17
UK
12 Applications
12.1 Hydraulic vessel
Minimum level monitoring with prewarning and alarm
Switching output 1: prewarning
SP1
slightly above rP1 (to suppress wave movements)
rP1
below preset level → prewarning, start refilling
OU1
hysteresis function, normally closed (Hnc)
Switching output 2: alarm
SP2
min� value reached again → alarm reset
rP2
below min� value → alarm
OU2
hysteresis function, normally open (Hno)
XX�X = display value, A = prewarning, B = alarm
• If the level is below rP1, output 1 switches until liquid is refilled� If SP1 is
reached again, output 1 switches back�
• If the level is above SP2, output 2 switches� If the level falls below rP2 or if
there is a wire break, output 2 switches back�
• By setting SP1 the maximum level can be controlled/monitored: The value of
SP1 determines up to which level (max) is to be refilled� When the maximum
level is reached, this is signalled by the LED OUT1 going out and output 1
switching off�
