Data Sheet
72 Series -
Monitoring relays
Functions for 72.01 and 72.11
Contacts
NO output
contact
Supply
voltage
LED
OFF
ON
ON
ON
U = Supply voltage
B1 = Max level
electrode
B2 = Min level
electrode
B3 = Common
= Contact 11-14
Z1-Z2 = Link to select
emptying
(Type 72.11)
Open
Open
Open
(Timing in Progress)
Closed
11 - 14
11 - 14
11 - 14
11 - 12
11 - 12
11 - 12
11 - 12
11 - 14
Open
Closed
Function and Run-on time
Type 72.01 Type 72.11
FL = Level control by Filling, Long (7sec) run-on delay. F = Level control by Filling, Z1–Z2 open. Run-on time fixed at 1sec.
FS = Level control by Filling, Short (0.5sec) run-on delay. E = Level control by Emptying, Z1–Z2 linked. Run-on time fixed at 1sec.
ES = Level control by Emptying, Short (0.5sec) run-on delay.
EL = Level control by Emptying, Long (7sec) run-on delay.
Filling functions
Wiring diagram Examples with 3 electrodes
Wiring diagram Examples with 2 electrodes
Type 72.01
Filling Control – between Min.
and Max. levels.
Under normal operation the liquid
level can be expected to cycle
between the Minimum and the
Maximum electrodes, B2 and B1
(plus a degree of over and
under-shoot).
Switch On:
• On “power-up”, if the liquid is
below B1 the output relay will
operate after time T has expired.
• On the liquid level falling below
B2, the output relay will operate
after time T has expired.
Switch Off:
• On the liquid level reaching
electrode B1, the output relay will
de-energise after time T has
expired.
• On “power-off”, the output relay
will immediately de-energise.
Type 72.01
Filling Control – about a single
level, B1.
Under normal operation the liquid
evel can be expected to cycle about
the level set by electrode B1 with a
degree of over and under-shoot.
Switch On:
• On “power-up”, if the liquid is
below B1 the output relay will
operate after time T has expired.
• On the liquid level falling below
B1, the output relay will operate
after time T has expired.
Switch Off:
• On the liquid level reaching
electrode B1, the output relay will
de-energise after time T has expired.
• On “power-off”, the output relay
will immediately de-energise.
Type 72.11
Type 72.11
U = 24 V DC
24 V AC 50/60 Hz
(110...125)V AC 50/60 Hz
(230...240)V AC 50/60 Hz
U = 24 V DC
24 V AC 50/60 Hz
(110...125)V AC 50/60 Hz
(230...240)V AC 50/60 Hz
F = Filling
F = Filling
Level
Level
5
IX-2012, www.findernet.com