System expansion interface with modular 4 DIN housing. It enables doubling of the length of the entrance panel - handset line, to create independent audio risers, and to expand the range or functions of the apartment system.

• Maximum of 160 loudspeakers can be installed
• Expansion device
• 4 DIN modules
• 2 Wire system
• Power supply from SCS BUS: 18 – 27 Vdc
• Operating temperature: 5 - 40 °C
• Dissipated power: 2.25W(max)