NEN EN 14908-2 : 2014

Foreword
Introduction
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
      4.3.2 Repeater
  4.4 Cable Termination
      4.4.1 Free-topology Segment
      4.4.2 Bus Topology Segment
  4.5 Segment Configuration
  4.6 Power Specifications
5 Link Power
  5.1 General
  5.2 Source
  5.3 Power Supply Requirements
  5.4 Passive Coupler Circuit
6 Node Specifications
  6.1 Link Power
  6.2 Hot Plugging
  6.3 Transmitter/Receiver Interface to the MAC Sub-Layer
      6.3.1 Physical Layer Protocol Data Unit
      6.3.2 Frame Format
      6.3.3 Transmit Waveform
  6.4 Impedance
7 Communication Parameters
Annex A (informative)
Environmental Specifications
Bibliography

Defines the control network protocol (CNP) free-topology twisted-pair channel for networked control systems in commercial Building Automation, Controls and Building Management.