Indupart rapid action doors
Indupart supply a three phase controller with their rapid action Italian made doors. Today I attended a job where a recurrent problem needed solution; and, a simple thing had to be done just to make the door move to the floor. The door was able to move up okay, but could not move down more than about a meter.
See the image of the upright panel here, with 4 wires. This is a hard wired receiver for the safety edge.
A rapid action door like this usually has a PEC across the span at low level, and an 8.2k ohm resistive safety edge along the bottom, weighted with a bar to pull the door down fluently.
The panel with the 4 wires communicates with the safety edge. It is continuously running on 7.5volts, and does not lose its memory.
Problem is, the other part, shown next, horizontally framed - is run on 2no. 1.5v batteries. The batteries don't have much life because the door is on the move most of the day. And, rather appallingly, this slave device on the bottom edge, loses its connection with the receiver when the batteries go flat / voltage drops.
Hence, battery life of about 2 months, and then complete failure of hte door to close, even after batteries have been replaced.
Mate or pair the slave to the master
To pair them again, after changing the batteries - do this.
Press the microswitch on the inside of the receiver, cycle until there are two leds ON. Then hold 5 seconds. The receiver is now in programming mode.
Now, go to the slave device (you may need a ladder since the door is stuck on open!), and press the microswitch in there. The master / receiver will beep in acknowledgement.
Now, go back to the receiver, and if the two leds are still on, then cycle them off.
(The door won't move at all if the receiver is in programming mode, that is, if the LEDs are still on.)
Logic box, IPR
To replace the safety edge batteries, and pair the master and slave, it should not be necessary to open the control box, shown here.
It's my view that these doors, while working well, do need a larger battery, something with 3 or 4 times the Amp Hour value. I have proposed putting such a larger battery pack onto the door for the customer, on Wrexham Industrial Estate.
They could also be hard wired, so that a helical coiled cable (PUR outer, 0.14mm conductive area, 3 core) could be run from the logic box, to the slave. Obviously, it would need no more than 3 volts, so a 12v / 24vdc source would need a voltage regulator unit, with capacitors, etc., on a little bit of vero board, to be added to the collection of assorted wires and bits which you may find on the photo.