© RLS Wacon GmbH ∙ +49 (0)5121 28126 0 ∙ info@rls
-wacon.de
27
Reagent light / horn
A reagent light or horn to signalise a limit violation can be connected to relay 1 / output 1.
Relay 1 / output 1 is energised when the limit value is exceeded and the connection from COM to
NO is made. This position can be programmed in the program as a permanent contact or as a
pulse contact.
Continuous contact on relay 1 / output 1:
Relay 1 / output 1 remains switched in the position (connection from COM to NO) when the limit
value is exceeded until the measured water hardness is below the limit again. Next, the limit value
exceedance is lifted and relay 1 / output 1 is switched back (connection from COM to NC).
Pulse contact on relay 1 / output 1:
Relay 1 / output 1 remains switched in the position (connection from COM to NO) only for a
programmed pulse duration when the limit value is exceeded. Once the programmed pulse
duration expires, relay 1 / output 1 switches back (connection from COM to NC). The next time the
limit is exceeded, relay 1 / output 1 is switched again as a pulse. This function is often used in
combination with pilot distributors.
Programming: Menu > Settings > Outputs > Relay 1
Figure: Terminal assignment when connecting reagent light / horn
The relay 2 / output 2 is used to report detected errors (e.g. optical error, faulty zero sample,
missing supply voltage at the analyzer). If the analyzer is in normal operation and there is no fault,
relay 2 / output 2 is energised and the connection from COM to NO is made. If an error is detected,
the relay 2 / output 2 is deenergised and the connection from COM to NC is established.
Connection of external components
