Symbol 5842 from IEC 60417 - Title/Meaning: Multi-pulse Function/description: To indicate a reference to a sequence of pulses, for example to identify the control for the release of multiple pulses.
Additional information: 
See also symbols 5130 and 5131
Published in: 3C/794/FDIS
Own work using: iso.org/obp/graphics/grs/29ba8ad1-9795-45c8-b0a1-6baff52121aa 200.png
Vectorization:  Mrmw