Pins 1 and 2 are connected to the tape protection diodes for relays and drivers must be connected to a common voltage < +12 V>;, Power relays.
Pini 1 na 2 ni kushikamana na mkanda diodes ulinzi kwa ajili ya RELAYS na madereva lazima kushikamana na voltage ya kawaida <; 12 V>;;, Nguvu RELAYS .