawings
2Auxiliary release

Connection examples

Connection examples
View of plug side

Connection examples

Connection examples

Műszaki adatok


EAC_RU C-DE.MO05.B.00971/20Asi Interface_136101_CTMFCC_2AJ58-07_

Work area

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

Electrical connection ratings

ASI data in
according to AS-i Safety at Work D1 (Door position)
according to AS-i Safety at Work D3 (Guard locking)
according to AS-i Safety at Work D0 (Door position)
according to AS-i Safety at Work D2 (Guard locking)
ASI data out
Guard locking solenoid D0 (1 = Solenoid energized)
ASI slave type
according to ASI specification 3.0 ID code: B
according to ASI specification 3.0 EA code: 7
ASI address 1 - 31
ASI operating current 50 mA
ASI auxiliary voltage
IEC 60742, PELV 24 V 15% ... +10%
ASI auxiliary current 650 mA
ASI voltage 26.5 ... 31.6 V
EMC protection requirements according to EN 60947-5-3
Solenoid duty cycle 100 %
Switching load DC 24V, UL Class 2 (alternatively, see operating instructions)
Safety class
EN IEC 61140 III
Degree of contamination (external, according to EN 60947-1)
Industry 3

Mechanical values and environment

Approach speed max. 20 m/min
Connection Plug connector M12, 4-pin
Degree of protection IP65/IP67 (screwed tight plug connector/mating component)
Extraction force 32 N
Ready delay 3 s
Seals Fluorinated rubber (FKM)
Safety switch housing reinforced thermoplastic
Actuating force 44 N
Mechanical life 1 x 10⁶
Installation orientation any
Switching frequency max. 0.25 Hz
Overtravel 2 mm
Shock and vibration resistance according to EN IEC 60947-5-3
Ambient temperature
at UB = 24V DC -20 ... +60 °C
Locking force Fmax 1300 N
Locking force FZh 1000 N
Guard locking principle Open-circuit current principle

Reliability values acc. to EN ISO 13849-1

Mission time 20 y
Monitoring of guard locking and the guard position
Category 4
Performance Level PL e
PFHD 1.468 x 10 -8


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, 3,6 MB)

Single Documents

Other Documents

Ordering data

Rend. sz. 163977
Articlename CTM-L2-AS1B-U-AZ-SJ-163977
Weight 0,26kg
Customsclass 85365019

Műszaki támogatás

Műszaki támogatás
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EUCHNER Magyarország Kft.
+36 1919 0855