Endress+Hauser Liquiline CM444 - Alarm Relay and Optional Relays

Operation Liquiline CM442/CM444/CM448
76 Endress+Hauser
10.4.2 Alarm relay and optional relays
The basic version of the device always has one alarm relay.
Additional relays are also available depending on the version of the device.
The following functions can be output via a relay
• Limit switch status
• Controller manipulated variable for controlling an actuator
• Diagnostics 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.
Outputting the status of a limit switch
Path: Menu/Setup/Outputs/Alarm relay or relay at channel no.
Function Options Info
Function Options
•Off
• LimitSwitch
• Controller
•Diagnostics
• Cleaning
Factory setting
Off
The following functions depend on the option selected.
These versions are illustrated individually in the
following section to provide a clearer understanding of
the options.
Function="Off" switches off the relay function and means
no further settings are required.
Function="LimitSwitch"
Function Options Info
Source of data Options
•None
• Limit switch 1
• Limit switch 2
• Limit switch 3
• Limit switch 4
• Limit switch 5
• Limit switch 6
• Limit switch 7
• Limit switch 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
"Setup/Additional functions/Limit switches" menu.