Siemens SIDOOR AT40 System Manual page 138

Controllers
6.6 Connecting terminals and interfaces
Connection
Risk of injury from dangerous electrical voltages
When the housing cover of the controller is open, only a safety extra-low voltage of less
than 42 V may be present. The protective cover provided must be used when a higher
voltage (max. 230 V AC) is connected to the relay module. Please follow the procedures
described below for connecting a relay module.
Terminal circuit diagram of the relay contacts
Procedure
Note
Specifications for connecting the relay module
• The cables connected must be suitable for the voltage used and have appropriate
(double or reinforced) insulation. Cables with an external diameter of 6 to 7 mm are
recommended.
• Components of the controller and connecting cable, such as the motor plug and its wires,
may only come in contact with the additional (or reinforced) insulation of the current-
carrying wires.
• Networks with different voltages (for example 24 V and 230 V) must not be connected to
the relay module.
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DANGER
AT40, ATD400V, ATD400K, ATD4xxW, ATD400S, ATE250S, ATD400T
System Manual, 06/2016, A2B00096162-AN