Voltcraft 240340 digital counter modules 6 digit voltcraft dcm340 the voltcraft 340 digital counter module is a 6 digit forwardsbackwards counter with din dimensions for installation in power supplies lab equipment and control panels standard module with din dimensions 48 x 24mm 14mm digit height and backlight this well designed module has a number of key features including a forwardbackward counter with 6 digit display alarm output for an optional buzzer or led when a pre selected v