Technical File of the EWD-H-P2 Elevator Load Weighing Device [System Introduction]
XI'AN Excellent Electromechanical Co. Ltd
http://www.xaest.com
：
(029)88416613、85565714、85568478
Add.: 7D ， Block A, Olympic Building, 14th
Chang An North Road, Xi'an, Shaanxi,China

：710061
第
2
—
1
页
Type EWD-H-P2 Elevator Load Weighing Device introdtion manual V2.2
● 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
Moveable elevator car platform
8
Overall Size
Column of
Φ
24
×
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.
Technical File of the EWD-H-P2 Elevator Load Weighing Device [System Introduction]
XI'AN Excellent Electromechanical Co. Ltd
http://www.xaest.com
：
(029)88416613、85565714、85568478
Add.: 7D ， Block A, Olympic Building, 14th
Chang An North Road, Xi'an, Shaanxi,China

：710061
第
2
—
2
页
● Installing Method:
Traction rope head installation diagram
Note:The system connection
bracket requires the user to make it
according to the specifie situation.
●
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:
●
Attention : Output wire of this device must not be connected with external power
supply to avoid everlasting damage.
● Others:
Accessory: Inductive magnet [20
×
20
×
4mm
3
] 1 piece Fastening Nut: 2 sets
If there is any abnormality during adjustment or operation, contact our company
directly.
Function
Explanation
System Operating Power
Operating Power
AC/DC24V(
±
10%)/100mA
Rated load relay dynamic Close contact
Contact Capacity:
DC/AC 48V/500mA
Overloading relay dynamic close contact
Overloading relay dynamic open contact