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参数资料
| 型号： | DLA71DB482P |
| 厂商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Monitoring Relays Pump alternating |
| 中文描述： | 监控继电器泵交替 |
| 文件页数： | 2/4页 |
| 文件大小： | 128K |
| 代理商： | DLA71DB482P |
2
Specifications are subject to change without notice (01.09.06)
Mode of Operation
DLA71 is made for pumping
systems where 2 or 3 pumps
are in parallel. It lets the
pumps work alternatively,
allowing more
work togheter in case of
need.
pumps to
Example 1
(emptying a basin, 2-pump
system)
As soon as the liquid reach-
es switch S1 one pump
starts. As 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
stopped by the two pairs of
switches S1, S2 and S3, S4.
Appropriate
allows the pumps to work
together in case of need.
and
positioning
Note
(2-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.
This rotation is repeated
every 6 hours of single and
continuative
pump.
work
of
a
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-
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.
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
hours, the one running for
more time stops and the free
one starts.
This rotation is repeated
every 6 hours of continuative
work of a pump or a couple
of pumps.
for
6
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
Indication for
Power supply ON
One Pump ON
Two Pumps ON
Three Pumps ON(DLA71...3P) as above, flashing 3 Hz
LED, green, steady
as above, flashing 1 Hz
as above, flashing 2 Hz
Note: if more than one pump
is active, the indication refers
to the pump started last.
(EN 60529)
IP 20
3
-20 to 60°C, R.H. < 95%
-30 to 80°C, R.H. < 95%
Environment
Degree of protection
Pollution degree
Operating temperature
Storage temperature
Housing
Dimensions
Material
Weight
Screw terminals
Tightening torque
35.5 x 81 x 67.2 mm
PA 66
Approx. 135 g
Max. 0.5 Nm
acc. to IEC 60947
UL, CSA
Yes
Electromagnetic Compatibillity
According to EN 61000-6-2
According to EN 61000-6-3
Approvals
CE Marking
EMC
Immunity
Emission
General Specifications
Power supply
Rated operational voltage
through terminals:
A1, A2 or A3, A2
Overvoltage cat. III
(IEC 60664, IEC 60038)
B48:
24/48 VAC ± 15%
45 to 65 Hz, insulated
115/230 VAC ± 15%
45 to 65 Hz, insulated
B23:
Dielectric voltage
Supply to input
Supply to output
Input to output
Rated operational power
AC
4 kV (1.2/50 μs)
4 kV (1.2/50 μs)
4 kV (1.2/50 μs)
3 VA
Supply Specifications
Reaction time
Closing input
Opening input
< 100 ms
< 100 ms
Minimum delay to activate
the rescue pumps
Continous working time to
activate the rotation pumps
10 s
6 h ± 10%
General Specifications
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