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

CTM-LBI-BR-M-AZ-SA-165517 (Order no. 165517)

Transponder-coded safety switch CTM-LBI-BR, M12

  • Safety switch with guard locking and integrated evaluation electronics
  • Series connection possible
  • Communication functions in combination with an IO-Link Gateway GWY-CB or ESM-CB
  • Short circuit monitoring
  • 2 safety outputs (semiconductor outputs)
  • Bistable guard locking
  • Category 4 / PL e according to EN ISO 13849-1
  • Actuating force 26 N
  • Extraction force 18 N
  • Plug connector M12, 8-pin
  • Auxiliary release
  • Multicode
CTM-LBI-BR-M-AZ-SA-165517 (Order no. 165517)


Multicode evaluation

Every suitable actuator is detected by the switch.

Guard locking type


Guard locking operated by means of input signal.

This type of guard locking has a function to prevent

  • persons from unintentionally locking themselves inside if the safety door is open in case of a power failure or if the machine is switched off.
  • the deactivation of the activated guard locking in case of a power failure.

Connector assignment

Plug connector (view of connection side)PinDesignationFunctionConductor coloring of connecting cable

1FI1BEnable input, channel 2WH
2UBOperating voltage, 24 V DCBN
3FO1ASafety output, channel 1 GN
4FO1BSafety output, channel 2 YE
5OD/CDoor monitoring output/communicationGY
6FI1AEnable input, channel 1PK
70 VOperating voltage, 0 VBU
8IMPControl input of guard locking solenoidRD
Dimension drawing
Dimension drawing
Wiring drawing
Wiring drawing

Dimension drawings

Dimension drawings
2Auxiliary release

Connection examples

Connection examples

Technical data



Work area

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

Electrical connection ratings

Degree of contamination (external, according to EN 60947-1)
Industry 3
external (operating voltage UB) 0.7 ... 8 A
Power consumption
at max. switching frequency 3 W
Rated impulse withstand voltage Uimp 0.5 kV
Rated insulation voltage Ui 50 V
Safety class
EN IEC 61140 III
Solenoid duty cycle 100 %
Switching load DC 24V, UL Class 2 (alternatively, see operating instructions)
Solenoid IMP
Current consumption
Guard locking not active (open) 20 ... 50 mA
Input voltage
Guard locking active (closed) 0 ... 5 V DC
Guard locking not active (open) 20.4 ... 26.4 V DC
Monitoring output OD/C
Output type p-switching, short circuit-proof
Output voltage 0.8xUB ... UB V DC
Switching current 1 ... 50 mA
Safety input 1
Current consumption max. 7 mA Safety inputs Fl1A/Fl1B
Safety outputs FO1A / FO1B
Discrepancy time
both safety outputs max. 10 ms according to EN 60947-5-3
Extension of risk time according to EN 60947-5-3 max. 10 ms
Off-state current Ir max. 0.25 mA
Output type 2 semiconductor outputs, p-switching, short circuit-proof
Output voltage
LOW U(FO1A) / U(FO1B) 0 ... 1 V DC
HIGH U(FO1A) / U(FO1B) UB-1.5 ... UB V DC
Risk time according to EN 60947-5-3
Single device max. 200 ms
Switching current
per safety output FO1A / FO1B 1 ... 150 mA
Test pulse interval 100 ms
Test pulses max. 0.3 ms (Applies to a load with C <= 30 nF and R <= 20 kohm)
Turn-on time max. 400 ms
Utilization category
DC-13 24V 150mA (Caution: outputs must be protected with a free-wheeling diode in case of inductive loads)
Operating voltage UB
Current consumption
IUB at operating voltage UB = 24 V max. 500 mA
Operating voltage DC
UUB 24 V DC -15% ... +15% reverse polarity protected, regulated, residual ripple 5%, PELV

Mechanical values and environment

Actuating force 26 N
Ambient temperature
at UB = 24V DC -20 ... +60 °C
Approach speed max. 20 m/min
Connection Plug connector M12, 8-pin
Degree of protection IP65/IP67 (screwed tight plug connector/mating component)
Extraction force 18 N
Guard locking principle BiState
Installation orientation any
Locking force Fmax 1300 N
Locking force FZh 1000 N
Seals Fluorinated rubber (FKM)
Safety switch housing reinforced thermoplastic
Mechanical life 1 x 10⁶
Overtravel 2 mm
Ready delay 5.5 s
Shock and vibration resistance according to EN 60947-5-3
Switching frequency max. 0.25 Hz

Reliability values according to EN ISO 13849-1

Mission time 20 y
Control of guard locking
Category 3
Performance Level PL d
PFHd 1.03 x 10 -7
Monitoring of guard locking
Category 4
Performance Level PL e
PFHd 4.52 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



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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