The fire-rated shutter control box controls up, down, and stop, with double-click auto-scroll. On smoke or heat sensor signals, program modes A, B, or C run one descent, mid-hold, and second descent. On a fire center signal, it auto-runs one descent, mid-hold, and second descent. In alarm, after the door reaches bottom, any of up/down/stop makes it rise. It outputs door-position signals (mid, upper, lower).
Notes for the control box:
1. For safety, the controller must be grounded.
2. Before the limit switch is set, with no one watching, the box must not be powered.
3. After the box runs for real, do a run check each month.
4. If a key command gets no action, first check for a missing phase, wrong phase order on the three-phase input, and if the stop key is on a normal-open contact.
Wiring:
1. A fire-rated shutter is mainly the curtain and the electric system. The electric system includes the control box, fuse, and fire motor. The curtain uses inorganic fire cloth, aluminum silicate fiber blanket, radiation shield cloth, and decorative cloth sewn with high-temp thread, clamped by galvanized steel strips on both sides for wind strength. The bottom box plate is galvanized steel, 0.8 mm, seamless. Seamless steel tube, derusted and anti-corroded outside. Rails are galvanized steel, 1.2 mm, made as split composites.
2. First read the terminal diagram to know each terminal’s role and wiring rule, then wire right. After confirming, use a 500V megger to test insulation. Power terminals to motor terminals to housing and between them must be at least 300 MΩ. Only if insulation passes may you power on for debug.
3. Power on and see if the “normal” light is on. If not (no control power), swap any two of the three input phases. Manually control up, down, stop, and set the travel switch. With no fire, press “up” and the shutter should descend; press “stop” and it should halt. On test, up/down may be reversed; just swap any two of the three motor wires. Then test if the limit for the run direction works (touch the micro switch by hand); if not, swap the limit wiring. Then set the travel switch so the shutter opens and closes in place.