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scenes per control unit can be
programmed
–
Unidirectional: reports only faulty lamps
(depending the technical design the
electronic ballast)
–
Two-wire control line (potential-free,
polarity-free, unshielded, terminal
resistors)
–
Application: general lighting (small number
of lighting points, static light)
.
–
With DSI (and 1–10 V), only unidirec
tional
flow information (from the controller to
the controlled unit) possible.
DSI: Features
–
Usable data transmission rate: 1200 bit/s
–
Depending the output module:
10 100 control units per control circuit
– Max.
–
DSI not building management bus sys-
tem, but protocol for digital addressing of
technical lighting control gear.
–
DSI the predecessor DALI with the
main goal replacing analogue addressing
(1–10 control gear with digital
addressing.105
The Lighting Handbook
DSI: General information
–
The term DSI stands for “Digital Serial
Interface”.
–
Devices with DSI and DALI connection are
not compatible and cannot used jointly
in one control circuit.
–
DSI manufacturer-specific interface
defined Zumtobel.
–
With DSI, units are allocated groups
by wiring; with DALI, group allocation is
performed via software.
–
DSI and DALI units cannot operated
jointly one control circuit.
Differences between DALI and DSI
–
Each DALI control unit may have different
intensity levels, while all DSI (and 1–10 V)
control units always have the same inten-
sity level
