Technology

DALI Solution

Systel PLC does not need rewiring in retrofit. DALI does. DALI installation is therefore expensive.
DALI is at a "room" system level because of its addressability limitation. Systel PLC is practically unlimited addressing wise, and it is therefore at the system level.
Systel PLC set of commands emulates the DALI set of commands, thus DALI programming is transportable into Systel PLC.
Systel PLC has ERCC and therefore the communication has controlled command error rates

Comparison Parameter	DALI	Systel's PLC-link™
Physical layer	Two control wires	Power line carrier
Requires rewiring in retrofit	Yes	No
Communication method	Bi phase	Direct Series Spread Spectrum
Two way	Yes	Yes
Implementation	A stand-alone light control system or a “room” level component of a building system	Floor or wide area network of a BMS or as a stand-alone network for Light control, HVAC, Security, Fire protection and other environmental applications, as well as, for residential network control system for same applications.
Bandwidth	N/A	100 - 200 kHz carrier frequency
Bit rate	1200 bit/sec	2000-4000 bit/sec
Message length	16 bits	32 bits

Addressable ballasts individually	64	256
Addressable zones	16	4096
Light scene storage	16 scenes per controller	16 scenes per zone
Broadcast addressing	Yes	Yes
Lighting curve	Logarithmic	Can be defined by customer
RF communication for remote control	By external add-on	Inherent in the controller together with the PLC
Sensors connected to:	If connected to Main DALI Controller, require long dedicated wiring	Sensors connected to the nearest Local Control Unit (Wall Control) or to the nearest ballast that comprises Local Control Unit capabilities. This option also saves the installation of the Wall control
Bi directional protocol	Yes	Yes

Communication Protocol type	DALI	PLC-Link™ Systel property - anti-collision type
Error Code Correction (ERCC) NA	N/A	Yes
Bit Error Rate @ S/N= 6 dB before ERCC	N/A	10-10 (for 64 ballast per circuit)
Erroneous commands probability at S/N = 6 after ERCC	N/A	2*10-18
Local ID	8 bits	11 bits
Message transmission time	39.2 msec	16 msec
Execution time (search of 32 ballasts)	10 Sec	16ms x 32 = 0.5 Sec
Query capability	Limited by protocol and ballast design	Unlimited. All information is available in IDC for transmission

Lighting Control System configuration	The ballasts are controlled by Master Unit only.	All addressable units are able to be controlled by any of the Local Control Units installed at any convenient place and by RF remote control as well.
Installation Pay Back time (approx.)	> 5 years	2 years