Specification
EDN 20 

A. General
i.	The Ethernet Data Node (“Node”) shall be a solid-state device specifically designed to be part of a lighting control system in an architectural or entertainment application.
ii.	The Node shall operate in conjunction with a compatible lighting controller (“Controller”) that it communicates with over an Ethernet network.
iii.	The Node shall receive data from a Controller and output it as DMX512 based on a user-configurable mapping (patch).
iv.	The Operating Software of the Node shall be stored in a dedicated non-removable non-volatile solid-state memory. It shall be possible to update the Operating Software by download from a remote personal computer over an Ethernet connection.
v.	The Node shall automatically connect to a Controller over an Ethernet connection on receiving power without additional external inputs.
vi.	The Node shall have two (2) Ethernet ports – one for connection to a Controller via an Ethernet network and one to allow optional additional Nodes to be daisy-chained.
vii.	There shall be visual indicators on the Node showing status of the device and its ports.
viii.	The Node shall provide twenty (20) DMX512 ports.
ix.	The DMX512 ports shall have surge protection and be capable of restoring output automatically once an external fault condition is cleared.
x.	The Node shall support the Remote Device Management protocol (ANSI E1.20) on each DMX512 port.
xi.	The Node shall support up to 20 Serial Data Interfaces (SDI) for optional output of synchronous and asynchronous serial data
xii.	The Node shall receive data from a Controller and in SDI Mode output it as serial data based on a user-selectable protocol and patch.
xiii.	The Node shall have an address wheel to aid simple addressing of up to 15 devices, with an additional setting that allows addressing to be configured via software.
xiv.	Up to 200 Nodes shall be addressable and able to operate together within a system.
xv.	The Node shall have a recessed switch for resetting the unit without removal of power.
xvi.	The Node shall have an internal watchdog feature that will restart the unit in the event of program failure.
xvii.	The Node shall be provided with a 5 year manufacturer warranty.

B. Physical
i.	Enclosure and mounting shall comply with IEC 60297
ii.	The Node shall be a 1U 19” rack mount enclosure (19” x 1.75” x 7.2”)
iii.	The Node shall use solid-state electronics and memory.
iv.	The Node shall operate in a temperature range from 0°C to 50°C (32°F to 122°F)
v.	The Node shall be rated IP40
vi.	The Node shall be CE compliant.
vii.	The Node shall be ETL/cETL listed.

C. Electrical
i.	The Node shall be designed to support the following wire terminations (0.200” (5.08mm) plug-in rising clamp terminals):
a.	3-pin isolated DMX512 Out, RDM-compatible (20)
and the plug-in rising clamp terminals shall be provided.
ii.	In addition the Node shall have the following standard connectors:
a.	Neutrik etherCON socket (RJ45 compatible) for 100/1000Base-TX Ethernet (2)
b.	IEC socket for 100-240VAC/50-60Hz/0.4-0.2A mains input.
iii.	The DMX512 ports shall be independently galvanically isolated up to 2kV
iv.	The DMX512 ports shall be able to withstand continuous AC voltage up to 300V
v.	The DMX512 ports shall be able to withstand peak impulse voltage up to 650V with duration less than 10ms

D. Software
i.	The Node and associated Controller shall be supported by programming software running on either a PC or Mac platform.

E. Product
i.	The Node shall be the Pharos EDN20 from Pharos Architectural Controls Ltd, London, United Kingdom.