Siemens OpenAir 121.1E Technical Basics

Siemens OpenAir 121.1E Technical Basics

Actuators with spring return

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OpenAir
GMA..1 actuators with spring return
Technical basics
Edition 2.3
Building Technologies
CM2Z4614en
2018-01-11

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Table of Contents
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Summarization of Contents

Introduction to OpenAir Actuators
About this Document
Provides basic knowledge and general technical fundamentals on the GMA..1 actuator series.
Document Contents Overview
Lists the technical fundamentals covered for GMA..1 actuators, including control types and topics.
Actuator Types and Functions
Application and Type Summary
Describes the usage of spring-return actuators and summarizes available actuator types.
Description of Functions
Details functions for two-position, three-position, and modulating control types.
Controllers for Actuators
Lists compatible controllers for connecting to GMA..1 actuators.
Actuator Design, Elements, and Settings
Structure and Design Details
Details on housing, gear train, manual adjustment, and mounting components.
Type-Specific Elements
Describes auxiliary switches, potentiometers, and HMI for specific actuator types.
Setting and Operator Elements
Details the rotary angle scale, potentiometers, and adjustment tools for actuators.
Technical Design Principles
Drive Motor and Spring Return
Explains the brushless DC motor and the spring return mechanism for actuator operation.
Rotary Range and Mechanical Limitation
Illustrates the relationship between gear train, adapter settings, and rotary angle limitations.
Auxiliary Switches and Positioning Signals
Shows the relationship between rotary angle, auxiliary switch points, and positioning signals.
Adjustable Characteristic Function
Details setting offset and span for modulating signals DC 0..35 V.
Neutral Zone Definition
Defines the neutral zone and hysteresis for modulating control characteristics.
Engineering and Safety Guidelines
Safety Notes and General Regulations
Covers safety warnings, general regulations, and specific safety requirements.
Device-Specific Regulations
Outlines regulations for device safety, voltage supply, and actuator connections.
EMC Optimization Notes
Provides guidance on cable management to minimize electromagnetic interference.
Determining the Actuator Torque
Explains how to calculate required torque and select the correct actuator based on damper size.
Installation and Wiring
Mounting Instructions
Steps and information for proper preparation and mounting of the actuator.
Wiring Notes
Information on wiring, permissible voltage drop, and line sizing for actuators.
Actuator Wiring Examples
Illustrates wiring for two-position, three-position, and modulating actuator types.
Commissioning and Modbus Communication
Commissioning Notes Overview
Guides on general checks, environmental conditions, and electrical function tests for commissioning.
Modbus Communication Interface
Details HMI operation, push button addressing, and LED indicators for Modbus.
Modbus Registers and Parameters
Lists Modbus registers for process values, parameters, and device information.
Parameter and Function Descriptions
Explains the function and parameters of override control, adaptive positioning, and backup modes.
Technical Data and Specifications
Electrical and Power Specifications
Details operating voltage, frequency, power consumption, and fuse requirements.
Input and Signal Specifications
Covers positioning signals, input voltage, current, resistance, and protection.
Communication Specifications
Modbus RTU specifications including nodes, address range, transmission formats, and baud rates.
Mechanical and Environmental Data
Provides dimensions, weight, protection class, and environmental operating conditions.
Diagrams and Connections
Internal Diagrams and Cable Labeling
Illustrates internal actuator wiring schematics and wire color codes.
Connection Diagrams
Shows wiring diagrams for two-position and three-position actuator connections.
Modulating Control Wiring
Illustrates special switchings for modulating control based on switch contacts.
Environmental and Disposal Information
Environmental Compatibility Notes
Information on materials, recyclability, and compliance with environmental standards.
Disposal Guidelines
Procedures and regulations for the proper disposal of the actuator.
Safety Warning: Tensioned Return Spring
Critical warning regarding the tensioned return spring and potential injury risk during handling.
Appendix and References
Actuator Dimensions
Provides detailed mechanical dimensions for actuators and mounting brackets.
Referenced Documents
Lists related technical documentation, data sheets, and installation instructions.

Table of Contents