Monitoring Relays Product Description
•Pump alternating relay for 2 or 3 pumps •Output: 2 x 5 A SPST relay or 3 x 5 A SPST •For mounting on DIN-rail in accordance with DIN/EN 50 022
•35.5 mm DIN-rail housing
•LED indication for relay and power supply ON •Galvanically separated power supply
•Built-in delay for the second or third pump in case of simultaneous activation is required
•Built-in function for automatic rotation of the pumps
Pump alternating Type DLA71
DLA 71 is relay made to alternate 2 or 3 pumps in a multiple pump system. In case of need (i.e.: overflow)the second, or even the third pump can be activated together with the first one.In case more than one pump is required to start at the same time, the pumps start 10 s after the previous to
avoid big inrush current.The LED indicates the state of the alarm and the output relay.
35.5 mm wide housing suit-able both for back and front panel mounting.
Type Selection
Mounting Output Function Supply: 24/48 VAC Supply: 115/230 VAC DIN-rail 2 x SPST For two pumps DLA 71 D B48 2P DLA 71 D B23 2P DIN-rail
3 x SPST
For three pumps
DLA 71 T B48 3P
DLA 71 T B23 3P
Mode of Operation DLA71 is made for pumping systems where2or 3 pumps are in parallel. It lets the pumps work alternatively, allowing more pumps to work togheter in case of need.
Example 1
(emptying a basin, 2-pump system)
As soon as the liquid reach-es switch S1 one pump starts.
s soon as S1 switches back the pump stops. When switch S1 is activated again the other pump starts allowing uni-form wear and tear of all the pumps. If switch S2 is acti-vated both pumps start (2 pumps running at the same time). When S2 switches back the pump running since most time stops.Example 2
(emptying a basin, 2-pump system, differential mode)
In this case the pumps are separately started and
stopped by the two pairs of switches S1, S2 and S3, S4. Appropriate positioning allows the pumps to work together in case of need. Note(2-pump system)
改性沥青生产设备If the system is continuously working with only one pump, after working for 6 hours, DLA71 stops the pump and the second one automatical-ly starts. This rotation is repeated every 6 hours of single and continuative work of a pump.
Example 3
(emptying a basin, 3-pump system, normal mode)
The system works exactly as described in example 1 except that if switch S3 is reached three pumps work
at the same time. When they
switch back the pumps are
turned off in sequence start-
ing from the one running
longer.
Example 4
(emptying a basin, 3-pump
system, full mode)
As soon as the liquid reach-三羟甲基丙烷三丙烯酸酯
es switch S1 one pump
starts. When it drops below
switch S4 it stops. If switch
S1 is triggered again another
pump starts. If switch S2 is
activated a second pump
starts (rescue function). If
switch S3 is activated all the
pumps operate. The only
switch to stop all the pumps
active at a certain time is S4.室内wifi定位
Note(3-pump system)
If the system is continuously
working with only one pump,
after working for 6 hours,
DLA71 stops the pump and
the second one automatical-
ly starts. If also the second
pump works continuously
alone for 6 hours, it is
stopped and the third pump
is then started.
If a couple of pumps is con-
tinuously working for 6
hours, the one running for
more time stops and the free
one starts.
This rotation is repeated
带通滤波器设计every 6 hours of continuative
work of a pump or a couple
of pumps.
Note (2 and 3-pump sys-
tems)
In case the task is to fill a
basin, all the switches are
reversed in the basin itself.
DLA71
General Specifications Supply Specifications
General Specifications
DLA71
Wiring Diagrams
三维
激光扫描技术
Operation Diagrams
DLA71
Operation Diagrams
Dimensions
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