Only required if the associated transducer does not have its own UH but is connected to 230 V AC or 110 V AC +/-20%
Options
Auxiliary supply 24 V DC or 6 - 30 V AC+DC or 36 - 265 V AC+DC
The relay module can be used in conjunction with a transducer to monitor a set limit value so that a relay is triggered when that value is exceeded. The module is hard-wired to the transducer.