Connecting Cables For Et 200Eco Pn M12-L - Siemens SIMATIC ET 200eco PN M12-L System Manual

Figure 7-4 Connecting the functional earth
NOTE
Earthing with non-conductive mounting substrate
Make sure there is a low-impedance connection between the I/O device and the functional
earth.
Reference
You will find more information on installing the I/O devices in the section Mounting (Page
39).
7.5

Connecting cables for ET 200eco PN M12-L

Impact of cable length on the supply voltage
When you wire your configuration, you must take into account the impact of the cable length
on the supply voltage of the ET 200eco PN M12‑L distributed I/O system.
Pay attention to maximum incoming currents
For each power supply (1L+, 2L+), you can feed in a maximum of 12 A.
If you exceed the maximum incoming currents and do not comply with the required cable
cross sections, an increased incoming current could lead to overheating of the cable
insulation and the contacts. This could result in damage to the I/O devices.
To estimate the voltage drop in your ET 200eco PN M12‑L distributed I/O system, you must
add the voltage drops of the different cables. For every I/O device used, you must factor in an
additional voltage drop of around 0.3 V.
Example
When using a 10m cable with Ø 1.5 mm
is equivalent to 0.25 V at a load of 1 A.
Distributed I/O system ET 200eco PN M12-L
System Manual, 11/2023, A5E48753295-AG
CAUTION
7.5 Connecting cables for ET 200eco PN M12-L
2
, the voltage will drop by 2.5 V at a load of 10 A; this
Connecting
59