**Details** These relays have the contact capacity rated at 16A/48V (resistive load). To activate a relay, set the corresponding control line LOW. When left unconnected, control lines default to HIGH (and, hence, relays are off). Combine this Tibbit with Tibbit #20 (nine terminal blocks). **LEDs** There are two red LEDs which are connected to two relay control lines. LEDs light up for the LOW state of control lines (i.e. when relays are activated).