Siemens SINAMICS G120P, Operating Instructions Manual

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Electrical installation
4.7 External Supply of the Auxiliary Supply from a Secure Line
Inverter cabinet units
70
Operating Instructions, 12/2014, A5E32923362A
4.7 External Supply of the Auxiliary Supply from a Secure Line
Description
An external auxiliary supply is always required when the 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.
WARNING
Danger to life due to dangerous electrical voltage from an external auxiliary supply
When the external auxiliary supply is connected, dangerous voltages are present in the
cabinet unit even when the main circuit-breaker is open. Touching live parts can result in
death or severe injury.
• Observe the general safety rules when working on the device.
Note
External auxiliary supply for automatic restart
An external auxiliary supply (infeed) must always be used if the automatic restart (WEA)
function is to be used with integrated EMERGENCY OFF option (L57) or EMERGENCY
STOP option (L60).
Otherwise, the automatic restart function does not work.
Table 4- 5 Connection options for the external auxiliary voltage depending on the selected type and
options.
Cabinet unit type and options External supply of auxiliary voltage independent of the main supply
24 VDC
Terminal –X9
230 VAC
Terminal –X40
- With no further options
- Type C X -
- Option L13
- Option L57, L60
- Type A and option M23, M43,
M54
- X