s OpenAir™ Air Damper Actuators Modbus RTU GMA.., GCA.. Spring return types Air Damper actuators 7 Nm / 18 Nm (spring return) with Modbus communication ● ● ● ● ● ● A6V101037201_en--_b 2021-09-07 GMA.. 7 Nm nominal torque GCA..
Functions Function Description Communication Modbus RTU (RS-485), not galvanically separated Functions - Setpoint and actual position 0..100% - Override control Open / Close / Min / Max / Stop - Setpoint monitoring and backup mode Supported baudrates 9.6, 19.2, 38.4, 57.6, 78.4, 115.2 kbaud Supported transmission formats 1-8-E-1, 1-8-N-1-, 1-8-O-1, 1-8-N-2 Termination 120 Ω electronically switchable Type summary Product no. Stock no. Operating voltage Positioning signal GMA161.
Product documentation Title Topic Document ID Rotary damper actuators spring return GMA.. Detailed information about rotary actuators with spring return (7 Nm) Z4614 Rotary damper actuators spring return GCA..
Commissioning Workflow 1 The devices are especially designed for using the Climatix push-button configuration as described in document A3975 1). The bus configuration can alternatively be parameterized by the local HMI, cf. page 5. During commissioning check/set the following: • Bus configuration (address, baudrate, transmission mode, and optionally termination). The default address 255 allows to mount and power multiple actuators at the same time without interfering with each other.
Disposal WARNING Tensioned return spring Opening the actuator housing can release the tensioned return spring resulting in flying parts that may cause injury. ● Do not open the actuator body. The device is considered electrical and electronic equipment for disposal in terms of the applicable European Directive and may not be disposed of as domestic garbage. • Dispose of the device through channels provided for this purpose. • Comply with all local and currently applicable laws and regulations.
HMI (Human-Machine Interface) Push-button operation Activity Push-button operation Display current address Press button < 1s (starting with lowest address digit) Confirmation 1-digits: red 10-digits: green 100-digits: orange If termination is switched on, LED flashes 1x blue after address display Example: 124 = 4x red, 2x green, 1x orange Turn bus termination on / off turn on 1. press 3x 2. press 1x shortly LED flashes 1x blue 3. press button until LED shines red LED shines red (confirmation) 4.
LED colors and patterns Color Pattern Green Orange / green Orange Red Blue Description 1s on / 5s off Normal operation (“life pulse”) without bus traffic flashing Normal operation (“life pulse”) with bus traffic 1s orange / 1s green Device is in override control 1s on / 1s off Bus parameters not yet configured 1s on / 5s off Backup mode entered Steady Mechanical fault, device jammed or manual override 1s on / 5s off Internal error 0.1s on / 1s off Invalid configuration, e.g.
Examples Set address “124”: 1. Enter addressing mode 2. Set 1-digits: Press button 4-times LED flashes red per button press 3. Store 1-digits: press button until LED shines green – release button 4. Set 10-digits: Press button 2-times LED flashes green per button press 5. Store 10-digits: press button until LED shines orange – release button 6. Set 100-digits: Press button 1-times LED flashes orange per button press 7.
Modbus registers Reg. Name R/W Unit Scaling Range / enumeration Process Values 1 Setpoint RW % 0.01 0..100 2 Override control RW -- -- 0 = Off / 1 = Open / 2 = Close 3 = Stop / 4 = GoToMin / 5 = GoToMax 3 Actual position R % 0.01 0..
Supported function codes Function codes 03 (0x03) Read Holding Registers 04 (0x04) Read Input Registers 06 (0x06) Write Single Register 16 (0x10) Write Multiple registers (Limitation: Max. 120 registers within one message) Technical data Power supply Operating voltage G..A161.1E/MO Frequency Power consumption Actuator holds Actuator rotates AC 24 V ± 20 % (SELV) DC 24 V ± 20 % (SELV) or AC 24 V class 2 (US) 50/60 Hz at 50 Hz GMA161.1E/MO GCA161.1E/MO AC / DC: 2.5W GMA161.1E/MO GCA161.
Degree of protection Degree of protection Degree of protection acc. to EN 60529 (see also chapter ‘Mounting’ above) IP54 Safety class Safety class acc. to EN 60730 III Environmental conditions Applicable standard Operation Transport Storage IEC 60721-3-x Climatic conditions Class 3K5 Mounting location Indoors Temperature general -32…55 °C Humidity (non condensing) < 95 % r. h. Climatic conditions Class 2K3 Temperature -32…70 °C Humidity < 95 % r. h.
Diagrams Internal diagrams The damper actuators are supplied with a prewired connecting and communication cable. All interconnected devices must be connected to the same G0. Core desig.
Dimensions GMA.. 141 10.6 42 20 113 Dia.5 168 180 12 Dia. 6.4...20.5 Square 6.4...13 Dia.10.5 31.5 81 60 GMA...1 19 60 192 2 Taptite M6 x 16 4614M01en 3 15 30 30 Mounting bracket GCA.. 300 73 197 67.5 2 4x8,5 27,6 24,8 100 4626M03 4x ø5 ø13 71 230 3 min. 200 35,4 35,4 16 min. 7 min. 60 150 min. 100 Taptite M6 x 16 6x ø4,4 Ø 8... 25,6 mm 6... 18 mm 900 210 S1...S6 max.17,5 ma x. 95° 85,8 1...9 61,5 P1...
Issued by Siemens Switzerland Ltd Smart Infrastructure Global Headquarters Theilerstrasse 1a CH-6300 Zug Tel. +41 58-724 24 24 www.siemens.com/buildingtechnologies Dokument-ID A6V101037201_en--_b Ausgabe 2021-09-07 © Siemens Switzerland Ltd, 2017 Technical specifications and availability subject to change without notice.
