Actuator wiring (Modbus RTU)
The damper actuators are supplied with a prewired connecting and communication
cable. All interconnected devices must be connected to the same G0.
The operating voltage at terminals G and G0 must comply with the requirements under
SELV or PELV.
Safety transformers with twofold insulation as per EN 61558 required; they must be
designed to be on 100 % of the time.
All information necessary for commissioning is contained in the following:
This document ("Technical basics" Z4621en).
Mounting instructions 74 319 0109 0 (M4621).
HVAC plant diagram.
Check to ensure that all permissible values as contained in chapter 8 "Technical data"
Check for proper mounting and to ensure that all mechanical settings correspond
to the plant-specific requirements. Additionally, ensure that the dampers are shut
tight when in the closed position.
Fasten the actuator securely to avoid side load.
Rotary movement check: Manually change the damper setting by pressing the gear
train disengagement button and turn the adapter (only if not voltage is applied).
Check to ensure that the cables are connected in accordance with the plant wiring
The operating voltage AC 24 V (SELV/PELV) or AC 230 V must be within the
Technische Grundlagen: Drehantriebe GEB...1
System potential AC 24 V
System neutral AC 24 V
Reference (Modbus RTU)
Bus + (Modbus RTU)
Bus - (Modbus RTU)