Installation
5.2 Output-side connection
SITOP PSU300M/300B
Manual, 11.2014, C98130-A7574-A2-2-7629
37
5.2
Output-side connection
At its output, the SITOP PSU300M/300B power supply provides an isolated (= non-
grounded) SELV output voltage (Safety Extra Low Voltage). The output of the power supply
is no-load, overload, and short-circuit proof. If an overload occurs, the electronic current
limiting function limits the output current to a maximum value (see Section Technical data
(Page 39)).
Figure 5-2
Output connection (example 6EP1456-3BA00 / 6EP1437-3BA20)
The output voltage is connected via the + and - terminals at the output of the power supply
(see Figure 5-2 Output connection (example 6EP1456-3BA00 / 6EP1437-3BA20)
(Page 37)). Ensure that the output cables are dimensioned correctly for the maximum output
current rms value and fused accordingly.
Note
If the safety concept of the plant or system specifies that the DC output circuit should be
grounded (PELV), then it is permissible that the output voltage of the SITOP power supply is
grounded. In this case, ideally, the grounding at the output should be directly connected from
terminal "-" of the power supply to a suitable connection point of the protective conductor
system (PE) of the plant or system.
