This product is part of the Modicon M171/M172 range, an offer I/O modules for HVAC solutions. This additional I/O module offers 4 discrete inputs with sink or source (positive/negative) discrete input logic. It is a module with discrete input voltage of 24V AC/DC and analogue output voltage ranges from 0V to 10V. This module offers SPDT relay output with independent common and 3 SPST relay output with same common discrete output. The main application of this module is HVAC and pumping solution. Modicon M171/M172 benefits maximize profitability and energy efficiency by using scalable automation control with the Modicon M171/M172. Modicon M171/M172 logic controllers and intuitive software EcoStruxure Machine Expert - HVAC are designed for maximizing profitability and energy efficiency. Prop 65: WARNING: This product can expose you to chemicals including: Lead and lead compounds, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov - Compatible Products: TM171ASCTB14 - Cross Sell Products: TM171PBM27R; TM171PDM27R; TM171PDM27S; TM171PFE03; TM172OBM18R; TM172ODM18R; TM172PBG07R; TM172PBG18R; TM172PBG28R; TM172PBG42R; TM172PDG07R; TM172PDG18R; TM172PDG18S; TM172PDG28R; TM172PDG28S; TM172PDG42R; TM172PDG42S