ATWELL UMD-SRB02 User manual

www.atwellinternational.com
UMD-SRB02 Control BoxUMD-SRB02 Control Box
Uncontrolled Movement DetectorUncontrolled Movement Detector
Installation ManualInstallation Manual
Version 1.0Version 1.0

2Atwell International Limited

3UMD-SRB02 Version 1
Contents Overview....................................................................................................................4
Safety Notes...............................................................................................................5
Owners Obligations ...................................................................................................6
Specification ..............................................................................................................7
Operation.......................................................................................................7
The System....................................................................................................8
The Movement Detector (UMD-SP01)..........................................................8
The Controller (UMD-SRB02).........................................................................8
Signals............................................................................................................9
Handling, Transport & Storage ...............................................................................10
Components Supplied.............................................................................................10
Installation................................................................................................................11
General Advice ...........................................................................................11
The Control Box (UMD-SRB02)....................................................................11
Wiring .....................................................................................................................12
Mechanical Installation ...........................................................................................18
Normal Operation....................................................................................................19
Resetting the System ..................................................................................19
Bypassing the System.................................................................................20
Test Deployment of Brakes.........................................................................21
Uncontrolled Movement Settings...........................................................................22
Site Testing of Uncontrolled Movement .................................................................22
Instructions for Rescue Operations........................................................................23
Regular Maintenance ..............................................................................................24
Maintenance Instructions .......................................................................................25
Controller.....................................................................................................25
Movement Detector Assembly...................................................................25
Operational Checks.....................................................................................25
Spare Parts...............................................................................................................26
General Information ................................................................................................26
Definitions................................................................................................................27
Very Important.........................................................................................................28

4Atwell International Limited
The movement detection control panel is designed to be installed with new lifts
and retrofitted to existing passenger and goods lifts and used in conjunction with
the bi-directional VG rope brake (VGRB2) and VG safety gears.
It has been designed and constructed to comply with all current UKCA and CE
requirements, i.e. EMC, Low Voltage, RoHS, WEEE and more specifically to meet the
requirements of EN 81-20:2020 (5.6. Precautions against freefall, excessive speed,
unintended car movement and creeping of the car).
The movement detection controls connect to the main lift control panel. From
here it can receive power and signals to tell if the lift doors are open, or that the lift
over speed governor is operating correctly. It also sends signals to the lift to stop
the lift at the next floor when a fault is detected.
The system will always deploy the brakes or safety gear immediately and interrupt
the main lift safety circuit if over-speed is signalled.
The movement detector monitors movement by looking at an idler wheel resting
on one of the main ropes. As the rope moves so does the idler wheel, and as the
idler wheel rotates the movement and direction of movement is detected.
When the doors are open the system is checking for excessive movement. If
excessive movement is detected then the brakes or safety gear, under its control
will be deployed and in addition to this, an emergency stop signal will be sent to
the main lift control panel, by means of interrupting the main safety circuit.
There are other functions included within the system such as an indication of
status to assist fault finding, resetting of the brakes, manual override to test the
deployment of the brakes, ability to bypass the system (allowing car top control,
without deploying the rope brakes) and pit safety to monitor car movement when
engineers are in the lift shaft or pit.
Power loss is catered for by the incorporation of an internal battery backup system
to seamlessly switch from mains power to battery and back again without the
need for manual intervention to reset the brakes or safety gear. But if during the
power loss excessive movement occurs, or the overspeed governor trips, the
brakes or safety gear will be deployed and a full reset will be required.
If during its normal operation, the system develops a fault then an error or alert
signal will be sent requesting the lift stops at the next floor, doors opened, and
stays there until the fault is corrected. During this time whilst the doors are open
the system will continue to monitor excessive movement.
Overview

5UMD-SRB02 Version 1
Both employers and employees have a duty of care in relation to the health and
safety of people or property which may be affected by their actions, or failure to
act. Therefore, building owners or those who have responsibility for controlling
buildings are required under the Management of Health and Safety at Work
Regulations to ensure that their premises are safe and free from risk to health so
far as is practicable. This includes access to the plant equipment and articles or
substances used and in this particular respect will be relevant to the Workplace
(Health, Safety, and Welfare) Regulations.
Installation, commissioning, and maintenance of this system should only be carried
out by authorised persons who have received the necessary instruction because it
is dangerous for any other persons to attempt to do so.
Any failure to take adequate precautions may render the authorised person guilty
of negligence should an accident occur.
It is essential that a “Competent Person” has installed and commissioned this
system. It is also essential that a “Competent Person” maintain this system in a
safe manner and at regular intervals as described in this manual.
The “Competent Person” must have had adequate training in theory and practice
together with experience of the equipment in question; to enable a true assessment
of its condition for continued safe operation.
No alterations, modifications or repairs to this system or its components should be
undertaken without the written consent and advice or instruction of the supplier
Atwell International. Any advice or instructions from the supplier must be followed;
any deviation may risk the safe operation of the lift. Even if consent is given then all
the risks associated with the work will have to be suitably and sufficiently assessed
by the owner before these alterations are implemented.
No replacement parts other than those specified or supplied by the supplier Atwell
International should be used as incompatible parts may risk the safe operation
of the lift. Genuine spares are available within 24 hours at a reasonable cost. But
if spares are needed quicker then the exact same or equivalent parts may be
sourced locally once the exact specification of those parts has been obtained and
you have suitably assessed the implications of using non-standard parts. If there
is any doubt then you should render the lift out of service and contact Atwell
International or one of its appointed agents for assistance.
Safety Notes

6Atwell International Limited
The Owner of the Lift or any delegated party shall inform the Maintenance
Company immediately:
a) about any detected abnormal functioning of the installation;
b) before any modification work on the installation;
c) about any modification of any equipment or condition related to the
installation which existed at the time of the original installation;
In the case of suspected or actual dangerous situations, the installation
shall be put out of service immediately.
We strongly advise that you should carry out a Risk Assessment to determine, as
completely as possible, the different intervention procedures of the maintenance
operations and to associate appropriate safety measures with each of these
procedures.
This Warning Label is incorporated into the control box lid graphic to warn you of
Live Electrical Parts, DO NOT REMOVE the lid if you are not a competent electrician
capable of safely assessing the potentially dangerous internal connections.
Owners Obligations
Danger
Isolate main
Isolate main
supply
supply
before opening
before opening

7UMD-SRB02 Version 1
Operation
A sensor is fitted to an idler wheel or tension weight pulley or safety gear sensor
acting on a wire rope attached to the lift car. The sensor will detect movement in
either direction.
A controller box will be fitted nearby and connected to the sensor, main lift control
panel, over-speed governor & VG rope brakes or VG safety gear.
Once the system has been installed and set up, the rope brakes or safety gear
must be set.
The controller will receive an external signal to say that the lift doors are open,
which will activate the system to “Monitor for movement”.
If movement is detected above the predetermined limit of 100mm to 900mm,
(actual pre set limit is 150mm but can be modified to suit customer requirements)
the controller will actuate a safety relay causing all safety systems to be deployed.
Once deployed, the controller will deliberately not allow the lift to run or revert to a
normal state until the rope brakes or safety gear have been manually reset.
If no movement was detected and the controller receives a signal to say the doors
are closed it will deactivate and allow the normal operation of the lift and primary
safety circuit.
During its operation, the control box will also continue to monitor the integrity of
the connection to the sensor assembly. It will also monitor the status of the rope
brakes or safety gear.
It will perform a simple self-diagnostic test to ensure all sensors are working, if a
fault develops a fault signal will be sent to the main lift control panel to request it to
bring the lift to halt at the next floor and open the doors (Please note the controller
can only send the signal and not control stopping of the lift). When the lift doors
open the rope brakes or safety gear will be deployed.
If during the monitoring phase, the connection to the sensor is lost, the rope brakes
or safety gear will be deployed.
Due to the battery backup, if mains power fails with the doors open, the system
will continue to operate and safely monitor for movement. If mains power fails
when the doors are closed the system will automatically monitor for movement
but will allow greater movement before applying the brakes.
The system is directly connected to the lift over-speed governor. So if over speed is
signalled the rope brakes or safety gear will be deployed immediately.
Maintenance, other than checking the cleanliness of the idler pulley assembly, is not
required for the actual components of the system, but it is strongly recommended
that the operation is regularly checked and tested by competent persons (lift
engineers) to comply with the regulations.
Specification

8Atwell 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.

9UMD-SRB02 Version 1
Indication of the system status will be provided by messages displayed in the
controller window
In addition to this a small visual display shows a text interface explaining the status
and warnings.
Signals
Controller input power supply will be 230V or 110V AC 50/60Hz, it has an internal
12v DC control voltage, power supply and battery backup.
The system requires the following signals and connections to the external contacts
to enable it to operate.
1. A car Door Open / Closed Input signal.
2. A landing Door Open / Closed Input signal.
These inputs should be a connected to a Dry / volt free, normally open, pair of relay
contacts wired parallel. It only requires a maximum switching current of 0.25A 12V
DC.
3. An over speed OK signal, normally closed when no over speed, opens when
lift is over speeding.
Please note if the lift loses mains power the above door signals will open, therefore
the third signal we need must be connected directly to the over speed governor
switch, as if this signal opens the brakes will be immediately deployed.
Output signals from the controller will be volt free relay contacts. The contacts are
rated for up to 2 Amp Max at 250VAC. These are:-
4. Main Lift Safety Circuit Output Signal.
5. Main Lift Alert Output Signal
If replacing the safety circuit fuse it must be a slow blow 2 Amp fuse (Part No. little
fuse 0215002 MXEP)

10 Atwell International Limited
The components of this system have been carefully packaged for shipping,
including strapping and strong tape. If you use a knife to cut open the boxes,
please be very careful to ensure that you only cut through the tape and straps and
not through the cardboard potentially damaging the components inside.
Please inspect the components of this system thoroughly prior to attempting to
install it. If the brakes, cables, controller or sensor has been or suspected to have
been damaged or exposed to moisture, they should not be used. Please return
them to Atwell International for examination and re-test.
The brakes, control boxes or sensors should never be lifted or carried by their
cables. They should never be allowed to get wet or exposed to moisture.
WARNING: the lid should never be hung by the ribbon cable!!
Handling, Transport &
Storage
Please check that the following parts have been supplied and received in good
order prior to attempting to install the system.
• Movement Detector (UMD-SP01).
• Movement Detector Bracket and fasteners.
• Control box (VG UMD-SRB02).
• Spare fuses. (2 types 2 of each).
• Green Mating Plugs.
• Manual & Documentation pack.
• 3 Prewired cables for simplified installation.
• 1 x Power lead.
Components Supplied

11UMD-SRB02 Version 1
General Advice
The area for which this unit is intended should comply with the lift room regulations
so that its installation, operation and maintenance is carried out in a risk free
environment.
Specific hazards arise for inadequate lighting, untidy work area, trip hazards and
poor access.
The Control Box (UMD-SRB02)
It is recommended that the Control box is ideally mounted at approximately 1.5
metres high on to a solid wall adjacent to the main lift control panel and close to
the rope brake and monitoring pulley position. Consideration should be given to
access for operation and maintenance of the control box as well as ease of cable
runs.
Installation

12 Atwell International Limited
Once the control box is in place, cable runs can commence. See Drg. page 16
CONNECTION OVERVIEW DIAGRAM for help to plan the cable runs.
There are Plug and Socket connectors supplied, cable support precautions should
be used to to prevent strain and damage to the individual cores.
We would strongly suggest that the power is fed from the main lift panel protected
by a circuit breaker Type D rated at 3 Amps. This must be a permanent supply and
not routinely isolated or disconnected as the battery back up in the UMD will be
operated beyond its intended use. The back up is designed for very infrequent
and intermittent use. The brakes are designed to be permanently energised and
only deployed in the event of an emergency or routine monthly inspection. Any
installed cables and connections must also comply with local regulations.
The battery backup will maintain the brakes whilst the lift is stopping, and for a
short period of 10 - 20 minutes. After this time the brakes will be deployed and the
system will require a full reset once mains power has been restored.
The external plug connections are fitted so as to prevent the need for access
inside of the control box.
During wiring great care must be taken to ensure that there is no risk of short
circuits from stray strands, cross connection, loose terminals or strain on cable
joins. All terminations should be made using boot lace ferrules or similar and each
wire appropriately identified with its corresponding wire number at each end of
the cable. Wiring of power and internal main lift connections must be carried out
by a competent electrician, and checked prior to applying power.
Wiring
230V
Danger
Isolate main
Isolate main
supply
supply
before opening
before opening

13UMD-SRB02 Version 1
Wiring (continued)
Note: Fuses are all now fitted at the factory prior to dispatch. The control box is
shipped with one battery lead disconnected. This needs to be connected before
the system is put into service.
Fitting of fuses & battery connection
SAFETY NOTE: Once connected to the main lift control panel there will be
potentially live connections within the VG UMD-SRB02 enclosure and the terminal
housing even when the fuses for the enclosure have been withdrawn.

14 Atwell International Limited
Make sure power is disconnected prior to attempting to check or replace fuses. As
there are live terminals connected through to the end of the fuse so if you touch
the fuse it could be Live!
Please check rating against labels of each fuse.
F1 = Internal Power Supply 500mA if 240v supply 800maA for 110v Supply
F2 = Control voltage 2.0Amps (12V DC)
The Fuses we use are Manufactured by SIBA and they are:
5mm diameter x 20mm long glass fuses
Connections to the Main Lift Control Panel must be carried out carefully to ensure
that the correct function of the signals is produced.
The control box input signals are 12V DC 100 mA they require a dry / volt free relay
contact normally open and energised when the Car and Landing doors are closed.
In addition, a connection directly to the normally closed (when not in over speed
condition) over speed governor switch is required.
The operation of these switches is essential to enable the VG UMD-SRB02 to
operate safely, i.e. If a cable is broken or the lift over speeds the UMD-SRB02 will
be FAIL SAFE. i.e. any problems, the rope brakes or safety gear will be deployed.
The connection from the Main Lift Panel such as Alert signal and emergency
stop must be 230 Volts maximum and must not exceed 2 amps. The control box
provides dry / volt free relay contacts for your signals.
On page 16 / 17 there is a list of all the electrical connections to the multipole plug
and their functions.
Wiring (continued)

15UMD-SRB02 Version 1
DO NOT TAMPER WITH THE CONTROL BOX
If it does not allow the brakes to reset then
there is still a problem with the lift!
Rectify the problem and the controller will allow a reset.
SAFETY NOTE:
Do not leave the lift to run in “engineer mode”, this is purely a function to allow you
to carry out maintenance on the lift without triggering uncontrolled movement.
You will have circumvented the part of the safety circuit.
Wiring (continued)

16 Atwell International Limited
Wiring (continued)
L
N
Connection is vai the supplied plug in IEC Lead, reccomendations is to use a local switched fused spur.
PE
COM Used By Atwell for external reset
N/0 Used By Atwell For future upgraded models - No connection required
+V Used By Atwell for external load monitoring
S1 For future upgraded models - No connection required
S2 For future upgraded models - No connection required
RED
BLACK
BLUE
GREEN
BROWN
YELLOW
WHITE
V OUT
Motor Connection, The UMD needs a Volt Free / Dry contact
V IN
that opens when the motor is off, the contact should close when the motor is running.
V OUT
Landing & Car Door Contact, The UMD needs a Volt Free / Dry contact
V IN
that opens when the car door is open, the contact should close when the doors are closed.
ES1
External Emergency Stop, The UMD needs a Volt Free / Dry contact
ES2
that opens when the brakes needs to be deployed the contact should be linked across if not required
EXT1
External Overspeed Govenor, The UMD needs a Volt Free / Dry contact
EXT2
that opens when the brakes needs to be deployed the contact should be linked across if not required
RED
BLUE
YELLOW
GREEN
RED
BLUE
YELLOW
GREEN
COM
Main Lift Safety Circuit, It should be wired in series with all other limit switches
N/0 The UMD provides a Volt Free / Dry contact, it will open when the brakes are deployed or lift is at electrical tripping speed.
COM
Alert /Warning signal, a request to stop the lift at the next floor and take the lift out of service as a fault has been detected.
N/0 The UMD provides a Volt Free / Dry contact, it will open when there is a fault detected and closes whel all is OK.
Main Fuse
500mA
ALERT
SC
BRAKE B
BRAKE A
EXT
ESTOP
DOOR
MOTOR
ENCODER
LOAD
CELLS
RELAY
Circuit Breaker / Fuse Lift Panel Isolator Switch
SENSOR PACK
Fitted to ROPE BRAKE
or IDLER PULLEY
or OVER SPEED GOVENOR
Connect cable braid to the Black wire or any Ground connection
Cable
Cable
Rope Brake A
Connect cable braid to the Green wire or any Ground connection
Cable
Rope Brake B
Connect cable braid to the Green wire or any Ground connection

17UMD-SRB02 Version 1
L
N Connection is vai the supplied plug in IEC Lead, reccomendations is to use a local switched fused spur.
PE
COM Used By Atwell for external reset
N/0 Used By Atwell For future upgraded models - No connection required
+V Used By Atwell for external load monitoring
S1 For future upgraded models - No connection required
S2 For future upgraded models - No connection required
RED
BLACK
BLUE
GREEN
BROWN
YELLOW
WHITE
V OUT Motor Connection, The UMD needs a Volt Free / Dry contact
V IN that opens when the motor is off, the contact should close when the motor is running.
V OUT Landing & Car Door Contact, The UMD needs a Volt Free / Dry contact
V IN that opens when the car door is open, the contact should close when the doors are closed.
ES1 External Emergency Stop, The UMD needs a Volt Free / Dry contact
ES2 that opens when the brakes needs to be deployed the contact should be linked across if not required
EXT1 External Overspeed Govenor, The UMD needs a Volt Free / Dry contact
EXT2 that opens when the brakes needs to be deployed the contact should be linked across if not required
RED
BLUE
YELLOW
GREEN
RED
BLUE
YELLOW
GREEN
COM Main Lift Safety Circuit, It should be wired in series with all other limit switches
N/0 The UMD provides a Volt Free / Dry contact, it will open when the brakes are deployed or lift is at electrical tripping speed.
COM Alert /Warning signal, a request to stop the lift at the next floor and take the lift out of service as a fault has been detected.
N/0 The UMD provides a Volt Free / Dry contact, it will open when there is a fault detected and closes whel all is OK.
Main Fuse
500mA
ALERT
SC
BRAKE B
BRAKE A
EXT
ESTOP
DOOR
MOTOR
ENCODER
LOAD
CELLS
RELAY
Circuit Breaker / Fuse
Lift Panel Isolator Switch
SENSOR PACK
Fitted to ROPE BRAKE
or IDLER PULLEY
or OVER SPEED GOVENOR
Connect cable braid to the Black wire or any Ground connection
Cable
Cable
Rope Brake A
Connect cable braid to the Green wire or any Ground connection
Cable
Rope Brake B
Connect cable braid to the Green wire or any Ground connection

18 Atwell International Limited
Mechanical Installation For information on mechanically installing the VG rope brakes or VG safety gear
please see the specific documentation for the individual items as supplied.
Please note this device is a precision encoder device and is not capable of
withstanding a drop or severe mechanical shock, so never use a hammer to adjust
it.
It is also sealed, there are no user adjustable or repairable parts inside it, all
warranties will be void and the product will be destroyed if you open it. If you
suspect it is faulty then replace it, return to Atwell International who will inspect
it and will supply a replacement unit if it was found to have failed under warranty.
Securely bolt the brackets supplied to the tapped holes provided in the rope brake
side bars, adjust backward or forward for slight tension against the rope.
It may be necessary to adjust the alignment of the wheel to the rope. This is done
by carefully unscrewing the M4 cap head retaining screw on the wheel, and then
sliding the wheel so the rope is centred on the wheel. Re-tighten the M4 cap
headscrew onto the shaft.
Check for smooth operation and no excessive play or run out.
Connect the other end of this sensor cable to the UMD-SRB02 panel via the
connecting plugs, if you have not done so yet.
Slight pressure only.
Allow further movement
on springs. Do not adjust
it so that the springs are
coil bound.
Connect sensor cable
to the sensor box.
M4 Screw

19UMD-SRB02 Version 1
Resetting the System
To “SET” the system for the very first time is the same procedure as each time you
need to “RESET” the system, and that is as follows.
• Check that all faults are cleared and that there is no reason why the lift cannot
be put back into service. i.e. reason for brakes to be deployed has been rectified.
(If there are faults rectify them first.)
• 1. Check the visual display on the UMD-SRB02 control panel for the reason of
engagement.
• 2. Carry out a visual inspection of the VG Rope Brake/s Checking which brake
has fully engaged.
• 3. Investigate the reason for the engagement and carry out the appropriate
action.
• 4. Read Local Hand Winding Instructions.
• 5. To reset the brake(s) Press the GREEN reset button.
• 6. Select Confirm to enter Reset Mode (relay should sound).
• 7. Perform a manual reset on the Brake/s and press the GREEN reset button on
the panel. The Screen will then return home. Download the VG Robe Brake Manual
for guidance.
• 8. On the deployed but not fully engaged rope brake, using the Rope Brake
handle to re-engage the drop jaw with the electro-magnet. Check the Rope Brake
set is lit on the control panel.
• 9. Hand wind the machine in the opposite direction of the engagement for
approximately 25mm. This will free the drop jaw from the ropes.
• 10. On the deployed and engaged rope brake, using the Rope Brake handle re-
engage the drop jaw with the electromagnet. Check the Rope Brake set is also lit
on the control panel.
• 11. Continue to follow the local hand-winding instructions for the geared
machine.
• NOTE: If there is no power and the battery backup has failed after 30minutes
release the drop jaw and insert the plastic mechanical stops at the back of the
drop jaw to prevent the jaw from re-engaging.
Normal Operation

20 Atwell International Limited
TO RE-INSTALL LIFT SERVICE FOLLOWING HAND WINDING
1. Ensure both rope brakes are reset and the corresponding green lights are lit on
the control panel.
2. Ensure the reason for the engagement has been fully investigated and resolved.
3. Check the lift is operating correctly.
WARNING - If the safety devices controlled by this controller are bypassed
it will revert to normal running in one hour.
4. The rope brakes will require lifting into position, and then they will hold there.
5. The System is now SET.
IF THE ROPE BRAKES ARE NOT RESETTING
• Check wiring and connections.
• Check the wiring of the switch and magnet.
• Check the connection of the 8 pin plug.
• Check for overspeed circuit fault.
Normal Operation
(continued)
Bypassing the System (Engineer Maintenance Control)
To “BYPASS” the system you will disable the movement detection function, but if
the lift over speeds or free falls then the brakes or safety gear will still be deployed.
This function is purely for testing and maintaining the lift. If you are sure you need
to bypass the movement detection then this is how it should be done.
• Select Menu.
• Mode Select.
• Select By-Pass.
• Select confirm.
• The controller will then remain in By-Pass for 1 hour only and then return
to normal running.
To get back to normal running mode.
• Select Menu.
• Mode Select.
• Run.