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Pitagora 4.0 – Door and access management


Door Management

According to the regulations (both EN81-20 and EN81-1), all elevators must be equipped with cabin and landing doors that allow access to the cabin but at the same time, when closed, prevent any access to the cabin and the shaft.

The Pitagora 4.0 controller manages all type of doors, either automatic or manual, through dedicated electronic cards installed inside the controller and wired according to the type of wiring.

On pre-wired systems, the Door card is placed inside the Top of Car box and connected via the JDOOR connector to the JDA/JDB connectors of the main top of car board.

A) Buttons for opening and closing doors
B) Screw terminals for door limit switches
C) Three-phase power supply IN
D) Three-phase power supply OUT
E) Door braking predisposition
T) Top of Cabin box

On controllers with wire terminals, the door card is placed inside the controller and connected via the JDOOR connector to the JDA/JDB connectors of the APPO card.

A) Buttons for opening and closing doors
B) Screw terminals for door limit switches
C) Three-phase power supply IN
D) Three-phase power supply OUT
E) Door braking predisposition
Q) Controller

Cabin door operator

The Pitagora 4.0 controller can drive the following tpes of cabin doors:

1) Manual doors

These are typically folding/grill or swing doors, operated exclusively manually, typical of older elevators. Manual cabin doors are necessarily coupled with manual landing doors. No electronic card is required for the management of manual cabin doors with Pitagora 4.0, however the related option is formally identified by the Q40.PCMA module and by the relevant Parameter in the Doors Menu of the controller (see below).

When the manual cabin door is closed, the safety chain point #5 is closed (removable bridge contact). They do not require any mechanical closing lock and any accidental opening causes the system to stop immediately.

2) Automatic doors

Automatic doors can be defined as Autonomous or Regulated:

Autonomous: this type of automatic door features an operator (motor) generally powered at 220 VAC, managed with a single command in voltage at 24 Vdc (Closing) and various inputs (limit switch and mobile edge). The Pitagora controller drives autonomous doors through the Q40.PCAT.x module (Door card) and the “Autonomous door” selection in the Doors Menu of the controller (see table below).

Regulated: this type of automatic door features a door regulator generally powered at 220 VAC and managed with a series of commands (opening, closing, slow closing, and common) and different inputs (limit switch and mobile edge). The Pitagora controller drives automatic regulated doors through the Q40.PCAT.x module (Door card) and the “Automatic door” selection in the Doors Menu of the controller (see table below).

3) Tri-phased doors

This particular case of automatic door, only applicable to non-EN81-20 elevators, features a tri-phased door operator (motor) driven by the controller. Typical operating voltages are:

  • 96 Vac
  • 105 Vac
  • 125 Vac
  • 400 Vac

Maximum allowed power is 300W. The last case (400V) includes a 30 mA RCD protection inside the controller.

The Pitagora controller drives automatic tri-phased doors through the Q40.PCTR.x module (Door card) and the “Automatic door” selection in the Doors Menu of the controller (see table below).

Note: In case of double access, two separate Door cards will be present in the system.

Cabin doorFloor door“Door type (A)” parameter
ManualManualManual / None
ManualMotorized
AutonomousManualAutonomous
Aut. regulatedManualCabin automatic
Aut. regulatedAutomaticFull automatic
Tri-phased
Tri-phased 400V

Landing doors

Generally, landing doors are never powered and can be divided into:

1) Manual doors

These are typically manually operated swing doors used in conjunction with both manual and automatic cabin doors. Manual doors are locked and unlocked via a mechanical system that intervenes on the door lock at the floor door and closes/opens the safety chain.

The mechanical door lock can be coupled to the cabin door operator or there can be a retiring cam mounted on the cabin. The retiring cam is controlled by a coil and by the LUPA Card mounted inside the TOC Box (or inside the controller cabinet in the case of a wire terminal controller). When the cabin is stopped at the floor, the retiring cam is released.

In the case of double access, the system is provided with two retiring cams, these are controlled in parallel by the same output, maintaining the same electrical absorption limits.

Retiring cams are present into the Pitagora system under the Q40.PTDC.x modules.

2) Automatic doors

These are doors with central or telescopic (lateral) locking, typical of more recent systems and standard on new systems. Landing doors are mechanically coupled to the cabin door operator when the cabin stops at the floor.

The correct closing of landing doors is monitored through the safety chain.

Additional contacts (monostable or bistable) must be added in the case of 81.21 installations (reduced headroom or pit) to monitor and protect theaccess to the shaft.

3) Motorized doors

These doors are a special type of manual swing doors equipped with a motorized operator driven directly by the controller. Electromechanical door locks are also present, with the same purpose and logic applied to manual doors.

Number and type of accesses

ThePitagora 4.0 controllercan handle up to two separate accesses to each floor. Number and type of access must be defined through the following parameter of the Door Menu:

ParameterValues
AccessSingle
Double selective
Double simultaneous
Double pass-through

While the single access case is straightforward, in the case of double access to the same floor some differences apply in the logic with which doors are opened. Note that, once defined through the above parameter, the same door opening logic is applied to all landings of the installation.

Example:

The elevator in this building has 3 stops and 5 landings.

Ground floor and floor 2 have 2 accesses each.

This is the behavior of the elevator driven by a Pitagora 4.0 controller in each case:

Double selective access

This option must be set when the number and layout of the buttons on the car operating panel faithfully reflects the number of landings of the elevator. There must be as many call buttons as the actual number of landings (double access on the same floor means TWO separate landings). When the cabin arrives at the floor with double selective access, only the door of the selected landing will open.

In the example above, if 2 selective access are set:

  • Car panel has 5 separate buttons
  • Total number of landing panels is 5
  • All landings are accessible separately, as if they all were at different altitudes

Double simultaneous access

This option must be set when the number and layout of the buttons on the car operating panel reflect the number of stops of the elevator. There must be as many call buttons as the actual number of stops (double access at the same floor means ONE stop). When the cabin arrives at the floor with double simultaneous access, both doors will be opened simultaneously.

In the example above, if 2 simultaneous access are set:

  • Car panel has 3 separate buttons
  • Total number of landing panels is 5
  • Doors at Ground floor and Floor 2 open on both sides simultaneously

Double pass-through access

This is a variant of the double selective option which allows to open the second door at floors with two landings, but only after the pressure of the relevant call button in the car operating panel. In such case, a pass-through is created at the floor.

In the example above, if we press the 2A button on the car operating panel, after the cabin has reached floor two and opened doors on side A, it is possible to open also doors on side B by pressing the 2B button.

Options on Doors

Doors powered during travel

This option, limited to automatic doors, indicates that the door operator is constantly powered when doors are closed, also during the travel of the cabin. It can be set from the Door Menu:

ParameterValues
Door A poweredNo
Yes
Yes – AT40

The “AT40” variant is relevant to a specific model of Fermator door.

Advance opening

This option, limited to automatic doors, allows the door opening to commence before the complete stop of the cabin at floor.

ParameterValues
Advance openingNo
Yes

Note: the advance opening option configure anopen-door manouver that require the presence of the UCM protection circuit.


Updated on 21 Gennaio 2025
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