Additional references
Further information on the GSM modem can be found in the following books included on the
enclosed product CD:
● "SIMATIC NET GPRS/GSM modem SINAUT MD720-3" system manual:
– Inserting the SIM card
– Connecting the device and starting up
– Service functions
● "SIMATIC NET Quad-Band GSM Antenna SINAUT 794-4MR" Operating Instructions:
Mounting the antenna
9.2 PN/PN coupler
9.2.1 Principle of operation
Application
The PN/PN coupler is used to link two Ethernet subnets with one another and to exchange
data. The maximum size of the data that can be transferred is 16-byte input data and 16-byte
output data.
As a device, the PN/PN coupler has two PROFINET interfaces, each of which is linked to a
subnet. During configuring, two I/O devices are made from this one PN/PN coupler; this means
that there is one I/O device for each station with its own subnet. The other part of PN/PN
coupler is called the coupling partner. Once configuring has been completed, the two parts
are merged.
Example
The following example shows that the two networks are independent of one another. This
means that for each PROFINET IO network you assign dedicated device names.
In the following diagram, these are the device names "Subnet1" in network 1 and "Subnet2"
in network 2.
Spare parts and accessories
9.2 PN/PN coupler
PPU
Manual, 01/2014, 6FC5397-2DP40-3BA3 229
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