Siemens SIMATIC ET 200eco PN - Technical specifications of the lines

Wiring
3.4 Technical specifications of the lines
ET 200eco PN
34 Operating Instructions, 08/2016, A5E01250250-AJ
Connection of a digital output to a digital input
WARNING
When a digital output is connected to a digital output, the respective potential groups have
to be observed. Depending on the configuration, 1M and 2M may then be connected,
resulting in elimination of the galvanic isolation between 1L+ and 2L+.
Line protection
Line protection is required in accordance with DIN VDE 0100, i.e., you must always provide
external fusing.
The power supplies of the I/O device must be fused using a 24 V DC/4 A miniature circuit
breaker with tripping characteristic type B or C.
The power supplies of the terminal block must be fused using a 24 V DC/10 A miniature
circuit breaker with tripping characteristic type B or C.
The power supplies of the voltage distributor must be fused using a 24 VDC / 8 A miniature
circuit breaker with tripping characteristic type B or C.
3.4
Technical specifications of the lines
Influence of cable length on the supply voltage
● If you are wiring your configuration, then you must take into account the impact of cable
length on the supply voltage to the ET 200eco PN.
Example
A 10-m cable with Ø 0.75 mm
2
has a resistance of 0.5 Ω, which corresponds with a
voltage drop of 2 V at a load of 4 A.
CAUTION
If you do not adhere to the maximum infeed currents and the cable cross-sections
required for these currents, you will risk overheating the cable insulation and contacts,
and damage to the device.