SD-BOX INSTRUCTION MANUAL, CODE: DYN 81.01.00
Date: 03/03/2020
Version 00
- 3 -
1. INTRODUCTION
1.1.
DESCRIPTION
This equipment is to detect any type of unintended movement of the car (UCM) with the doors open.
If there is unintended movement, it opens the safety line output connected to the safety chain and
locks the overspeed governor by deenergizing the associated rotation coil and engaging the safety
gear. This corresponds to the following device in table A.1 in the standard EN 81-20: 2017.
•
“Detection of unintended car movement with open doors”, with a minimum SIL of 2.
This device must be used in combination with an overspeed governor equipped with a governor
rotation locking coil. When energised, the coil allows the governor to turn and locks it when it is de-
energised. The coil must be designed to be powered continuously (100% duty cycle) at 24 V
DC
and
consume a current of 150-800 mA while energised.
This system compares the car door status with the unlocking zone at all times. If it detects that the
car has left the unlocking zone with open doors, it locks the overspeed governor.
Facing the appearance of an UCM, a competent technician is needed to make the installation
operational again. Once the problem causing the UCM is resolved, the "RESET" button on the SD-
BOX is pressed to re-establish the safety line and make the system operational again.
No intervention of the lift control is
needed to make the overspeed
governor coil act, as the system
described acts directly on it.
If a fault occurs in this contact or in the
coil that may pose a risk, a system
failure signal is activated to inform the
controller. When this signal is received
it prevents the lift from starting the
following travel.
If batteries are used as an auxiliary
power supply, an external charger
between the batteries and the SD-BOX must not be connected under any circumstances. The SD-
BOX is capable of charging the batteries itself.
Important
note
Do not connect a charger between the batteries and SD-BOX, it may
burn. For further details on how to connect the SD-BOX to your control
panel, please refer to “
” in this manual.
Note: This manual displays partial information on the instructions for use and maintenance of this product. Please refer to the customer
area in Dynatech’s website in order to consult the full manual; http://customers.dynatech-elevation.com/
Summary of Contents for SD-BOX
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