FMS EMGZ622A, Operating Manual

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Operating Manual EMGZ622A/642A
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11 PROFIBUS Interface Description
11.1 Wiring of the PROFIBUS Data Cable
Wiring of the PROFIBUS cables
The standardized PROFIBUS cable type A (STP 2x0.34
2
) [AWG] has to be used for the
PROFIBUS data cable. The cables are bared referring to fig. 6 and connected to the terminals
according to the wiring diagram.
The shield is connected with the bracket to the shoulder inside the housing.
Caution
The shield of the PROFIBUS cable is only grounded if the PG-gland connector is properly
mounted. The bracket inside the housing must directly clamp the shield. The plastic isolation
has to be fixed only with the PG-gland (referring to fig. 6)
Termination
If both cables are connected (Bus in and Bus out), if has to be ensured that the two termination
dip switches are in off position.
If only one cable is connected (Bus in), both termination dip switches have to be set in on
position.
EMGZ600
main board
(red)
(red)
(green)
(green)
(colour codes SIEMENS)
fig.15: Profibus board E621009 fig.16: connection setting Profibus E621012e
Note
The PROFIBUS network has to be terminated properly. Otherwise the installation cannot be
set into operation. It has to be ensured that only the last device of the PROFIBUS chain is
terminated.
11.2 Setting the PROFIBUS Address
The measuring amplifier requires a unique PROFIBUS address which indicates it definitely in
the whole PROFIBUS network. Therefore no other PROFIBUS device in the network may use
the same address. The address has to be between 2...125.
The PROFIBUS address is set with the system parameter
Identifier . (See 14.4 Description of
the system parameters). After switching the measuring amplifier off and on, the new address is
valid.