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8.1.3 Example connection of one AUX-output
In this case the home automation system’s logic input is pulled to ground potential
when the AUX-output signal is active. Note that the maximum current pass in the
optocoupler is 10 mA!
+3 ... +24 VDC provided by the
automation system
Pull-up recommended to provide
~1mA (absolute max. 10mA)
Logic input of the automation
system
Signal ground of the
automation system
IN
OUT
SAFERA
The diagram illustrates the connection of one AUX channel. AUX1 and AUX2 are similar.
HINT
Most building automation systems are equipped with inputs that are designed
in a way that they do not need the pull-up resistors. One example of this kind
of input is a 2-terminal input designed for connecting between relay contacts
(potential free connection). In this kind of situation the AUX can usually be wired
directly to the automation system. The only thing that must be observed is the
current flow direction (IN >OUT) and that the current passing through must be
limited to less than 10 mA by the automation system.
8.1.4 AUX-signal logic interpretation
The AUX-signals can be interpreted in many ways:
• Simple ON/OFF information for any type of alarm (heat, fire or water leak). This
can be read directly from AUX1 output.
• Simple ON/OFF information for cooking activity. This can be read directly from
AUX2 output.
• Simple ON/OFF information for a fault condition. This can be read directly when
both AUX1 and AUX2 are connected in series to the same line.
• Four-state output according to the table below. This can be used by reading both
AUX1 and AUX2 separately into the automation system and using internal logic
to decide the state.
Summary of Contents for PCU6.3-F
Page 11: ...11 L OUT N N L OUT IN IN PE OFF 1 2 6 4xA A A A B 4 2xB 3 5 OUT X IN...
Page 31: ...31...
Page 32: ...32...
