MASSO G3 Replacing Damaged Optocouplers

Identifying Optocouplers

  • Inputs - Opto 1 to 8, 10 to 24: LTV-816 or KB817
  • THC Input - Opto 9: SFH615A-2
  • Spindle Encoder Inputs - Opto 25, 26 & 27: SFH615A-2
  • Estop - Opto 38: LTV-816 or KB817
  • MPG Inputs - Opto 28 to 37: LTV-816 or KB817
  • Spindle CW & CCW Outputs - Opto 39 & 40: LTV-816 or KB817

Sourcing replacement parts

INFORMATION: Damaged Optocouplers can be purchased from one of the following suppliers, please click the link below to directly jump to the part order page:

Digi-Key:  Optocoupler LTV-816

Newark Element 14: Optocoupler KB817

Mouser Electronics: Optocoupler LTV-816

Testing procedure for Inputs 1 - 24

Testing procedure for Spindle Encoder Inputs

Testing procedure for MPG Inputs

Testing procedure for the Estop Input

Testing procedure for CW & CCW outputs

Please see the Spindle troubleshooting guide for test procedures.

Replacement Process

WARNING: Ensure that you turn the power off to MASSO and observe standard Antistatic precautions before changing an optocoupler.

CAUTION: Ensure that you observe the correct orientation of the optocoupler when replacing as they are polarity sensitive.