PROFIBUS Power Hub Segment Coupler 3 (SK3)
Glossary
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power conditioner module
Not galvanically isolated Power Hub module for segment
supply.
Power Hub module
Term under which power supply modules and power
conditioner modules as well as diagnostic modules are
subsumed.
power dissipation
Energy produced during device operation which is let off in
form of heat into surroundings.
power supply module
Galvanically isolated Power Hub module which limits voltage
to a given value and supplies the segment with this voltage.
PROFIBUS DP
Brief for "PROFIBUS decentralized periphery". Most often
used PROFIBUS protocol using transmission rates between
9.6 kbit/s and 12 Mbit/s.
PROFIBUS MBP
Brief for "PROFIBUS Manchester-coded bus powered".
Alternative term for PROFIBUS PA.
PROFIBUS PA
Brief for "PROFIBUS process automation". PROFIBUS
protocol using a transmission rate of 31.25 kbit/s. Unlike
PROFIBUS DP, PROFIBUS PA can be used in intrinsically
safe circuits.
redundant coupling
Coupling which is implemented twice, thereby offering
increased reliability. Coupling is performed by 2 gateway
modules on the gateway motherboard.
redundant supply
Supply which is implemented twice, thereby offering
increased reliability. Per segment, 2 power modules supply
field devices.
retry limit
Number of retries that are undertaken before a field device is
interpreted as non-existent by the host.
RS-485
Communication protocol on the PROFIBUS DP segment.
Segment Protector
Junction box by Fuchs with implemented short-circuit
protection.
Segment Checker
Software for designing, calculating and checking for
plausibility of entire fieldbus installations, using a GUI.
spur
A usually short cable which connects the field device to the
trunk.
static revision counter
Counter which is increased by one every time a substantial
change of state occurs. Can be used for status monitoring.
transparent coupling
Coupling in which all PA slaves appear on the DP bus as if
they were DP slaves.
trunk
Main line of a segment. Leads from the supply to the junction
box, where the spurs go off.
watchdog time
Time after which a device is taken out of the cyclic data
exchange.
Zone 0
Zone in which a hazardous, potentially explosive atmosphere
comprised of air and inflammable gases, fumes or fog is
present permanently, over longer periods of time or frequently.
Zone 1
Zone in which during normal operation a hazardous,
potentially explosive atmosphere comprised of air and
inflammable gases, fumes or fog is occasionally present.
Zone 2
Zone in which a hazardous, potentially explosive atmosphere
comprised of air and inflammable gases, fumes or fog is
normally not or only present for short periods of time.
Term
Explanation