External Supply Of The Auxiliary Supply From A Secure Line - Siemens SINAMICS S150 Operating Instructions Manual

4.7

External supply of the auxiliary supply from a secure line

Description
An external auxiliary supply is always recommended if communication and closed-loop
control are to be independent of the supply system. An external auxiliary supply is
particularly recommended for low-power lines susceptible to short-time voltage dips or power
failures.
With an external supply independent of the main supply, warnings and fault messages may
still be displayed on the operator panel and internal protection and monitoring devices if the
main supply fails.
When the external auxiliary supply is connected, dangerous voltages are present in the
cabinet unit even when the main circuit breaker is open.
NOTICE
An external auxiliary supply (infeed) must always be used if the automatic restart (WEA)
function is to be used with integrated EMERGENCY STOP option (L57, L59, L60).
Otherwise, the automatic restart function does not work.
The maximum fuse rating is 16 A.
The connection is protected inside the cabinet with 5 A.
Connection
● On terminal block -X40, remove the jumpers between terminals 1 and 2 as well as 5 and
● Connect the external 230 V AC supply to terminals 2 (L1) and 6 (N).
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A
DANGER
6.
4.7 External supply of the auxiliary supply from a secure line
Electrical installation
59