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4.1 Cabling
A remote control system consists of three different components:
remote control master (
RCM
)
remote control slave (
RCS
)
remote control connection
The
RCM
is the central computer which controls the slave devices
RCS
. All control messages are gener-
ated by the
RCM
, addressed to a certain
RCS
device and sent on. Incorrect messages are processed by a
RCS
and directed to the
RCM
without request.
All
RCS
are connected in series. Messages sent from the
RCM
are passed on by an
RCS
to the next
RCS
,
and finally return to the
RCM
. The messages run in a ring.
The
RCM
must be connected to each
RCS
in series. For a clear lay-out of the cabling the different types
of
RCS
should be arranged into blocks within the ring, e. g. all H
ERMES
DXD first, then all illumination
units.
4.1.1 Cabling of Hermes DXD (number of devices < 20)
The serial interface of the
RCM
(COM1) must be connected to the
Remote In
socket of the first H
ERMES
DXD. Each following H
ERMES
DXD (
Remote In
) is connected to the previous H
ERMES
DXD (
Remote
Out
). This kind of connection is called daisy chain.
Figure 4-1
Remote Control Interfaces
Figure 4-2
Daisy chain cabling of devices
A shorting plug must be inserted into the
REMOTE OUT
socket of the last device in
order to close the ring.
If the internal logic control of a
RCS
detects an error, or if a device is switched off, the input and output
of its remote control interface are short-circuited, such that all other remote control devices can still be
addressed. Pay attention that during the addressing procedure all
RCS
are active, in order to prevent
confusion in the addresses
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