User Manual
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Solar protection, anti-glare protection, utilization of daylight
Anti-glare/solar protection actuators
Siemens Switzerland Ltd
Building Technologies Division
2019www.siemens.com/gamma
6
Stock No. Product No. DT
5WG1521-4CB23 JB 521C23 A
JB 521C23Shutter Blind Actuator, 2 x AC 120 V, 6 A
• 2 channels
• Electrically interlocked relays to reverse the direction of rotation
• Integrated electronics for detection of the actuation of an electromechanical limit switch and with
auto-calibration of the travel time from one limit switch to the other
• Bus-powered electronics
• Integrated bus coupling units, bus connection via bus terminal
• Type of protection: IP 20
• For separate control of a sun protection, door or window drive with a motor for AC 120V and electro-
mechanical or electronic limit switches per actuator channel
• Relay contacts rated for AC 120 V, 6 A (resistive load)
• As built-in device with 1/2 inch thread connection for mounting to or in a UL/NEMA Junction Box with
feedthrough of the function wires through the 1/2 inch threaded connector
• Communication objects per actuator channel for moving the sun protection to limit positions or to
stop travel and for step-by-step adjustment of blind slats
• Communication objects for moving the sun protection and adjusting blind slats directly to a new posi-
tion by positioning commands as percentage values
• Automatic opening of blind slats up to a set position after the blinds have been lowered without any
stop from upper to lower limit position
• Integrated 1-bit scene control for programming/recalling of 2 favored positions of blind and slats
• Integrated 8-bit scene control and assignment of up to 8 scenes per channel
• An optional object “Sunshine” for activation/deactivation of sunlight tracking of the slats for shading
with greatest possible daylight component
• Differentiation between automatic and manual mode and with automatic switch-over from automatic
to manual mode of the respective actuator channel on activation of a bus pushbutton for manual
control of the sun blind
• Priority of manual mode over automatic positioning commands
• Optional central command object for switching-over of all actuator channels to automatic mode and
for moving the sun blinds to the upper or lower limit position
• Alarm object wind/rain/frost per channel for moving the sun protection to the congured safety posi-
tion in the event of an alarm and with blocking of travel to another position as long as alarm pending
• Travel blocking object per device or per channel for blocking the sun protection in its current position
(e.g. during cleaning of an outdoor Venetian blind)
• Status objects per actuator channel for query or automatic transmission of sun blind and slat position
as percentage values
• Optional status objects for signalling that the lower or upper limit position has been reached
Dimensions (W x H x D) 70 x 90 x 44,6 mm
7-Anti-glare_solar protection actuators.indd 17 26.07.2018 14:23:26