Operating Instructions
IS1 PROFIBUS 3.00 E
- Technical alterations reserved -
5
PROFIBUS DP interface for IS1+
1 System Overview
1.1 Connection principle of IS1+ field stations to the PROFIBUS
As an off-the-shelf explosion protected mounted unit, the IS1+ field station can be installed directly in the
hazardous area (Zone 1 or Zone 2 and Division 1 or Division 2). It can also be installed in the safe area. The
diagram above shows a Zone 1 solution.
The IS1+ field station has several interfaces. One of them is used to connect to an automation system
(Process Bus) and the second interface can be used as a bus-capable maintenance interface for the
configuration, error diagnosis and communication with HART field devices.
This functions can optionally be used via FDT technology and IS1 DTMs. Communication via PROFIBUS or
Service Bus DTMs is used in this case.
In addition, the 9442 CPU has an Ethernet interface. Diagnostics and firmware update functions are
available here via Web Server.
Several IS1+ field stations can be used in the hazardous area to form a PROFIBUS DP network that is
connected directly - both hierarchically and topologically - with the PROFIBUS network in the non-hazardous
area.
The following applies to Zone 1 installations:
From a safety-engineering aspect relating to explosion protection, the field bus isolating repeater for the
PROFIBUS takes on the function of a “barrier” between the Ex area and non-hazardous area.
The PROFIBUS installed in the hazardous area is using the RS 485-IS standard.
In such a PROFIBUS DP network, the IS1+ field station behaves hierarchically as a PROFIBUS slave where
the configuration of the field station is performed via the PROFIBUS master. Optional extended diagnostic and
parameterizing functions can be provided via PC-supported configuration programs (IS1 DTM via PROFIBUS
DP or IS Wizard via Servicebus).
