Rolling Shutter Motor Control


An electrically operated
rolling shutter usually has a standard control panel with a
three-position switch: up, down and stop. If you would like to automate
the opening and closing with a time controlled switch, a few additional
wires will have to be connected. Typically, the controls are implemented
as indicated in the schematic ‘Normal Situation’. If this is indeed the
case, then you can see in ‘New Situation’ how the shutter can be
automated with a timer. There is only one method to determine the actual
schematic of your control circuit, and that is to open the control box
and using an ohmmeter, pencil and paper to check out and draw the
circuit. Make sure you turn the power off first though! Connect a 230-V
relay (with both the contacts and the coil rated 230 VAC) to the timer.

Circuit

Circuit diagram

The changeover switch between automatic and manual control needs to be rated 230 VAC
as well and may not be a hazard for the user. The relay and switch are
preferably fitted in a plastic mains adapter enclosure with built-in
plug, which is plugged into the timer. It is a good idea to check first
if this will actually fit. Because of the manual/automatic-switch, the
operation is completely fail-safe and misunderstandings are out of the
question. The switch prevents the issue of conflicting commands (with
disastrous consequences) when, for example, the shutter is being
automatically raised and manually lowered at the same time.

Circuit

Circuit diagram


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