Lutz-Jesco MEMDOS KMS LA, Руководство по эксплуатации

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Electrical installation
24
© Lutz-Jesco GmbH 2020 BA-10491-02-V01
Piston diaphragm dosing pump
MEMDOS KMS LB/LA
Operating instructions
9.2.2 Connection socket 2
9.2.2.1 Analogue input
The analogue input makes it possible to control the delivery capacity by
means of a 0/4 – 20 mA signal.
The delivery capacity is regulated via the stroke frequency.
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0/4 - 20 mA signal
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Tolerance ± 2 %
n
Working resistance: 500 ohms
Pin M12x1
(A-coded)
Assignments Connection Cable colour*
2 (+) 0/4 – 20 mA
3
2
White WH
3 Analogue (GND) Blue BU
Tab. 23: Analogue input
* Applies to cable colours from Lutz-Jesco GmbH. No liability is accepted
for cables from other manufacturers.
9.2.2.2 Analogue output
The dosing pump relays an analogue signal via the analogue output; its
current value behaves in proportion to the delivery capacity set. With 0 %
delivery capacity, 0 mA or 4 mA is registered. With 100 % delivery capac-
ity, the output signal amounts to 20 mA.
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0/4 – 20 mA signal
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Tolerance ± 2 %
Pin M12x1
(A-coded)
Assignments Connection Cable colour*
1 0/4 – 20 mA
4
1
Brown BN
4 Analogue (GND) Black BK
Tab. 24: Analogue output
* Applies to cable colours from Lutz-Jesco GmbH. No liability is accepted
for cables from other manufacturers.
9.2.3 Connection socket 3
9.2.3.1 Level input
The dosing pump can be connected with an external level contact (e.g. a
suction line with a level switch) via the level input. The contact is open
when not switched. 24 V DC are always applied to pin 3. If the float falls
with a falling level, a contact is switched and the pump comes to a stand-
still. The alarm relay is also switched and the level and alarm LEDs illumi-
nate.
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Closer NO
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I
max
(with 24 V) = 3 mA
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Switching level high > 15 V DC
Pin M12x1
(A-coded)
Assignments Connection Cable colour*
2 DIG IN 2
IN
24 V
White WH
3 24 V OUT Blue BU
Tab. 25: Level input
* Applies to cable colours from Lutz-Jesco GmbH. No liability is accepted
for cables from other manufacturers.
9.2.4 Connection socket 4
9.2.4.1 Alarm relay output
Faults of the dosing pump can be outputted via the alarm relay. An alarm
LED lights up as soon as a fault is registered. The LED begins to flash
once the fault has been remedied and the error can be cleared.
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potential-free
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With an ohmic resistive load: max. 230 V AC, 2.5 A / max. 30 V DC, 2.5
A
Possible faults:
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Level switch (empty notification)
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Stroke sensor
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Cable break
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Motor overload
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Damage to motor
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Drive defective
Pin M12x1
(B-coded)
Assignments Connection Cable colour*
1 Break (NC)
contact
1
2
4
Brown BN
2 Make (NO)
contact White WH
3 - Blue BU
4 Changeover
contact Black BK
Tab. 26: Alarm relay output
* Applies to cable colours from Lutz-Jesco GmbH. No liability is accepted
for cables from other manufacturers.