The LRWA0 cartridge has to be supplied with a controller that contains the electronic board and a connection cable. The valve controllers are adjusted to the corresponding cartridges. A correct function needs a cartridge and a controller with identical serial numbers. In the LRWA2 (cabinet mounting on DIN-rail) and LRWA4 (sub-base mounting, with G1/4 threaded ports) versions, the electronic board is integrated into the valve’s body ready to connect.