'DELTA I-SYSTEM СУППОРТДЛЯ МОД. JACK БЕЖЕВЫЙ DELTA m-system - design and quality to perfection from Siemens. Our m-system provides different module inserts for signaling and communication purposes. The Siemens m-system offers the following advantages: 1. Due to its modular design, use is possible in the DELTA line, DELTA miro, DELTA profil and DELTA style ranges. 2. A module holder can be fitted with up to two different functions. www.siemens.com/delta. Siemens offers a comprehensive portfolio of protection, switching, measuring and monitoring devices, distribution systems as well as switches and sockets for safe and efficient electrical infrastructure in buildings and industry.