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6.3
Auxiliary circuits
6.3.1
Selecting cables
Take the following criteria into account when selecting the connecting cables for the auxiliary
circuits:
● Rated current
● Rated voltage
● System-dependent conditions, such as ambient temperature, routing type, cable cross-
● Requirements according to IEC/EN 60204‑1
6.3.2
Connecting an external fan
Preconditions
● Only use cables that comply with the relevant installation regulations regarding voltage,
● Before connecting the device, make sure that the line voltage matches the device voltage.
● Check whether the data on the fan rating plate matches the connection data.
● Cable glands are not included in the scope of supply. Close unused cable entries,
● The line voltage corresponds to the quality attributes laid down in DIN EN 50160 and the
Procedure
1. Open the terminal box of the external fan and route the cables into it. The cables are not
2. Connect the protective conductor (PE).
3. Connect the other cables to the relevant terminals, refer to the connection diagram in the
SIMOTICS M-1PH8 1PH818., 1PH822., 1PH828.
Operating Instructions 10/2017
section as defined by required length of cable, etc.
current, insulation material, and load-carrying capacity.
otherwise, the degree of protection is not maintained.
defined standard voltages laid down in DIN IEC 60038.
included in the scope of supply.
terminal box.
Connection cables must not be subject to excessive tensile stress.
Note
For fans equipped with EC motor, the fan motor starts with a delay after the line voltage is
connected.
Electrical connection
6.3 Auxiliary circuits
75
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