Features and Functions Description

1 Overload Protection

If the elevator is overloaded, the system will hold the door in open condition and buzzer will be triggered to notify the passengers.

2 Slip / Roll Back Protection

If the system detects the feedback of running direction is opposite from the command direction, it will stop the elevator and stay in idle for further reset after inspection.

3 Car Sliding Protection

If the system detects the feedback pulses coming in while car is in stop status, the system will judge it as car sliding fault, and it will stop the entire operation and stay in idle for further inspection and reset manually.

4 Power Resume Self Rescue

During automatic drive, when normal power failure and then resumes, if the elevator stops at door zone, it will travel to nearest floor and then open the door for releasing passengers, if the elevator stops at non door zone, it will return to ground floor to reset for the sake of safety, and then open door automatically

5 Next Floor Attempt

If the elevator encounters abnormal operation such as door open failure, elevator stops in between floors, the system will move the elevator to nearest floor after completing the self diagnostic checking

6 Safe Landing

If the elevator stops in between floors due to malfunction, the system will move the elevator to nearest floor after completing the self diagnostic checking.

7 Lobby Floor Standby

During Auto mode, if the elevator has idled for a preset period, the system will deploy the elevator to a preset homing floor for standby purpose; this minimizes the waiting time for passengers boarding from the lobby floor

8 Service Floor and Door Opening Setup

The service floors can be setup easily through the system operator either with front door or/and rear door opening enable

9 Watch Dog Protection

Electronic PCB control boards are equipped with watch dog protection function, when a program fault is detected, it will force all output ports to low state, and reset the processor.

10 Duplex Control

Two elevators are communicating with each other via a CANBus in order to respond to the hall call registration in phase_ When a hall call is registered the system will allocate this registered call to the elevator that is relatively near to the floor on which the call is registered, so that the waiting time can be reduced

Step Chains Contacts

Located in the lower step reversing compartment, these contacts monitor the step chains for elongation, breakage or shortening of one or both of the step chains. When actuated, the monitoring contacts will disable and stop the escalator from further movement.

Comb Plate Contacts

If a foreign object is caught between the comb plates, and the steps, the resulting pressing action will move one of the comb plates backwards and actuate the safety contact, thereby switching of the escalator.

Handrail Entry Contacts

The handrail entry points are located far beneath the head of the balustrade. The handrail entry contacts are so positioned that if there is any danger of an object becoming wedged in the handrail entry points, a contact will actuate and switch off the escalator.

Emergency Stop Buttons

Emergency stop buttons have been built into the balustrade skirtings at the upper and lower ends of the escalator. As the name of the button so implies, the emergency stop buttons may be used to switch off the escalator manually, during emergencies or even during normal conditions.

Phase Failure Relay

This relay is a safety feature, which monitors the main power supply and disables the escalator in the event of phase failure or phase reversal.

Step Gap Lighting

Special green lamps in the form of flourescent tubes, mounted on both the top and bottom of the escalator, make the individual steps clearly discernible and distinguishable, especially at the horizontal runs. Boarding the escalator is there for much easier for the young, elderly and inexperienced persons.

Skirting Contacts

These contacts have been installed at both the top and bottom of the escalator at the transition curve. If an object gets caught between the step and the skirting panel, the resultant pressure on the skirting panel will actuate one of these contacts, thereby disabling and switching off the Escalator .

Drive Chain Contact

This contact monitors the Drive Chain for breakage. When actuated, the contact will stop the escalator.

Motor Overload& Overheat Relay

This relay monitors the motor working condition. In case of motor overload or overheated, the escalator should be stopped.

Speed Monitor with Anti reverse Function

Fixed at the bottom of brake, it is to monitor the speed of flywheel as well as to avoid reverse and will stop escalator in case rated speed is over 120% or under 80%

Step Sag Contacts

Fixed at the start sections of both inclined upper and lower transition curves, it will be actuated to stop escalator in case step (including step roller) sags more than 3mm.

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