Loop-Through Of The Profibus Dp And Power Bus; How To Loop The Profibus Dp And The Supply Voltage - Siemens SIMATIC ET 200eco Manual

3.4.5

How to loop the PROFIBUS DP and the supply voltage

Properties
The terminal block is equipped with one plug for the power bus, one socket for
looping the power bus and one socket for PROFIBUS-DP. The power bus
connector and the loop–through socket are interconnected internally.
Result: If you disconnect the terminal block during runtime the downstream
PROFIBUS nodes can continue operation.
Disconnect the terminal
block from the I/O
module!
Loop–through of the power
bus + PROFIBUS DP
Figure 3-11
Caution
You may only disconnect the terminal block during ET 200eco runtime if none of
the outputs are connected to the power supply. Always switch off the load voltage
supply (2L+) before you disconnect the terminal block. Protection class IP 65, IP
66 or IP 67 is no longer guaranteed after removal of the terminal block.
Notes on wiring
• When you wire your system, always take into account the influence of cable
lengths on the ET 200eco power supply (permitted tolerance, see Chapter 5.4).
Example of the terminal interface ECOFAST:
The voltage loss across a
is proportional to 0.25 V at 1 A.
• The maximum power rating
– of the ECOFAST terminal block is 8 A at 1L+ and 10 A at 2L+
– of the M12, 7/8" terminal block is 6 A at 1L+ and 8 A at 2L+
These values must not be exceeded.
ET 200eco Distributed I/O Station
A5E00158716-02
ET 200eco (DP Slave 1)
isolated from PROFIBUS DP
ET 200
eco
Loop–through of the PROFIBUS DP and power bus
1.5 mm
ET 200eco ET 200eco
(DP Slave 2) (DP Slave 3)
ET 200 ET 200
eco eco
2
cable of 10 m length is 2.5 V at 10 A. This
Wiring
3-27