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PSS 5000 – Technical Manual
2 System Description
es, with their proprietary interfaces. There are 2 basic HIM types, which are
used to communicate with the forecourt devices:
The HIM modules provide a scalable solution. When new devices are added
to the forecourt configuration, or old devices replaced with new ones that use
a different protocol, new HIMs can be added, or existing ones replaced, so that
they suit the new protocol.
For more information about the individual HIMs, see [1].
Illustration of HIMs Examples of a DSB HIM and a DMB HIM are shown below.
Note: The black serial connectors on the DMB modules are wider than those
on the DSB models. This extra width is a result of more pins, which are
required for the signals used to control the onboard multiplexer.
2.1.4 Service and Maintenance
Spare part
recommendations
It is recommended that service organizations carry a stock of spare parts that
represents 5% of the installed systems.
Note: This quantity may vary depending on logistics and the individual re-
quirements to the repair turn-around times.
2.2 PSS 5000 Software
List of software
components
The PSS 5000 software consists of several separate components. These are de-
scribed in the following topics:
• ‘2.2.1 Virtual File System’ on page 15
• ‘2.2.2 Memory Structure’ on page 16
• ‘2.2.3 The Software Components’ on page 17
• ‘2.2.4 Web Server’ on page 18
• ‘2.2.5 FTP Server’ on page 18
• ‘2.2.6 Network Connection’ on page 19
Module Description
DSB Doms Serial Bus modules are used for addressable
devices.
DMB Doms Multiplexed Bus modules are used for non-ad-
dressable devices.
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