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SMART.GUARD – smart signal converter with probe guard function

SMART.GUARD is a device, allows protecting your probe or TLS against unexpected triggering. It helps to prevent crash or damage.

SMART.GUARD is able to generate ESTOP signal, when connected probe is triggered in the unexpected moment.

Product video

Main function

  • convert input signal to an output signal (signal converter)
  • detect, if a device is connected to the input. Based on this information can generate ESTOP, when a probe or TLS should be connected.
  • generate ESTOP, when a connected device is triggered in an unexpected time, when crash or destruction occurs. This function is blocked by dedicated input. This input can be activated by output from a motion control, or manually by a button.

Main parameters


Typical wiring when output from a motion control is available (on this picture the output from MC is NPN). Some of motion control software (like MACH3, MACH4 etc.) allow modification of a probing script. Free motion control board output can be connected to SMART.GUARD block input, to activate guard function block by a script command.

If there is no free output on a motion control board or it is not possible to modify the probing script in the motion software, block input can be activated by a button. Button is pressed manually when probing is allowed. It blocks the guard function during probing process.


Download full datasheet:

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Probe & 2xTLS set B

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Product Details

Set of the devices contains:

1x DIG3D.LP.M - 5-24V/NPN/NO

1x DIG3D.Fix - 5-24V/NPN/NO

1x DIG-Z.M - 5-24V/NPN/NO





Power voltage 12-24V

Output from SMART.MER/2 can be wired as PNP/NPN, and configured as NO or NC.

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