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

CET4-AS-CRA-CB-50X-1-116515 (Rend. sz. 116515)

Safety switch CET-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 6,500 N
  • Category 4 / PL e according to EN ISO 13849-1
  • Multicode
  • Approach direction A (delivery state)
CET4-AS-CRA-CB-50X-1-116515 (Rend. sz. 116515)


Approach direction


Can be adjusted in 90° steps

Guard locking type


Open-circuit current principle, guard locking by control of AS-i output 0. Release by spring force.

Control of the guard locking solenoid

The guard locking solenoid is controlled by the control system via AS-Interface bus bit D0.

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 operating voltage on the bus.
  • The State LED indicates if a fault has been detected on the AS-Interface bus.
  • The green and the red LEDs can be controlled as required by the control system via the bus using bits D1 and D2.

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 (with sealing lacquer, for example).

Dimension drawing
Dimension drawing
Connector assignment
Connector assignment
Block diagram
Block diagram
CET: Transponder-coded safety switch with guard locking

Dimension drawings

Dimension drawings

Connection examples

Connection examples
View of plug side

Connection examples

Connection examples

Műszaki adatok


EAC_RU C-DE.MO05.B.00971/20c_UL_us_E155795_3/4DGUV_ET 20018_ET 20019

Electrical connection ratings

ASI data in
according to AS-i Safety at Work D0 (Door position)
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 D2 (Guard locking)
ASI data out
LED green D2 (1 = LED on)
Guard locking solenoid D0 (1 = Solenoid energized)
LED red D1 (1 = LED on)
LED red Fault (Offline phase or address 0)
LED green Power (ASI voltage present)
ASI slave type
according to ASI specification 2.1 ID code: B
according to ASI specification 2.1 EA code: 7
ASI address 0
ASI operating current 50 mA
ASI auxiliary voltage
IEC 60742, PELV 24 V -15% ... +10%
ASI auxiliary current 480 mA
ASI voltage 22.5 ... 30 ... 31.6 V
Safety class
EN IEC 61140 III
Degree of contamination (external, according to EN 60947-1) 3

Mechanical values and environment

Approach speed max. 20 m/min
1 x Plug connector M12 (4-pin)
Degree of protection IP67 (screwed tight plug connector/mating component)
Ramp stainless steel
Safety switch housing Die-cast aluminum
Mechanical life 2 x 10⁶
Installation orientation any (preferably head downward)
Switching frequency max. 0.5 Hz
Degree of freedom X ±5 mm
Degree of freedom Y ±5 mm
Degree of freedom Z ±4 mm
Shock and vibration resistance according to EN IEC 60947-5-3
Ambient temperature
at UB = 24V DC -20 ... +55 °C
Locking force Fmax 6500 N
Locking force FZh 5000 N (FZH = FMAX/1.3)
Guard locking principle Open-circuit current principle

Reliability values acc. to EN ISO 13849-1

Mission time 20 y
Control of guard locking
Any installation orientation B
Performance Level PL b
Any installation orientation 4.23 x 10-6
Monitoring of guard locking and the guard position
Any installation orientation 4
Performance Level PL e
Any installation orientation 3.1 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, 2,8 MB)

Single Documents

Other Documents

Ordering data

Rend. sz. 116515
Articlename CET4-AS-CRA-CB-50X-1-116515
Weight 1,247kg
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