REV 0, June 2005Page 24
Operation Manual SUPREMA
3. Description of the System
3.2 Expansion Stages
In the minimal version for 8 inputs, the following units are to be used:
• MDA Module Data Acquisition Module
• MAI Module Analogue Input Module
• MCI and/or MPI Module (maximum of 8 on one MAI card)
• MCP Module Central Processing Module
• MGO Module General Output Module
• MRO 8 Module Relay Output Module (Common Alarms)
• MDO Module Display + Operation Module
• MFI Module Fire Input Module
• MSI Module Switch Input Module
• Rack
• Supply Voltage
By integrating additional units of the type listed above, a system can be expanded to handle as
many as 256 sensors and as many as 512 relay driver outputs.
Redundant systems for higher safety classes are realised by adding up to two more CENTRAL
PROCESSING units (MCP modules), a double set of the appropriate data acquisition (MAR
and MDA) and alarm control modules (MGO), a second CAN bus and a second or third voltage
supply.
(see section Redundant Systems)
3.3 System Design Variants
• 19” racks for 8, 16, 24, 32, or 64 sensors
• System modules installed in racks and wall assembly
3.4 Data Exchange between the Modules
The field bus for the gas warning system has the following features:
• Defined standards (ISO, OSI)
• Secure transmission
• Supportive manufacturers and users
• Readily available hardware and software components
• Widespread acceptance and use
• Rapid data exchange
• Low cost per network node in future expandable
The CAN bus satisfies all these criteria. It is therefore obvious that this bus is a safe decision
for the future. An increasing number of applications in other branches of industry demonstrates
that the CAN bus is being recognised as an economical platform for nearly any type of
communications in mobile systems, industrial automation, and measurement technology.
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