... phases,44 channels independent output multi control modes communicate with traffic control center through RS232(optional 1.Power voltage:AC 220V ... flash.4 44 Led indicators show working state of each traffic lights .5 With thunder-protection.6 With EMI, apply to ... plans( 2phases 3, 3 phases 12, 4 phases 15, custom 14, fixed 3(light off, all red and amber flash)).Remark ...