Do you know how many control methods a high-speed roller shutter has? There are four. The common ones are: wired control box with linked control; wireless remote, usually 433MHz, with a handheld remote; and external system control, such as an automatic gate release system run by an embedded controller or computer that reads the plate number and opens automatically.
What are the control methods?
1. Transformer — Probably the simplest electrical part in an automatic door. High-end models add a fuse at the transformer output to protect the controller if the motor overloads, which makes the system safer.
2. Drive motor and overheat protection — High-end sliding automatic doors use brushless variable-speed motors. High power and adjustable. To keep open-close speed accurate, the drive motor has a speed encoder. The overheat protector is key to a longer controller life.
3. Lock — Locking is the base for door control and access. Sliding automatic doors have two lock types: ordinary ones use an electromagnetic lock, where the lock works through a toothed belt; heavy ones use an electromechanical lock on the door hanger. The point is to signal the controller when locked so the door does not restart from inside and damage the operator. To link with an access system, the controller must coordinate the open and unlock actions. High-end doors output the unlock signal 1/10 second before the open signal. This matters a lot for swing doors. If the level is not met and locked at the same time, faults are easy. So low-level automatic doors that need locking need a special circuit module.
4. Controller — The controller is the heart of the automatic door. Its growth tracks modern industrial automation and IC development, from analog circuits to microprocessors. Digital program control lifted modern automatic doors to a new level in every way.
High-speed roller shutter installation:
(1) Set the control box location inside the attendant room, the device that works the retractable door switch.
(2) Run 220V power to the bottom of the control box. Best to add a ground wire, gauge 1.37, with leakage protection, laid in PVC conduit.
(3) Reserve a 32mm PVC pipe from the bottom of the control box down below floor level, through the wall outward, to about 0.1 to 0.15 m below floor at the track, for the future outdoor lines to enter.
(4) From the table, get the opening length. When building the opening, the clear width inside is at least 0.75 to 0.8 m; the clear height for a normal door is at least door height + 0.25 m, for a deluxe door at least door height + 0.1 m. At the top inner end of the opening, leave a service hole 0.4 m wide and 0.6 m high. If possible, add 0.2 to 0.3 m to the total opening length so the service hole becomes a small door for later electric-line maintenance.
(5) Before laying track, leave about 0.8 to 0.9 m width and do the ground on both sides first. After 2 to 3 days (5 to 7 in winter), lay the track and have civil works do the track ground at the same time. During track laying, no traffic on the surface, or the track bends.
(6) Install the retractable door, connect the lines, and test the switch control box.