Description of functions - Basic Documentation - GMA121.1E - GMA126.1E - GMA131.1E - GMA136.1E - GMA161.1E - GMA161.1E/MO - GMA163.1E - GMA164.1E - GMA166.1E - GMA321.1E - GMA321.1E/SW

The functions are listed in a table and are assigned to the respective control types.

Type	GMA12..1 / GMA32..1	GMA13..1	GMA16..1	GMA161.1E/MO
Control type	Two-position control	Three-position control	Modulating control	Modbus RTU
Positioning signal with adjustable characteristic function	-	-	Y = DC 0...35 V with offset Uo = 0...5 V and span ΔU = 2...30 V	-
Rotary movement, rotary direction	Clockwise or counter-clockwise movement depends on the mounting position of the damper shaft.
Rotary movement, rotary direction	When operating voltage is supplied, the actuator goes from 0° ⇒ 90°.	When operating voltage is supplied and depending on the control, the actuator goes from 0°⇒ 90° (open) from 90°⇒ 0° (close) When control is interrupted, the actuator remains in the respective position.	-	On the setting of the respective parameter
Spring return	On power failure or when the operating voltage is switched off, the spring return moves the actuator to its mechanical zero position.
Position indication: Mechanical	Rotary angle position given by the position indicator.
Position indication: Electronic	-	Connecting the feedback potentiometer to an external voltage source results in voltage supply proportional to the rotary angle.	Position indicator: Output voltage U = DC 0...10 V is generated proportional to the rotary angle.	By Modbus register value
Self-adaptation of rotary angle range	-			When self-adaption is active, the actuator automatically detects mechanical end of the rotary angle range.
Auxiliary switch	The switching points for auxiliary switches A and B can be set independent of each other in increments of 5° within 5° to 90°.			-
Powerpack (two actuators, tandem-mounted)	Mounting two actuators of the same type on the same damper shaft doubles the torque.		Not permissible
Response on damper blocking	The actuator is equipped with an automatic switch-off mechanism.
Manual adjustment	When no voltage is applied, you can turn the actuator to any rotary angle position (using a hex wrench) and lock by using a screwdriver, or the adjustment tool. The actuator returns to the zero position on mechanical unlocking by means of a hex wrench (turn in "90°" – open" direction) or by shortly supplying operating voltage.
Rotary angle limitation	The rotary angle range can be limited mechanically by inserting the shaft adapter in 5° increments.

Description of functions - Basic Documentation - GMA121.1E - GMA126.1E - GMA131.1E - GMA136.1E - GMA161.1E - GMA161.1E/MO - GMA163.1E - GMA164.1E - GMA166.1E - GMA321.1E - GMA321.1E/SW - GMA326.1E

OpenAir™ GMA...1 actuators with spring return