The modules in the Saia PCD1.E-Line S-Series for HVAC applications have a mix of analogue and digital inputs and outputs. With 6 to 12 data points per module, they can be combined easily and are an economical addition to the L-Series. With their compact design, they can be installed in places where space is extremely limited, including electrical distribution boxes. The manual override operating panel, which can be accessed with buttons on the module or remotely via web panel, makes commissioning and servicing activities easy to perform for every output.