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Actuator Wiring (Modbus Rtu); Commissioning Notes; General Checks - Siemens OpenAir GEB 1 Series Technical Basics

Actuators without spring return
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Note
References
Environmental conditions
Mechanical check
Electrical check
Siemens
Building Technologies
6.4

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.
Strand code
Strand color
1
red (RD)
2
black (BK)
6
violet (VT)
8
grey (GY)
9
pink (PK)
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.
7

Commissioning notes

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.
7.1

General checks

Check to ensure that all permissible values as contained in chapter 8 "Technical data"
are observed.
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
diagram.
The operating voltage AC 24 V (SELV/PELV) or AC 230 V must be within the
tolerance values.
Technische Grundlagen: Drehantriebe GEB...1
Terminal code
Description
G
System potential AC 24 V
G0
System neutral AC 24 V
REF
Reference (Modbus RTU)
+
Bus + (Modbus RTU)
-
Bus - (Modbus RTU)
25/44
CM2Z4621en
2017-05-26

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