Bus SCS

– General Features:
– SCS bus based on sheathed twisted pair with flexible conductors
– Braided and unshielded with 300/500V isolation
– Unpolarized bus requiring DC power supply support in both polarity
– Rules adopted by CEI (International Electrotechnical Committee)
– Devices must have double isolation for SELV

– Wiring:
– Two possible wiring types: Free cabling and Star wiring
– Free cabling suitable for old houses with mix of bus and star topology
– Star wiring preferred for new houses where all devices connect to switch rack

– Communication:
– SCS bus transmits signals in frequency modulation
– Signals include electricity supply, data clock at 9600Hz, sound, and video
– Transmission protocol is CSMA/CA

– Functions:
– SCS bus enables functions like light control, automation, sound diffusion
– Also supports energy management, thermoregulation, video intercom, and alarm system
– All functions share the same technology and installation procedures

– Configuration:
– Devices on SCS bus require manual configuration
– Autolearn not possible except for Alarm system and extenders
– Two configuration types: Physical (using jumpers) and Virtual (using software)
– Physical configuration uses numbered jumpers with different resistor values
– Virtual configuration involves a configuration software connected with an ethernet gateway

– Certifications:
– Devices connected to SCS bus are IMQ-certified
– Comply with product standards such as IEC EN 50428 and IEC EN 60669-1/A1
– Also meet standards like IEC EN 60669-2-1, IEC EN 50090-2-2, and IEC EN 50090-2-3

– Integration:
– Interaction with SCS bus through gateway using OpenWebNet protocol
– Two gateway types: Gateway ethernet (Linux based) and Gateway USB / RS-232
– Gateways are bidirectional, translating SCS frames into OpenWebNet frames
– OpenWebNet protocol shared by MyOpen community for software development
– SCS protocol is a proprietary bTicino protocol, interaction with other field buses requires OpenWebNet.