What loads are you switching with those relays? Inductive loads are worse for inducing transient power effects than pure resistive loads. Does simply disconnecting the load(s), keeping the relay module connected, also solve the problem ?
What loads are you switching with those relays? Inductive loads are worse for inducing transient power effects than pure resistive loads. Does simply disconnecting the load(s), keeping the relay module connected, also solve the problem ?