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

CEM-I2-AY-U-C40-LZ-SA-157549 (Order no. 157549)

Transponder-coded safety switch CEM-AY-C40, n-switching

  • Safety switches with guard locking for process protection and integrated evaluation electronics
  • Solenoid with locking force 600 N
  • Adhesive-force adjustment in 3 levels
  • Short circuit monitoring
  • 2 safety outputs (semiconductor outputs)
  • Up to category 4 / PL e according to EN ISO 13849-1 for door position monitoring
  • With plug connector M12
  • Unicode
  • Door monitoring output
  • n-switching
CEM-I2-AY-U-C40-LZ-SA-157549 (Order no. 157549)


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


Guard locking actuated by energy ON and released by energy OFF.

Connector assignment

Plug connector (view of connection side)PinDesignationFunctionPotential

1IMPControl voltage of guard locking solenoid, 24 V DC+ 24 V DC
2UBOperating voltage 24 V DC+ 24 V DC
3FO1ASafety output, channel 1PNP
4FO1BSafety output, channel 2PNP
5RSTReset input+ 24 V DC
6OTDoor monitoring outputNPN
7OLGuard lock monitoring outputNPN
80 V UBOperating voltage 0 V0 V DC
Dimension drawing
Dimension drawing
Wiring drawing
Wiring drawing
Transponder-coded safety Switch CEM-C40

Dimension drawings

Dimension drawings
1Active solenoid face
2Active read head face

Connection examples

Connection examples

Technical data


EAC_RU C-DE.MO05.B.00971/20

Work area

Assured release distance sar 18 mm
Center offset
Solenoid -5 ... +5 mm (in all directions)

Electrical connection ratings

Current consumption
I UB, guard locking active 350 mA (Monitoring outputs not loaded)
I UB, guard locking inactive 80 mA (Monitoring outputs not loaded)
external (operating voltage UB) 1 A
rated conditional short-circuit current 100 A
Rated insulation voltage Ui 30 V
Rated impulse withstand voltage Uimp 0.5 kV
Operating voltage
DC 24 V -15% ... +15% (PELV)
Discrepancy time max. 10 ms
Turn-on time 700 ... 2500 ms (Guard locking active)
EMC protection requirements according to EN 60947-5-3
Risk time according to EN 60947-5-3 max. 260 ms
Safety class III
Test pulses max. 0.8 ms
Degree of contamination (external, according to EN 60947-1) 3
Output type Semiconductor output, n-switching, short circuit-proof
Output voltage
switched on max. 0.7 V DC (at current of 20 mA)
switched off max. UB V DC
Switching current
per monitoring output max. 20 mA
Output type Semiconductor outputs, p-switching, short circuit-proof
Output voltage
HIGH U(FO1A) / U(FO1B) UB - 1.5 ... UB V DC
LOW U(FO1A) / U(FO1B) 0 ... 1 V DC
Switching frequency, electrical 0.5 Hz
Switching current
per output 1 ... 150 mA
Utilization category
DC-13 DC-13 24 V 150mA (Caution: outputs must be protected with a free-wheeling diode in case of inductive loads)
Off-state current Ir max. 0.25 mA

Mechanical values and environment

Connection Plug connector M12, 8-pin
Degree of protection IP65/IP67 (screwed tight with the corresponding mating connector)
Ready delay 12 s
Solenoid Steel, nickel plated
Read head Plastic (PBT)
Housing Aluminum
Mechanical life
in case of use as door stop, and 1 Joule impact energy 1 x 10⁶
Installation orientation any
Tightening torque
Fixing screws 4 Nm
Adhesive force
adjustable 0. ca. 30. ca. 50 N
Shock and vibration resistance according to EN IEC 60947-5-3
Ambient temperature -20 ... +55 °C
Locking force Fmax
in axial direction 600 N (The device signals if the locking force drops below 400 N.)

Reliability values acc. to EN ISO 13849-1

Mission time 20 y
Monitoring of the guard position
Category 4
Performance Level PL e
PFHD 4.5 x 10-9



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, 5,1 MB)

Single Documents

Other Documents

Ordering data

Ordernumber 157549
Item designation CEM-I2-AY-U-C40-LZ-SA-157549
Gross weight 0,757kg
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.

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