Operating terminal for use with Modicon M171 PLC controllers. The device enables the visualization and operation of the application and is especially suitable for HVAC solutions. The display and operation is carried out via a 4-digit LED display and 4 integrated buttons. The device is equipped with a real-time clock. An interface for LAN expansion bus is integrated. The housing is gray. The connection is made via the LAN expansion bus (connector with 2m cable included in delivery). Flush mounting or panel mounting. Certified according to CE, cURus (UL recognized), CSA, EAC, RCM, RoHS China.