This European Standard specifies the control network protocol (CNP) free-topology twisted-pair channel for networked control systems in commercial Building Automation, Controls and Building Management and is used in conjunction with EN 14908-1:2014. The channel supports communication at 78,125 kbit\/s between multiple nodes, each of which consists of a transceiver, a protocol processor, an application processor, a power supply, and application electronics.<\/p>\n
This European Standard covers the complete physical layer (OSI Layer 1), including the interface to the Media Access Control (MAC) sub-layer and the interface to the medium. Parameters that are controlled by other layers but control the operation of the physical layer are also specified.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 5<\/td>\n | Foreword <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | Introduction <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | 1 Scope 2 Normative references 3 Network overview 4 System specifications 4.1 General aspects 4.2 Cable 4.3 Topology 4.3.1 Free or bus topology <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 4.3.2 Repeater 4.4 Cable termination 4.4.1 Free-topology segment 4.4.2 Bus topology segment Figure 1 \u2014 Termination 4.5 Segment configuration <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | Table 1 \u2014 Bus-topology distance specifications Table 2 \u2014 Free topology distance specifications 4.6 Power specifications 5 Link power 5.1 General 5.2 Source <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | Figure 2 \u2014 Link Power Source 5.3 Power supply requirements <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | Table 3 \u2014 Power supply requirements <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Figure 3 \u2014 Power supply output ripple voltage requirement Figure 4 \u2014 Power supply start-up interval behaviour 5.4 Passive coupler circuit <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | Figure 5 \u2014 Coupler circuit schematic Table 4 \u2014 Coupler circuit bill of materials <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 6 Node specifications 6.1 Link power Table 5 \u2014 Link power requirements 6.2 Hot plugging 6.3 Transmitter\/receiver interface to the MAC sub-layer 6.3.1 Physical layer protocol data unit Figure 6 \u2014 Physical layer protocol data unit 6.3.2 Frame format <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Figure 7 \u2014 Frame format for compliant transmitter 6.3.3 Transmit waveform <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Figure 8 \u2014 Idealised transmit waveform – zero bit Figure 9 \u2014 Idealised transmit waveform – one bit <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Figure 10 \u2014 Maximum voltage spectrum over frequency relative to peak 6.4 Impedance <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Figure 11 \u2014 Minimum impedance \u2013 powered and unpowered node 7 Communication parameters <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Table 6 \u2014 Communication parameters for interoperable transceiver <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Annex A (informative) Environmental specifications Table A. \u2014Representative environmental specifications for nodes <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Open Data Communication in Building Automation, Controls and Building Management. Control Network Protocol – Twisted Pair Communication<\/b><\/p>\n |