Liquistation CSF33 Operation
Endress+Hauser 105
The following functions can be output via a relay:
• Limit switch status
• Controller manipulated variable for controlling an actuator
• Diagnostic messages
• Status of a cleaning function in order to control a pump or a valve
You can assign a relay to multiple inputs in order to clean several sensors with just
one cleaning unit, for example.
Menu/Setup/Outputs/Alarm relay or relay at channel no.
Function Options Info
Function Selection
• Off
• Limit switch
• Controller
• Diagnostics
• Cleaning
(sensor)
Factory setting
• Alarm relays:
Diagnostics
• Other relays:
Off
The following functions depend on the option
selected.
These versions are illustrated individually in the
following sections to provide a clearer
understanding of the options.
Function = Off
Switches off the relay function and means no
further settings are required.
Outputting the status of a limit switch
Function = Limit switch
Function Options Info
Source of data Selection
Limit switch 1 ... 8
Factory setting
None
Select the limit switch via which the status of the
relay is to be output.
The limit switches are configured in the menu:
Setup/Additional functions/Limit switches.
Use the softkeys ALL and NONE to select
or deselect all the limit switches in one go.
Outputting diagnostics messages via the relay
If a relay is defined as a diagnostic relay (Function = Diagnostics), it works in the "fail-
safe mode".
This means that the relay is always energized ("normally closed", n.c.) in the basic state if
an error is not present. In this way it can also indicate a drop in voltage, for example.
The alarm relay always works in the failsafe mode.
You can output two categories of diagnostic messages via the relay:
• Diagnostic messages from one of the 4 Namur classes
• Diagnostic messages which you have individually assigned to the relay output
A message is individually assigned to the relay output at 2 specific points in the menu:
• Menu/Setup/General settings/Extended setup/Diagnostics settings/Diag. behavior
(device-specific messages)
• Menu/Setup/Inputs/<Sensor>/Extended setup/Diagnostics settings/Diag. behavior
(sensor-specific messages)
Before being able to assign the relay output to a special message in Diag. behavior
you must first configure Outputs/Relay x:y or /Alarm relay/Function = Diagnostics .
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