User Manual
9-23
Modular installation system, Room Control Box
Junction Box (UL/NEMA) devices
Siemens Switzerland Ltd
Building Technologies Division
2019www.siemens.com/gamma
9
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
position 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
23-Junction Box (UL_NEMA) devices.indd 23 26.07.2018 14:31:51