The Time Mark 2611 Alternating Controllers are microprocessor-based designs for use where two loads are required to alternate for equal run time. The Model 2611-120 features a voltage range of 120VAC/VDC and a supply current of 0.01A. The LED indicators show status of the units three contact switch inputs and two load outputs. The controllers lead select switch allows loads to alternate normally in the center position, or disable automatic sequencing and lock in a 1-2 or 2-1 sequence.

When a Stop, Lead, or Lag switch closes – corresponding LED atop the Model 2611 illuminates.

When the Stop switch and Lead switch closes, Load 1 or Load 2 will come on and the corresponding green LED will illuminate. If fluid levels continue to rise and the Lag switch closes, the 2nd load will energize. Loads remain energized until the Stop switch opens or a fault condition is detected.