Description
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PPC380AE02 The Safeguard 400 Series remote inputs can be physically connected on addressable loops to
Autronica BS-100 or Fireguard ANX95i fire alarm panels for fire detection. Each panel has a
connection to each of the controllers in the PPC380AE02 Safeguard 400 Series on the CI 531 sub-module. A
maximum combination of four fire alarm panels can be connected to one Safeguard 400 Series
unit, meaning two CI 531 sub-modules per safety controller.
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The Safeguard 400 Series is used with Master Bus 300 and can be configured for single or
redundant buses. To maintain the availability of the safety system it is strongly recommended
that a redundant MasterBus 300 network and a redundant connection (one connection to each
MB 300) for both safety controllers in the PPC380AE02 Safeguard 400 Series is implemented.
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To support this recommendation, Safeguard 400 Series is configured with a
redundant MasterBus 300 interface connection as a standard. See Basic unit
Safeguard 400 Series Table 4-15 above.
The network does not affect basic system operation and is not necessary for operation of a
Safeguard 400 Series unit, however the network is used to update system status between
branches after maintenance or other system restart actions. The network is used to exchange
operator information with AS 500 series operator stations during normal operation.
If the user application is made dependent upon MB 300 communication, e.g. through the Cause
& Effect remote shutdown function between Safeguard 400 Series units, a redundant MB300
network must be used to obtain a tolerance against single fault throughout the safety system.
Thus network PPC380AE02 reliability and availability should be designed on requirements for operator
information availability, not system reliability.
The Safeguard 400 Series can share operator stations and networks in Advant OCS (Master). To
take full advantage of the Integrated system design, such a connection is often recommended.
Safeguard 400 Series avoids “contamination” (corruption) of the safety system with a number
of control mechanisms built into the network. Since the ABB Master Net is a full ISO/OSI
7-layer model implementation, these checks are layered so that even if erroneous information
should enter the system on a lower level, it will be detected and discarded on some higher level.
Some of these mechanisms are:
- The Physical and Data link layers uses a CSMA/CD protocol with CRC check-sum
according to IEEE 802.3 and 802.2
- The transport layer is an ISO class 4 implementation with a calculated residual error rate of
one message per 1014 messages.
- The application layer is protected by system authorization, as described under operator
stations “System Security”.
In addition, to cause contamination, the message must contain meaningful information to the
configured application. It can therefore be concluded that safety integrity cannot be disturbed by
other computers on the data highway. The operator can be prevented from performing illegal
actions by proper configuration of system access rights.
Other forms of network contamination, such as computer virus cannot enter the control network
or Safeguard 400 Series units due to the use of proprietary Network Protocols and Operating
Systems on this level.
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The standard power for Safeguard 400 Series is configured with two power systems; one for
system power and one for field devices. The power system is modularized with input voltages
18-72V DC, 110/230V AC or 110V DC and output voltages 24V DC 10A or ±12V DC 10A.
The power system is prepared for redundant mains connections (Main I and Main II).
Mains and field distribution units are installed.
The mains distribution unit is designed for two incoming main supplies. The selection of the
power rack type is dependent of the selected type of field power configuration.
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This provides power for the CPU and I/O racks as well as the internal control voltages for the
Master Vote 3000 output units. Since the Safeguard 400 Series is a dual system, this in itself,
gives redundancy in the power supply and each side is configured for the nominal current
consumption, i.e. one module for the central rack only and two modules with up to two
additional I/O racks.
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