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PROTECTED AREA
When installing a cascade system detection capability at the edge of each unit depends
on how cascade units are linked with each other. If the proper cascade brackets are used
detection capability at the edges can be calculated according to brackets documenta-
tion. In both 30mm and 14mm resolution unit user can always achieve less then 40mm
resolution.
OPERATION
A proprietary transmission protocol is used to communicate both Slaves safety related
information and status info.
OSSDs are connected to (and thus controlled by) Master unit only.
The redundancy of information and a series of data integrity checks guarantee that
safety critical parameters are correctly transferred between cascade units. If that trans-
mission fails due to a stuck at fault or a signal degradation both master and slaves unit
stops into Communication Failure Lockout.
A maximum of one master and two slave units (M+S
cade.
14mm and 30mm resolution can be mixed in a cascade system and as described in the
previous chapter,
MASTER
MID SLAVE (optional)
LAST SLAVE
a. Only for Advanced models and depending on their configuration, it is possible to have muting
Cascade Topology (units' number, length and resolution) is auto-detected at start-up
and stored in light curtain memory for safety reasons. If topology is changed, a Reset to
Factory Configuration must be performed for Standard Muting master models or a new
GUI parametrization for Advanced master models before the new cascade can be oper-
ated.
cascade system must have the following topology:
UNIT
connections.
NOTE: Refer to paragraph "Factory Reset" on page 43 to reset the
Advanced master models.
+S
) can be connected in a cas-
1
2
ALLOWED SH4 MODELS
SH4-XX-XXXX-SM-8-5 Standard Muting
SH4-XX-XXXX-A-12-5 Advanced
SH4-XX-XXXX-C-5-5
a
SH4-XX-XXXX-B-5
SH4-XX-XXXX-C-5-5 (for muting connection)
PRODUCT REFERENCE GUIDE
PROTECTED AREA
133
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