UK
Field modules DP
23
– Cable lengths and power losses on the cables
(see chapter Power loss of power cable)
– If power is fed through, make sure that the maximum permissible current of
4 A / pin is not exceeded�
7.5.1 Power loss of power cable
When using power cables do not exceed a total length of 15 m at 4 A (with power
feed-through)�
When connecting the modules to 24 V DC please observe that the functionality of the modules
cannot be ensured from a voltage drop of 6 V�
Voltage fluctuations of the power supply also have to be taken into account�
Example: At a load of 4 A an 8 m power cable with 0,34 mm² has a voltage drop of
3�2 V�
Voltage loss
7.6 Start-up behaviour of the modules
During start-up of the module the I/O LEDs illuminate and flash� In an error-free
condition the I/O LEDs should stop flashing after 2-3 seconds� If an error has
occurred, it depends on the type of error which LED starts flashing�
