RKK2020 Damper control module 4x2-point, open/close, auto control 24VAC/DC, 15mA Control module for controlling four 2-point actuators Manual/priority control level for controlling four 2-point actuators in 19" module technology for overriding digital outputs of a controller or DDC system by manual intervention, consisting of: 4 rotary switches Auto-Closed-Open 8 operating messages LED green 4 coupling relays max. 250VAC 1.25A Switch position feedback Auto for further processing in the DDC system. Bus connection to collective alarm module pluggable. Fault reporting system, lamp test circuit, labeling freely selectable.