Product description
User manual 58185_TREE M4/6-TX PN IP20_hdb_en_10
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3.1.4
Power supply
Power supply
An integrated supply unit regulates the voltage required for the device. The ex-
ternal 24 V DC power supply is connected to the device using the four-pole
connector. The device has an integrated reverse polarity protection system.
3.1.5
Alarm contact on TREE M-6TX PN
TREE M-6TX PN
contains an alarm contact (see Fig. 3-4: and Fig. 3-5: ).
Selectable ports can be monitored for link-downs. A signal/alarm is generated
whenever a link-down occurs.
NOTE
Link-downs occur when the connectors are removed from the ports or if the
connection to the device is interrupted, e.g. if there is a break in the cable.
NOTE
The alarm contact can be deactivated in the webserver to avoid false alarms
(see 11 "Web server").
3.2
PROFINET IO Communication
IEC 61784-2
PROFINET IO is an open communication protocol that complies with IEC
61784-2. The communication protocol is based on Ethernet.
Data exchange
Data is exchanged between the control unit, referred to as the PROFINET IO
Controller, and connected users, which are called PROFINET IO devices.
Communication
Communication is based on a full-duplex Ethernet network running at
100 Mbit/s. IO controllers and IO devices communicate by means of Ethernet
telegrams. Devices exchange data cyclically based on the provider-consumer
principle. Devices function as receiver (consumer) and transmitter (provider)
at the same time.
The IO controller sends output data to the IO devices and receives input data
from the IO devices. The IO devices send input data and receive output data.
Other components of the communication protocol include telegrams in form of
acyclic communication for parameter transfer and read/write access to the
I&M data or manufacturer-specific features.
3.3
Structure of the conformance classes
Structure
The scope of functions of PROFINET IO is clearly classified in "Conformance
Classes" (CC). These classes give a clear overview of the various minimum
properties. There are three conformance classes:
Fig. 3-4: Alarm contakt
Fig. 3-5: Principle diagram
n.c.
K3
K2
K1
n.c.
K3
K2
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12
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