Operation Liquiline CM442/CM444/CM448
82 Endress+Hauser
10.5 Binary inputs and outputs
The optional "DIO" hardware module with 2 digital inputs and 2 digital outputs enables the
following:
• via a digital input signal
– measuring range switching for conductivity (upgrade code required, see accessories)
–an external hold
– a cleaning interval to be triggered
– a PID controller to be switched on and off, e.g. via the proximity switch of CCA250
– the use of the input as an "analog input" for pulse-frequency modulation (PFM)
• via a digital output signal
– the static transmission (similar to a relay) of diagnostic states, point level switch states etc.
– the dynamic transmission (comparable to a non-wearing "analog output") of PFM signals,
e.g. to control dosing pumps.
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