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

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)
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CM2Z4621en
2017-05-26