Model 2611 Alternating Controllers are microprocessor-based designs for use where two loads are required to alternate for equal run time. 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.. Specifications: Certifications: UL (C and US); Contacts: SPST; Mount: 8-Pin; Voltage Range: 24VAC/VDC