elevator parts low cost load cell
Type EWD-H-P2 Elevator Load Weighing Device
INTRODTION MANUAL
● This system is applicable to all elevators with movable car platform in need of overload signals. This device is of extremely high performance-price ratio. This appliance is to overcome the inherent disadvantage of the mechanical overload switch and to replace it.
● Main characters:
1. Working in a contactless and inductive way. No mechanical movement itself. Being directly installed in the original place of overload switch. No necessity of changing the mechanism of elevator car.
2. Adopting strong inductive magnet, improving the anti-interference of the system to the utmost.
3. The electrical property is in compliance with the standard of the International Electro-technical Commission (IEC).
4. Rated relay dynamic open, overload relay -dynamic close and output-break are easy for customers to use.
5. More accurately positioning, small overall size, easy installation and adjustment, simple structure and low price.
● Technical Specification:
⒈ | Application Range | Applicable to all elevators with movable car platform in need of overload signal with a inspection clearance of 8～15㎜. |
2 | Sensitivity | Overload turning point≤Rated load adjusting point±0.05㎜ Rated load→overload retention gap≈0.50mm |
3 | System Error | ≤1.5% (5～40℃) |
4 | Output Mode | 1 pair of relay dynamic CLOSE or dynamic OPEN contacts respectively with the capacity of DC/AC 48V/500mA. |
5 | Operation Ambient Temperature | -25～55℃ |
6 | Power Supply | AC/DC 24V(±10%)/15mA. The operating current of the whole machine≤100 mA. |
7 | Install Position | Movable elevator car platform |
8 | Overall Size | Column of Φ24×83 mm |
● Working Principle:
This system weighs the elevator car load based on the principle of the elastic deformation of movable elevator car platform caused by loading with the HALL sensor measuring the change of displacement, fulfilling the aim of load weighing.
● Installing Method:
● Adjustment
1. Please refer to the above figure to install this device with the connecting support (made by the customer himself) closing the middle part of the car platform as near as possible.
2. Let the magnet adhesive on the car platform with the marking-face right facing the induction point of the device.
3. Install and adjust this device so that the magnet on the car platform aiming at the center point of its upper face. Meanwhile, assure the end face of this device in parallel with that of the magnet.
4. When elevator is of rated load, adjust this device up and down to make the indicator just turn green, yellow one (red one +green one) turn down , at this time, fasten this device and the adjustment is finished.
5. At the time of overload, indicator of this device keeps yellow (green+red)
● The principle of system wiring:
Wire | Function | Explanation |
Red, black | System Operating Power | Operating Power AC/DC24V(±5%)/100mA |
Yellow, White | Overloading relay dynamic Close contact |
Contact Capacity: DC/AC 48V/500mA |
Blue, green | Overloading relay dynamic Open contact | |
Green, white | Overloading relay dynamic break contact |
Attention : Output wire of this device must not be connected with external power supply to avoid everlasting damage.
● Others:
Accessory: Inductive magnet [20×20×4mm3] 1 piece Fastening Nut: 2 sets
If there is any abnormality during adjustment or operation, contact our company directly.
● Attention: The inductive magnet is specially made of rare earth magnet with strong magnetism for this product. Take special care in the course of installation. Don’t let it close to the high temperature above 100℃ to avoid demagnetization and our company will not be responsible for the personal hurt and equipment damage arising from this.