8 Atwell International Limited
The System
The system is contained within a robust plastic enclosure. Fail Safe Design, easy
site wiring especially with plug and socket options, where the sensors, brakes and
controller will be connected via a plug and socket arrangement to assist on site
wiring.
Power feed and lift panel connections will be the responsibility of the end customer.
Set of parts to be supplied in the full system include;
• Control Box (UMD-SRB02).
• Sensor Box (UMD-SP01).
• Sensor Mounting Bracket and fixings.
• Set of 3 interconnecting cables.
• Set of documentation (in English).
The Movement Detector (UMD-SP01)
The movement detector will be a fixed non-contact non-adjustable type.
The actual motion sensors are enclosed in a sealed enclosure to protect from
moisture, vibration and tampering. This is a non-serviceable component, any doubt
then it should be replaced by contacting Atwell International.
The movement detector is sprung mounted to a bracket. The bracket is directly
mounted to the rope brake assembly. Alignment and tension on the rope can be
adjusted during installation and to account for wear..
The Detector is constantly monitored, so if there is a fault with it or the connection
to it then an ALERT signal will be sent to the main lift panel. This is to request the lift
to stop at the next level, open the doors then render itself out of service. If the fault
is detected whilst the doors are open then the brakes will be deployed, because
this is the worst-case scenario and the system or safety gear must be fail safe.
The Controller (UMD-SRB02)
The controller will be enclosed in a Polycarbonate/ABS. IP40 rated enclosure
suitable for the lift control room. It is approximately 290mm long x 260mm tall x
120mm deep.
With the exception of replacing the battery every 3 years it does not require any
maintenance, other than periodical testing and inspection in accordance with your
site risk assessment and the lift regulations.
It contains a programmable safety device, visual display screen, battery power
supply and fuses.
With a simple modification to the door wiring connections now also complies with
the latest EN81-20:2020.
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