MJK Automation Shuttle Ultrasonic Level Transmitter and Sensor - Manual (Page 21)

21 SW 838023 GB Shuttle Manual 100316
Display and keyboard
Relay outputs
Selection of relays 1 and 2
Three functions are available:
- pump control with alternation of two pumps
- level control
- system alarm
Note:
If Pump Control is selected, the start and stop
settings cannot be set any closer than 10 cm.
If Level Control is selected, the start and stop set-
tings cannot be set any closer than 1 cm.
Select the desired function with the arrow keys.
Level control:
See page
23 .
System alarm:
See page
24 .
Note: If pump control is selected, both relays are set in this menu and relay 2 will not be
available for other functions.
The relays can control both pumping in and pumping out, but both relays will have
the same function. The function is selected automatically when relay 1 is set ac-
cording to the start and stop levels. If the start level is set higher than the stop level,
both relays will then be configured for pumping in. On the other hand, if the start
level is set lower than the stop level, both relays will be configured for pumping in.
If it is later desired to change the setting, simply change the setting for relay 1 after
which the start and stop setting for relay 2 will be switched automatically.
If the relays are configured for pump control, they will always be deactivated on
system errors after 30 seconds independent of the selected time delay to prevent
dry run of the pumps.
Pump control:
Continue on the facing page.