Access can control the number of damper actuators inside and outside of the AHU. Some of the dampers can only have two positions (Open / Closed) while others can be modulated (0..100%). It is important to chose the control signal matching the actuator for hardwired installations (actuators connected directly to the IOs of the controller).

Modbus connected damper actuators are capable to handle both - the damper related function determines whether it is open/closed or modulating.

Access supports the following damper functions: