General Questions And Answers - Maco MULTI-MATIC Assembly Instructions Manual

General questions and answers

Is there a predetermined minimum pulse duration for the e-hardware to respond to the motor? Can this
be quantified?
As noted in the connection plan, the pulse duration is a minimum of 200 ms.
When clarifying the interface, the term edge control came up. What does that mean?
The control is carried out by a signal modification, but is then independent of the further course of the signal.
Example: The MACO drive is controlled by a short button push. The course of a movement (to the end
position, back to the middle) is not affected by the further pressing or non-pressing of the button.
The term edge control also applies if the signal (the push of a button) must last a certain amount of time in
order to be recognised as a change. Crucially, the further signal progression after detecting a change no
longer affects the control.
Is it possible to operate the e-hardware with a normal open/close button?
Yes, there are two possibilities. In the first, the button is mechanically locked, so that both buttons cannot be
operated at the same time. The second operation is described in the next point.
For a presentation, I'm using a commercial 2-way single button, in which both
buttons can be pushed at the same time. Is there a danger here for the drive or the
mains power supply? Do I have to stick to the defined resistance of 1 Kilo-ohm for the
switching in this case?
Yes, here you must stick to the resistance according to the circuit diagram, to protect the
Single button
drive and power supply from a short circuit.
To act against the residual ripple (alternating voltage on the secondary side of the power supply), the
earth is connected to the -24 V output of the power supply, as per the connection diagram. Where does
this residual ripple come from?
See universal circuit diagram!
Cheap switching power supplies have a capacitive connection between the primary and secondary side for
self-suppression of the high frequencies. The high frequencies would otherwise cause radio-wave disruptions
(for information – expensive devices do not require this connection for suppression). However, this capacitive
connection now has the effect that on the secondary side against earth/PE an alternating voltage can be
measured, which can also be very high, even up to 230 V. However, it is not dangerous because the source is
very high-impedance, which means that it can only supply very little electricity, only a few microamps. That's
why it's noticeable, but not harmful.
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