Lutz-Jesco MEMDOS SMART LK, Operating Instructions Manual

Page: 30 / 62

Electrical installation
Description of connection sockets
31
© Lutz-Jesco GmbH 2014
Subject to technical changes.
140725
BA-10103-02-V01
Stepper Motor-driven Diaphragm Dosing Pump MEMDOS SMART LK Operating instructions
9.2.1 Connection socket 1
9.2.1.1 Stroke feedback output
At the stroke feedback output, the dosing pump reports back each
executed stroke to the pulse input of another dosing pump. In this way, it
is possible to network several dosing pumps and to trigger synchronized
dosing strokes.
Fig. 29: Synchronization of several dosing pumps by means of stroke feedback and pulse
control

Optocoupler, max. 30 V DC, 5 mA

Assignment of pin 1, 2
9.2.1.2 Release input
Using the Release input, it is possible to start or stop the dosing pump
externally.

Potential-free contact

Programmable NC or NO contact

Assignment of pin 3, 4
Pin M12x1
(A-coded)
Assignments Connection Cable colour*
1 Optocoupler
collector (+)
1
2
Brown BN
2 Optocoupler
emitter (-) White WH
3 Ground (GND)
3
4
Blue BU
4 External On/Off Black BK
Tab. 22: Connection socket 1
* Applies to cable colours of cables from Lutz-Jesco GmbH. No liability is
accepted for cables from other manufacturers.
9.2.2 Connection socket 2
9.2.2.1 Pulse input
The pulse input makes it possible to control the delivery capacity by
means of pulses. The system regulates the delivery capacity by means of
the dosing pump's stroke frequency and number of strokes in depend-
ence on the number of pulses and the pulse spacing.

Provided potential-free contact

For potential-free NO contact, e.g. a contact-type water meter

5 V DC supply voltage (current across all connections limited to a total
maximum of 50 mA)

Pulse length min. 4 ms
For information on setting the Pulse input operating mode, see chapter
11.2.2 „Pulse input“ on page 42.
Pin M12x1
(A-coded)
Assignments Connection Cable colour*
1 Pulses
1
3
Brown BN
2 (+) 0/4 – 20 mA White WH
3 Ground (GND) Blue BU
4 - - - Black BK
Tab. 23: Connection socket 2
* Applies to cable colours of cables from Lutz-Jesco GmbH. No liability is
accepted for cables from other manufacturers.