ISOSTEM USER MANUAL
44 ISOSTEM® Live - Integration
Daisy-Chained Setup:
ISOSTEM#2
DSP
Super-
visor
4
x
A
E
S
-I
N
4
x
A
E
S
-O
U
T
ISOSTEM#1
DSP
Super-
visor
4
x
A
E
S
-I
N
4
x
A
E
S
-O
U
T
6 x GPI-
PRESET
L
IN
K
L
IN
K
Example: ISOSTEM #1 processes, ISOSTEM #2 bypasses, no alarm
The alarm state overrides this situation: An alarm always forces the bypass
state. The block diagram below presents an example of an alarm situation
for
ISOSTEM
®
#1.
ISOSTEM#1
DSP
Super-
visor
4
x
A
E
S
-I
N
4
x
A
E
S
-O
U
T
4
x
A
E
S
-I
N
4
x
A
E
S
-O
U
T
6 x GPI-
PRESET
LI
N
K
LI
N
K
ISOSTEM#2
DSP
Super-
visor
Example showing ISOSTEM #1 in alarm state
(ISOSTEM #1 bypasses, ISOSTEM #2 processes)
All possible situations in linked mode are:
No alarm: One device processes (in our example
ISOSTEM
®
#1), the other
is the backup – it bypasses audio.
ISOSTEM
®
#1 with alarm,
ISOSTEM
®
#2 no alarm: The backup
ISO-
STEM
®
#2 takes over and processes, whereas
ISOSTEM
®
#1 bypasses
and signals its failure state by LED and alarm relay.
ISOSTEM
®
#2 with alarm (the backup device),
ISOSTEM
®
#1 no alarm:
The backup-device
ISOSTEM
®
#2 cannot provide backup any more but of
course stays in bypass. It signals its failure state by LED and alarm relay.
ISOSTEM
®
#1 and
ISOSTEM
®
#2 with alarm: Both devices are forced to
bypass audio – i.e. the audio chain is not disconnected, but no ISO-
processing is made. Both devices signal their failure state by LED and
alarm relay.
