A connecting device configured to electrically connect a solenoid valve to a manifold base includes a housing and two spaced-apart conductive bodies disposed inside the housing. The housing has a valve-connecting portion configured to be connected to the solenoid valve, and a base-connecting portion configured to be connected to the manifold base. Each conductive body has a first conductive portion configured to electrically connect with the solenoid valve, a second conductive portion configured to electrically connect with the manifold base, and an electrical connecting portion connected between the first and second conductive portions.

A valve manifold block for a fluid valve manifold has a valve manifold block with a printed circuit board received in a passage in the valve manifold block. A set of conductive valve lines on the circuit board extend between and are connected to a respective set of first electrical connectors and a respective set of second mating electrical connectors. The circuit board also having at least one conductive valve line extending to a third connector on the circuit board operably leading to one voltage side of the valve unit. A conductive common line is operably connected to an opposite voltage side of the valve unit. A serial communication line connects to a respective serial communication line in another valve manifold block for communicating information relating to the valve unit.

A method of installing and a valve arrangement having a valve unit, such a valve unit having a valve section and an input section arranged on the valve section. The valve section contains at least one electrically actuable directional valve, which is assigned an input module of the input section, that is equipped with plug-in connectors for the connection of sensor plugs. The input module can be installed in a use position on a connector carrier of the input section, so that the sensor plugs through the connector carrier are connected to an internal communication structure suitable for the transmission of sensor signals.