EXTENDER – 1870261


Improved Connectivity for Somfy Digital Network Systems

Used to refresh a segment’s capacity or create a new isolated bus segment in the middle of an existing bus segment. Additional isolated bus segments support up to 255 devices, 4000 ft. of bus wiring per segment, and supplies 100 power units.


SDN 2.0 products are backed by a SDN 2.0 Certified Quality Promise which means these products have been designed to meet the highest standards for Somfy Digital Network system components and validated by Somfy engineers. Systems designed using SDN 2.0 certified products are easier to install, more reliable, and improve overall system performance.


Efficient Power and Data Distribution

  • Increase the number of devices or bus segments in a system.
  • Isolated data distribution is built into the products and offered stronger data delivery throughout the system.
  • Most innovative motor options are complimented with smart power and data distribution devices to improve the overall experience of digital Somfy motors.

Improved System Design

  • Add devices or segments to a system by choosing the best product in the design.
  • Expand the size of any system by allowing longer wiring lengths or connecting more devices.
  • Built in end of line notification provides automatic termination in system which ensures signal integrity.

Simplified Installation

  • Protect wired devices in case power, ground or data wires are not connectly properly.
  • Easily connect components together using the factory printed port labels and the common RJ45 connection ports.
  • System status LEDs monitor Bus power, SDN activity, SDN idle and end of line indication.

The Extender is a Somfy Digital Network™ (SDN) bus distribution component that is used to refresh a segment’s capacity or to create a new bus segment in the middle of an existing bus segment. The Extender’s additional isolated bus segment supports 255 devices and 4000 ft. of bus wiring per segment, and supplies 100 power units. Additional isolated bus segments enable bus line extension for hard-to-reach places over an extended distance.


  • Splits SDN bus into multiple bus segments
  • System status LEDs which monitor Bus power, communication and end of line notification
  • Mis-wire protection
  • Automatic segment termination
  • Provides 100 power units to an SDN system
  • Replaces the following products
    •    9014573 – 2 Way Splitter
    •    1810816 – Optical Isolation Repeater
    •    1822440 – Bus Power Supply
  • Nominal Voltage / Frequency : SDN Bus Power
  • Length (L3) : 4 in mm
  • Width : 2.13 in mm
  • Height : 0.9 in mm