Alternating Controllers

These TRIPLEX and QUADRAPLEX CONTROLLERS are available witheither Sequence-On-Simultaneous-Off SOSO or First-On-First-OffFOFO output logic. The special function models are differentiatedby a rotary switch that allows any output to be locked as the lead loador any one load to be omitted while sequencing only the remainingloads. In addition to load omission and lead selection, the expandablemodel can be set for 2, 3, or 4 load operation with either SOSO orFOFO logic.All models feature INTRINSICALLY SAFE INPUTS and logic that allowsthe outputs to operate properly even if one of the inputs fails to openor close. For example: if the off switch fails to close, the lead load willnot energize until both the lead and the lag switches close. An inrushdelay on all models reduces line sags by preventing multiple loadsfrom energizing simultaneously.