PeopleKey V30 Plus, Техническое руководство по установке

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2. In some cases when using AC supplied inductive loads it may also be necessary to implement an R-C (resistor-
capacitor) snubber network to limit the rate of rise of back EMF. Design of snubber protection networks in
general is beyond the scope of this document however the following simple circuit may solve difficult AC load
back EMF problems.

Select a 100nF 240VAC rated capacitor and 10R carbon composition resistor and configure in series.

Place the series connected R-C snubber network directly across the load terminals in parallel with the
protection device or back-to-back zeners.
Important Notice
In any application it must be stressed that using a relay operated load brings load voltage and currents through
the v30 main PCB. Failure to implement suitable protection measures externally may permanently damage the
v30 even though the external load is within rated voltage and current.