Record FlipFlow TWIN User manual

record FlipFlow Twin
User Manual
Your global partner for entrance solutions www.record.group

Document identification
Article nr.: 121-006454269
Version: 3.0
Publication date: 16/11/2023
Translation of the original manual
Subject to technical modifications
Copyright © agtatec ag

Table of contents
BAL_FF_TWIN_EN_3V0_REC_121-006454269 3 / 32
Table of contents
List of changes ................................................................................................................................................. 5
1 Safety................................................................................................................................................................. 6
1.1 Presentation of warning signs ............................................................................................................... 6
1.2 Intended purpose of use ....................................................................................................................... 6
1.3 General hazards.................................................................................................................................... 6
1.4 State of technology ............................................................................................................................... 9
1.5 Personal protective equipment.............................................................................................................. 9
1.6 Spare parts and liability......................................................................................................................... 10
2 General information ......................................................................................................................................... 11
2.1 Purpose and use of the instructions...................................................................................................... 11
2.2 Copyright............................................................................................................................................... 11
2.3 Product identification............................................................................................................................. 11
2.4 Manufacturer ......................................................................................................................................... 11
2.5 Target groups........................................................................................................................................ 11
2.6 Definition of terms ................................................................................................................................. 12
3 Description........................................................................................................................................................ 13
3.1 Product overview................................................................................................................................... 13
3.2 General Description [ ............................................................................................................................ 14
3.3 Safety features and controls ................................................................................................................. 14
3.3.1 Operating unit .................................................................................................................................. 14
3.3.2 iPort.................................................................................................................................................. 14
3.3.3 Traffic lights...................................................................................................................................... 14
3.3.4 BDE-Lock key switch ....................................................................................................................... 14
3.3.5 Emergency open button (options).................................................................................................... 15
4 Specifications ................................................................................................................................................... 16
4.1 Dimensions ........................................................................................................................................... 16
4.2 Electrical inputs and connections.......................................................................................................... 16
5 Operation .......................................................................................................................................................... 18
5.1 Menu ..................................................................................................................................................... 18
5.2 Performing a reset................................................................................................................................. 19
5.3 Lock the operating unit.......................................................................................................................... 19
5.4 Operating modes and functions ............................................................................................................ 20
5.4.1 INTERLOCK operating mode .......................................................................................................... 20
5.4.2 CLOSED and LOCKED operating mode ......................................................................................... 21
5.4.3 OPEN operating mode..................................................................................................................... 21
5.4.4 FLOW operating mode..................................................................................................................... 21
5.4.5 CLEANING mode............................................................................................................................. 22
5.4.6 MAINTENANCE mode..................................................................................................................... 22
5.4.7 Function Authorised access............................................................................................................. 23
5.4.8 Function Emergency opening .......................................................................................................... 23
5.4.9 Function Emergency closing............................................................................................................ 23
5.4.10 Function POWERSAVE ................................................................................................................... 23
5.4.11 Function Antipassback..................................................................................................................... 23
5.4.12 Function in case of power failure (POWER-UP) .............................................................................. 24
6 Inspection and maintenance ........................................................................................................................... 25
6.1 General remarks ................................................................................................................................... 25
6.2 Operator duties ..................................................................................................................................... 26

Table of contents
4 / 32 BAL_FF_TWIN_EN_3V0_REC_121-006454269
7 Malfunctions ..................................................................................................................................................... 28
7.1 Status displays ...................................................................................................................................... 28
7.2 Error displays ........................................................................................................................................ 28
7.3 Examples of errors / alarms ................................................................................................................. 28
7.3.1 Power failure .................................................................................................................................... 28
7.3.2 Wrong direction alarm...................................................................................................................... 28
7.3.3 Technical alarms.............................................................................................................................. 29
7.3.4 Intrusion alarm ................................................................................................................................. 29
7.3.5 Anti-pass-back alarm ....................................................................................................................... 29
7.3.6 Throw-in alarm (optional) ................................................................................................................. 29
8 Taking out of service and disposal ................................................................................................................ 30
8.1 Decommissioning.................................................................................................................................. 30
8.2 Dismantling and disposal ...................................................................................................................... 30

List of changes
BAL_FF_TWIN_EN_3V0_REC_121-006454269 5 / 32
List of changes
Change Location
Complete revision of all Sections and content Entire document
New Section structure Entire document
Revision of all graphics Entire document

1Safety
6 / 32 BAL_FF_TWIN_EN_3V0_REC_121-006454269
1 Safety
1.1 Presentation of warning signs
Various symbols are used in this guide for easier understanding:
NOTICE
Useful advice and information to ensure correct and efficient workflow of the system.
CAUTION
Against a potential hazardous situation that can lead to minor personal injury and property
damage.
WARNING
Against a latent hazardous situation that can lead to severe injuries or death and cause sub-
stantial property damage.
DANGER
Against an imminent hazardous situation that can lead to severe injury or death.
DANGER
Against an imminent or latent hazardous situation that could lead to electric shock and cause
serious injury or death.
1.2 Intended purpose of use
The system is designed exclusively for use as a pedestrian passage. The installation must only occur
in dry areas. If there are deviations, then proper waterproofing and water drains will be required on
site.
Any other application or use beyond this purpose is not considered to be an intended purpose. The
manufacturer bears no liability for any resulting damage; the operator alone shall bear the associated
risk.
The intended purpose also includes observation of the operating conditions specified by the manufac-
turer, in addition to regular care, maintenance and repair.
Interventions in or alterations to the installation performed by non-approved maintenance technicians
exclude the manufacturer's liability for consequential damages.
NOTICE
The operation of an automatic door in combination with a wicket door must only take place if
the latter is in a secured position.
1.3 General hazards
The following section lists hazards that can be caused by the system even when used as intended.
To reduce the risk of malfunction, damage to property or injury to persons and to avoid dangerous
situations, the safety instructions listed here must be observed.
The specific safety instructions in the other sections of this manual must also be observed.

Safety 1
BAL_FF_TWIN_EN_3V0_REC_121-006454269 7 / 32
DANGER
Electric Shock!
In case of contact with live parts, there is an immediate danger to life due to electric shock. Damage
to or removal of the insulation or individual components can be life-threatening.
a) Before starting work (cleaning, maintenance, replacement) on active parts of electrical systems
and equipment, ensure that all poles are voltage free and that this is maintained for the duration
of the work.
b) Keep moisture away from live parts. This can lead to a short circuit.
c) Never bridge fuses or put them out of operation.
d) Do not connect the power supply until all work has been completed.
e) Have work on the electrical system performed by qualified personnel only.
DANGER
Serious or fatal injuries!
If safety devices of the fire protection system do not function properly, there is a risk of serious or
fatal injuries.
a) Never disconnect the fire protection system from the power supply overnight.
b) Do not disassemble, put out of operation or manipulate safety devices.
c) Do not remove safety instructions on the system.
d) Never block, hold open or otherwise prevent fire doors from closing.
e) Have inspection, service and maintenance of the fire protection system carried out in accord-
ance with locally applicable regulations or according to a maintenance contract.
f) Have the fire protection system checked and maintained according to the state of the art.
WARNING
Serious injuries and major material damage.
Incorrect mounting can lead to serious injuries and/or cause major material damage.
a) Observe and comply with all important instructions regarding safe assembly.
CAUTION
Risk of malfunctions, material damage or injuries!
Improper settings can lead to malfunctions, material damage or injuries.
a) Do not disconnect the system from the power supply overnight.
b) Settings should only be made by personnel qualified to do so.
c) Do not disassemble, put out of operation or manipulate safety devices.
d) Have faults rectified by specialist personnel or by personnel qualified to do so.
e) Have service and maintenance carried out according to locally applicable regulations or accord-
ing to a maintenance contract.

1Safety
8 / 32 BAL_FF_TWIN_EN_3V0_REC_121-006454269
CAUTION
Risk of malfunctions, material damage or injuries!
Insufficient or inattentive cleaning or care of the system can lead to malfunctions, material damage or
injuries.
a) Check the sensors regularly for dirt and clean them if necessary.
b) Regularly remove dirt accumulations in the floor rail or under the floor mat.
c) Keep the system free from snow and ice.
d) Do not use aggressive or caustic cleaning agents.
e) Use road salt or loose chippings only conditionally.
f) Lay the floor mat without folds and flush with the floor.
g) Equipment required for cleaning purposes such as ladders or similar must not be leaned on or
attached to the system.
CAUTION
Risk of material damage or injuries!
The door can open, close or turn unexpectedly. This may result in material damage or injuries.
a) No persons may be present in the opening area of the system.
b) Ensure that moving objects such as flags or parts of plants do not enter the detection range of
the sensors.
c) Do not make any settings on the control unit when the system is in use.
d) Have faults rectified immediately by specialist or personnel qualified to do so.
e) Remove objects from the opening area.
f) Do not disassemble, put out of operation or manipulate safety devices.
g) Do not rush through a closing system.
CAUTION
Risk of bruising and severing of limbs!
If the system moves, careless behaviour can lead to serious injuries to limbs or severance of limbs.
a) Do not reach in when parts of the system are moving.
b) Keep a distance when parts of the system move.
c) Do not bump into or touch the system when it is moving.
d) Do not open or remove protective covers during operation.
e) Do not permanently remove covers from the system.
f) Only carry out inspection, service, maintenance and cleaning when the system is stationary and
switched off.
CAUTION
Risk of material damage or injuries!
If safety devices are not functioning, manipulated or put out of operation, there is a risk of material
damage or injuries that can lead to death.
a) Never disable or manipulate safety devices.
b) Have inspection, service and maintenance of the safety devices carried out according to local
regulations or according to a maintenance contract.

Safety 1
BAL_FF_TWIN_EN_3V0_REC_121-006454269 9 / 32
CAUTION
Risk of malfunctions, material damage or injuries!
If unauthorised persons use the system, there is a risk of malfunction, material damage or injuries.
a) Children under 8 years of age may only use the system under supervision.
b) Children must not play, clean or maintain the system.
c) Persons with limited physical, sensory or mental abilities as well as persons with insufficient
knowledge or experience may only use the system under supervision or must have received and
understood instructions to do so.
NOTICE
The country-specific regulations must be observed and complied with.
NOTICE
To avoid malfunctions, moving objects such as flags or parts of plants must not be allowed to
enter the detection range of the sensors.
NOTICE
The installation must be inspected during the function and safety check for imbalance and
signs of wear or damage to cables, springs and fastening parts.
The equipment must NOT be used if repair or adjustment work needs to be carried out.
NOTICE
Before work can be started, persons must be barred from the system and the danger area.
1.4 State of technology
The system has been developed in accordance with the state of the art and recognized safety regula-
tions and, depending on the options and dimensions, meets the requirements of the Machine Direct-
ive 2006/42/EC.
Nevertheless, hazards to the user may arise if the system is not used as intended.
NOTICE
Installation, commissioning, inspection, maintenance, and repair work must only be conduc-
ted by qualified, trained and authorized technicians.
After commissioning or repair work, fill in the check list and give it to the customer for safe
keeping.
We recommend obtaining a service agreement.
1.5 Personal protective equipment
Personal protective equipment is used to protect persons from adverse effects on health. Personnel
must wear personal protective equipment during the various work activities on and with the system.
Personal protective equipment is explained below:
Hearing protection is used to protect the hearing from noise. As a rule of
thumb, hearing protection is compulsory from when normal conversa-
tion with other people is no longer possible.

1Safety
10 / 32 BAL_FF_TWIN_EN_3V0_REC_121-006454269
The head protection serves to protect against falling and flying parts
and materials. It also protects the head from bumping into hard objects.
Protective goggles protect the eyes from flying parts, dust, splinters or
splashes.
Protective gloves are designed to protect hands from friction, abrasions,
punctures or serious injury and from burning caused by contacting hot
surfaces.
Safety shoes protect the feet from crushing, falling parts and slipping on
surfaces. The puncture resistance of the shoes ensures, that pointy ob-
jects do not penetrate the foot.
The high-visibility vest is used to make the personnel stand out and
therefore to be seen. With improved visibility and attention, the high-vis-
ibility vest protects personnel in busy work areas from collisions with
vehicles.
Depending on the place of work and the working environment, the protective equipment varies and
must be adapted accordingly. In addition to protective equipment for specific work, the work site may
require other protective equipment ( for example a harness).
In hygiene-protected areas, special or additional requirements of personal protective equipment may
be required. These requirements must be considered when choosing personal protective equipment.
If there is any uncertainty regarding the choice of personal protective equipment, the safety officer
must be consulted at the place of work.
1.6 Spare parts and liability
Reliable and trouble-free operation of the door is only guaranteed when using parts that were recom-
mended by the manufacturer. The manufacturer declines any liability for damages resulting from un-
authorized modifications to the door or the use of parts that are not permitted.

General information 2
BAL_FF_TWIN_EN_3V0_REC_121-006454269 11 / 32
2 General information
2.1 Purpose and use of the instructions
These instructions are an integral part of the system and enable efficient and safe handling of the sys-
tem. In order to ensure proper functioning, the instructions must be accessible at all times and kept in
the immediate area of the system.
Although only the male form has been chosen for reasons of better legibility, the information refers to
members of both sexes.
The operator must have read and understood the manual before starting any work. The basic require-
ment for safe working is to follow the safety instructions and the handling instructions. In addition, the
local regulations and safety rules apply.
The manual can be handed over in extracts to instructed personnel who are familiar with the opera-
tion of the system.
The illustrations are for basic understanding and may differ from the actual presentation. Specific rep-
resentations are contained in the drawings.
NOTICE
A replacement of the instructions is available from the supplier or on the website.
2.2 Copyright
The copyright of the instructions remain at:
© ASSA ABLOY
It is prohibited to reproduce, distribute or use the manuals for purpose of competition without the writ-
ten authorization of ASSA ABLOY.
Violation of the here stated copyrights will be prosecuted and fined with compensation of damage.
2.3 Product identification
The nameplate located on the door provides accurate identification of the product.
2.4 Manufacturer
ASSA ABLOY Entrance Systems AB
Lodjursgatan 10
SE-261 44, Landskrona
SWEDEN
2.5 Target groups
CAUTION
Risk of injury!
If unqualified personnel work on the system or are in the danger zone of the system, dangers may
arise which can cause serious injuries and considerable material damage.
a) All work must be carried out by qualified personnel only.
b) Keep unqualified personnel away from danger areas.
This operating manual is intended for the target groups listed below:
– Operating entity of the system:
the person who is responsible for the technical maintenance of this system
– Operator of the system:
the person who operates the system every day and has been suitably instructed

2General information
12 / 32 BAL_FF_TWIN_EN_3V0_REC_121-006454269
2.6 Definition of terms
Term: Explanation:
System The term is also used in these instructions as a synonym for the product. Door op-
erators, revolving doors, sliding doors, etc. are referred to as a system.
If information in these instructions refers to a specific type, this is shown accordingly
in the text.
User Users are all persons who use the system.
System operator The respective owner is referred to as the system operator, regardless of whether
they operate the system as the owner or pass it on to third parties.
Authorized representative The authorized representative takes over certain parts of the manufacturer's obliga-
tions about fulfilling the requirements of the Machinery Directive. In particular, the
authorized representative may also place the system on the market and/or sign EC
declarations of incorporation.
Qualified personnel Qualified personnel are authorized and appropriately trained to perform the follow-
ing work:
– Disassembly, Assembly, Commissioning, Operation, Audit, Maintenance,
Troubleshooting, Decommissioning
The qualified personnel have several years of professional experience in the tech-
nical field, e.g., as mechanics or machine fitters.
The qualified personnel are aware of the residual risks arising from the installation
site and, due to their professional training, knowledge, and experience, can carry
out the work assigned to them and to independently identify and avoid possible
danger points.
Manufacturer The manufacturer is whoever designs and/or builds machinery or incomplete ma-
chinery under the scope of the Machinery Directive.
Life phases All phases of the system's condition and use are referred to as life phases. This ap-
plies from the time the system leaves the factory until it is disposed of.
Personnel All persons who carry out activities on and with the system are referred to as per-
sonnel. Personnel can be, for example, the operator, the cleaning staff, or the se-
curity staff. The personnel meet the personnel qualifications required by the manu-
facturer.
Service technician Experts and specialists or representative authorized by the manufacturer to perform
commissioning, maintenance, and servicing.

Description 3
BAL_FF_TWIN_EN_3V0_REC_121-006454269 13 / 32
3 Description
3.1 Product overview
1 Cover exit
– Sensor
– Pictogram (option)
– Door leaf drive
– Signal light
– Speake (option)
– Locking (option)
2 Post
– Sensor
– LED strip (option)
– Emergency open switch (option)
3 Side panel
– Sensor (option)
– Running lights (option)
4 Door leaf
5 Cover entrance
– Sensor
– Pictogram
– Door leaf drive
– Control unit
– Key switch
– iPort
– Speake (option)
– Locking (option)
6 Cover
– Sensor
– Control board
– Service hatch
– Lighting
– Siren (option)
– Dust roof (option)
– Volumetric room monitoring (option)

3Description
14 / 32 BAL_FF_TWIN_EN_3V0_REC_121-006454269
3.2 General Description [
The system is designed for automatic handling of passenger traffic in and around airports and other
security-sensitive buildings. People walk individually through the corridor in only one direction and
without the ability to go back in the direction they came from, i.e. in the opposite direction. The system
also prevents uncontrolled access by people coming from a public area to a security zone or a protec-
ted area.
Applications:
– At airports between public areas and security zones (e.g. landside/airside)
– For the protection of other security sensitive areas such as ports and railway stations
– For controlling access to public buildings or industrial facilities
3.3 Safety features and controls
3.3.1 Operating unit
The BDE-D operating unit is an input and output unit for
the operation and limited programming of the system.
The display shows information about the system by
means of symbols and text.
3.3.2 iPort
The iPort is an integrated connection for control and pro-
gramming devices.
3.3.3 Traffic lights
The signalling depends on the selected operating mode and the additional functions ordered by the
customer. In the basic version, the system has an LED display on the door.
3.3.4 BDE-Lock key switch
The BDE-Lock key switch is used to lock or unlock the
BDE-D control unit for the door.
If the BDE-Lock key switch is turned to blocked, the op-
erating unit is blocked - changes to the operating mode
can only be made by unlocking the BDE-Lock key
switch.

Description 3
BAL_FF_TWIN_EN_3V0_REC_121-006454269 15 / 32
3.3.5 Emergency open button (options)
In the event of a system failure or panic, the emergency
escape switch can be operated to bring the system into
the safety position.
To return to normal operation, the emergency open push
button must be reset manually. An acoustic reminder
sounds at regular intervals.
However, a command from the BMS to "total opening"
always has priority: open both doors.
When the emergency open - middle door (Triple) is actu-
ated, the middle and exit doors open.
When the emergency open - exit door is actuated, the
exit door opens, the middle door only if someone is still
in tunnel 1.
Status:
– lighting on.
– Entrance door closed and locked.
– LED strip at the entrance red, in the middle (Triple)
and at the exit green.
– Pictograms at entrance and exit red.

4Specifications
16 / 32 BAL_FF_TWIN_EN_3V0_REC_121-006454269
4 Specifications
4.1 Dimensions
B
J G
A C D
Dimensions (millimetre / inch)
Door type 650 900 1100 1200 1400
A650 mm / 25.591 in 900 mm / 35.433 in 1100 mm / 43.307
in
1200 mm / 47.244
in
1400 mm / 55.118
in
A = routing width
B3522 mm / 138.66 in
C3150 mm / 124.02 in
D980 mm / 38.465 in 1230 mm / 48.307
in
1430 mm / 56.181
in
1530 mm / 60.118
in
1730 mm / 68.110
in
G2150 mm / 84.65 in
G = routing height
J2363 mm / 93.03 in
J = total height
4.2 Electrical inputs and connections
DANGER
Electric Shock!
In case of contact with live parts, there is an immediate danger to life due to electric shock. Damage
to or removal of the insulation or individual components can be life-threatening.
a) Before starting work (cleaning, maintenance, replacement) on active parts of electrical systems
and equipment, ensure that all poles are voltage free and that this is maintained for the duration
of the work.
b) Keep moisture away from live parts. This can lead to a short circuit.
c) Never bridge fuses or put them out of operation.
d) Do not connect the power supply until all work has been completed.
e) Have work on the electrical system performed by qualified personnel only.

Specifications 4
BAL_FF_TWIN_EN_3V0_REC_121-006454269 17 / 32
DANGER
Danger to life in case of faulty installation
a) There is an immediate danger to life by electric shock when touching live parts. Incorrect install-
ation of individual components can be life-threatening.
ðIf possible, the wiring for low voltage and mains voltage should be installed in a separate cable
duct.
ðAll wiring must be routed, secured and protected from moving parts, heat sources and sharp
edges.
ðAll electrical components inside the covers, must lie securely or be fixed with adhesive tape.
NOTICE
Electrical inputs are located on the control unit. Inputs for the power supply line are available
at each column.
NOTICE
If several systems are installed in parallel, the power supply must be provided via the floor on
the two outer columns.
NOTICE
The building management system cables can also be connected via the floor. However, they
must never be connected to the 115 / 230 VAC supply cables.
NOTICE
The system is designed for a fixed connection to the electrical supply network. Proper earth-
ing must be provided and the cabling must comply with local regulations.
Electrical data: 115 / 230 VAC / 50-60 Hz / 1000 watts | 1 Phase / 3 Wires

5Operation
18 / 32 BAL_FF_TWIN_EN_3V0_REC_121-006454269
5 Operation
5.1 Menu
NOTICE
The keys on the operating unit are used to set the operating modes in the main menu and the
system parameters in the submenu.
The functions of the keys differ from the main menu to the submenu.
Main menu
Key Name Operation Capacity Display example
Open Press key 1 x Open, sensors deactivated
Star Without function Without function
Interlock Press key 1 x Monitoring from both direc-
tions
Locked Press key 1 x Door closed, sensors deac-
tivated
Info Restart control unit
Press the key for 5
seconds
Restart control unit
No
Reset controller?
Yes
Restart hardware oper-
ating unit Press the key
for 12 seconds
Restart hardware operating
unit
Press key 2 x Access to parameter menu
Flow Press key 1 x Monitoring from both direc-
tions
NOTICE
The return from the submenu to the main menu takes place automatically 3 minutes after the
last entry.

Operation 5
BAL_FF_TWIN_EN_3V0_REC_121-006454269 19 / 32
Submenu
Key Name Operation Capacity Display example
Enter Press the key 1 x to ac-
cess the next submenu.
Select menu item (ex: error,
status, parameter), confirm
entry
Plus Press the key 1 x to
move down.
Navigation down in the
menu
Minus Press the key 1 x to
move upwards.
Navigation upwards in the
menu
Clear Press the key 1 x to re-
turn to the previous
menu
Exit menu item without sav-
ing
5.2 Performing a reset
Reset of the operating unit
Step Key Operation Capacity Display example
1. Press key for 12 seconds Reset the operating unit
(connection is established)
Reset the control system
Step Key Operation Capacity Display example
1. Press key for 5 seconds Reset the control system
No
Reset controller?
Yes
2. Press key 1 x Cancel reset
Press key 1 x Performing a reset
5.3 Lock the operating unit
NOTICE
If the key switch BDE-Lock is turned to blocked, the operating unit is locked. Alternatively, the
operating unit can be locked via the keyboard.

5Operation
20 / 32 BAL_FF_TWIN_EN_3V0_REC_121-006454269
Activate operation lock via keyboard
Key Operation Capacity Display example
Press the key sequence as shown
To deactivate, press the key se-
quence again
No settings can be made
on the operating unit.
Activating the operation lock with the key
Prerequisite Operation Capacity Display example
The desired operat-
ing mode is set.
Activate/deactivate the operating
lock with the key
No settings can be made
on the operating unit.
5.4 Operating modes and functions
NOTICE
The TWIN system type consists of one entrance (entrance door) and one exit (exit door). The
TRIPLE system type has an additional middle door. The chapters apply to both system types.
5.4.1 INTERLOCK operating mode
NOTICE
INTERLOCK mode has fewer passage varieties than FLOW mode but offers maximum secur-
ity, even between two arrivals, a time where the number of passengers is low.
Initial state:
– Lighting on.
– Entrance door closed.
– Centre door closed.
– Exit door closed.
– LED strips green.
– Pictogram at entrance green.
– Pictogram at exit red.
Cycle:
– A person is detected by the entrance sensor and the door opens.
– The person enters the tunnel and closes the entrance door if no other person approaches within a
parameterizable period or the maximum number of persons has been reached. Once the system has
decided to close the door, the LED strips at the entrance change to red.
– The LED strips in the centre and at the output flash to indicate to the person that they should wait.
– As soon as the entrance door is closed, the centre door and exit door open and at the same time the
colour of the LED strip in the centre and at the exit changes to green and the LED strip at the en-
trance flashes.
– The person(s) leave(s) the tunnel, the centre door and exit door close.
– In order to increase throughput and reduce possible waiting times, the entrance door opens again
when the exit door is closed and the airlock is empty. After a short waiting period, the entrance door
closes again. If the sensor of the entrance door detects another person, the system returns to its nor-
mal INTERLOCK mode.
– End of cycle