User advice and safety instructions
Page 6
Version FELD-V2002.02
PROFIBUS manual
1.3 Notes on equipment configuration and installation
Always observe the current safety and accident prevention regulations when
commissioning the equipment.
Install the power, signal and sensor cables so as to prevent electromagnetic
interference from impairing operation of the equipment.
Install automation engineering equipment and installations with sufficient
protection against accidental actuation.
Take suitable precautions in both the hardware and software to prevent any
undefined states of the automation installation in the event of an open circuit.
In installations where major damage to property or even personal injury may
be caused by a malfunction, take suitable precautions to establish a safe
operating state in the event of a fault. This may be achieved using limit
switches, mechanical interlocks etc. for example.
1.4 Symbols
CAUTION:
This information must be observed to prevent damage to the equipment.
WARNING:
Indicates basic conditions that must be observed for fault-free operation.
ESD
(Electrostatic Discharge)
Warning that components are at risk from electrostatic discharge. Take
precautionary measures when handling components at risk from electrostatic
discharge.
Note
Routines or advice for efficient use of the equipment and software
optimization.
i
Further information
References to additional literature, manuals, data sheets and Internet pages.
1.5 Abbreviations
BF
Bus error
DGND Data
transfer potential (reference potential to VP)
GSD
Device description data
PNO PROFIBUS
user
organization
RTS Request
To
Send
RxD/TxD-N Receive/Transmit Data -N, A-line
RxD/TxD-P Receive/Transmit Data -P, B-line
VP
Positive supply voltage (+5 V) for the terminating resistors