User manual

LF-10T Door Control Board

Document no: LF-LF10T-UM-ENRelease: v1.0Date: July 2026

01General Features

The LF-10T board is designed for elevator doors with 24 V DC motors, offering high-comfort door control. It uses the same parameter set as the LF-10; it differs in the terminal naming and in the PE terminal on the power input.

Drive and comfort

Comfortable travel · Automatic recognition of open and closed positions · Nudging mode · Audible warning in case of a jam

Installation and use

Easy assembly following ready-made installation logic · Operation compliant with fire regulations · Flexible parameter options · Clear presentation of the operating state on the display

Top view of the LF-10T board with terminals and components labelled — Figure 1 — General view

02Technical Specifications

Power supply input

Feature	Description
Supply voltage	20 V AC
Input protection	8 A glass fuse

Encoder circuit

Feature	Description
Encoder type	Incremental encoder
Supply voltage	5 V DC

Motor

Feature	Description
Motor voltage	30 V DC
Maximum current	7 A
Motor protection	Current protection

Input signals

Symbol	Description
`K5`	Open command signal input, 24 V DC
`K3`	Close command signal input, 24 V DC
`NDG`	Nudging command signal input, 24 V DC
`LIR`	Lirpomp close command signal input, 190 V DC

Output signals

Symbol	Description
`K20`	Full open contact
`K19`	Full closed contact
`K16`	Obstruction contact

03Terminals and Symbols

Terminal	Symbol	Description
Door power input	`220L`	System supply phase
	`220N`	System supply neutral
	`PE`	System protective earth
Relay output terminal	`K20`	Full open contact
	`K19`	Full closed contact
	`K16`	Obstruction contact
	`COM`	Relay common terminal
Command input terminal	`NDG`	Nudging command signal input, 24 V DC
	`K5`	Door open command signal input, activated by +24 V DC
	`K3`	Door close command signal input, activated by +24 V DC
	`GND` / `1000`	GND terminal for the command signal inputs
	`+24V`	+24 V DC output
LirPomp input terminal	`LIR`	190 V DC Lirpomp close command signal input for internal safety door applications
Motor terminal	`M1`	Motor power terminal
	`M2`	Motor power terminal
Encoder terminal	`A`	Encoder channel A input
	`B`	Encoder channel B input
	`GND`	Encoder supply (−)
	`+5V`	Encoder supply (+5 V DC)

Difference from the printed manual

The correct assignment is K5 open, K3 close. The two are swapped in this table in the printed manual; the pairing shown here is the corrected one. If you are comparing against your PDF or printed copy, this is the difference.

04Wiring Diagrams

Click a diagram to open it full size.

General wiring diagram

General diagram showing the connection of the transformer, motor and encoder to the LF-10T board — Figure 2 — General wiring diagram

Manufacturer wiring diagram

Diagram showing the connections on the manufacturer side — Figure 3 — Manufacturer wiring diagram

Installer wiring diagram

Diagram showing the connections on the installer side — Figure 4 — Installer wiring diagram

Signal connection

The command signals can be powered in two ways. Which one you use depends on where the +24 V comes from.

Powered from the control panel

Wiring diagram where the signal supply comes from the control panel — Figure 5

Powered from the door control board

Wiring diagram where the signal supply comes from the door control board — Figure 6

05Commissioning

FIRST SETTINGSDo this first

Once the door installation is complete, enter the configuration menu and set the options listed in the Menu section to suit the application.

Board start-up sequence

Flow chart showing the steps after the board is energised — Figure 7 — Board start-up flow diagram

Normal operation screen transitions

During normal operation, the + and − buttons navigate between screens. In manual drive mode, ENTER moves the door in the closing direction and ESC moves it in the opening direction.

Diagram of the transitions between screens in normal mode — Figure 8 — Normal mode screen transitions

When	Buttons	Result
As the board is first powered on	`+` and `−` together	Configuration menu with manufacturer access level
While the board is operating	`ESC` and `ENTER` together	Configuration menu with installer access level

To exit the configuration menu, press ESC repeatedly until the Exit? prompt appears. When it is displayed, press ENTER to return to normal operation mode.

06Menu and Parameters

Parameters with a Manufacturer access level are only visible on the configuration menu entered with manufacturer authorisation.

1 — Language

Options	Description	Access level
`TR` `EN` `FR` `DE` `GE`	Selects the display language. No submenu.	Unlimited

2 — General settings

Submenu	Options	Description	Access level
Demo?	`Enabled` `Disabled`	When demo mode is enabled, the door continuously performs opening and closing cycles.	Unlimited
Command type	`Close Only` `Open & Close`	With `Open & Close`, the door operates with both open and close command signals. With `Close Only`, it operates using the close and Lirpomp commands.	Unlimited
Door type	`Full Automatic` `Semi-Automatic`	—	Unlimited
Manufacturer	`GENERAL` …	Loads manufacturer-specific parameter settings according to the selected manufacturer.	Manufacturer
Reset position	—	Clears the stored door position data and starts the door learning process again.	—

3 — Speed settings

If any option other than MANUAL is selected for Factory Preset, the remaining speed parameters are hidden from the menu.

Submenu	Range	Description	Access level
Factory preset	`SLOW` `MEDIUM` `FAST` `MANUAL`	Restores the door speed parameters to the factory preset values; with `MANUAL` selected each parameter can be adjusted individually.	Unlimited
Closing speed	0 – 400 mm/s	Sets the maximum target speed during door closing.	Unlimited
Closing slow speed	0 – 100 mm/s	Sets the creeping speed as the door approaches the fully closed position.	Unlimited
Closing slow distance	0 – 100 mm	Sets the creeping distance before the door reaches the fully closed position.	Unlimited
Closing spoon speed	0 – 100 mm/s	Sets the closing speed during the door spoon engagement phase.	Unlimited
Acceleration on close	0 – 1000 mm/s²	Sets the maximum target acceleration during door closing.	Manufacturer
Opening speed	0 – 450 mm/s	Sets the maximum target speed during door opening.	Unlimited
Opening slow speed	0 – 100 mm/s	Sets the creeping speed as the door approaches the fully open position.	Unlimited
Opening slow distance	0 – 100 mm	Sets the creeping distance before the door reaches the fully open position.	Unlimited
Opening spoon speed	0 – 100 mm/s	Sets the door speed during the spoon opening phase.	Unlimited
Acceleration on open	0 – 1000 mm/s²	Sets the maximum target acceleration during door opening.	Manufacturer
Spoon length	0 – 100 mm	Sets the spoon length parameter.	Manufacturer
Nudging speed	0 – 200 mm/s	Sets the nudging speed.	Unlimited

4 — Control settings

Submenu	Range	Description	Access level
Current KP	0 – 1000	Proportional gain for the current control loop.	Unlimited
Speed KP	0 – 1000	Proportional gain for the speed control loop.	Unlimited
Closed holding force	0 – 300	Sets the force applied by the motor while the door is in the fully closed position.	Unlimited
Open holding force	0 – 250	Sets the force applied by the motor while the door is in the fully open position.	Unlimited
Obstruction force	0 – 600	Sets the maximum force applied by the door while closing to overcome an obstruction.	Unlimited
Closed position control force	0 – 700	Sets the motor force applied at the fully closed position.	—
Open position control force	0 – 700	Sets the motor force applied at the fully open position.	—

Obstruction behaviour

If an obstruction is detected while closing

The door stops.
The obstruction position is stored in memory.
Relay K16 is energised to send the obstruction signal to the controller.
The door opens fully.
Relay K16 releases.
The door returns to normal operation.

As the door approaches the stored obstruction position, it slows down.

If an obstruction is detected while opening

The door stops.
The obstruction position is stored in memory.
A closing command is awaited for 5 seconds.
If a closing command arrives, the door closes.
If the open signal is still active, the door attempts to open again.

The door passes the previously detected obstruction area at a reduced speed. If the obstruction is cleared, the door returns to normal operation; otherwise, the same procedure is repeated.

5 — Motor settings

Submenu	Range	Description	Access level
Encoder pulses	0 – 2048	Number of encoder pulses generated per motor revolution.	Manufacturer
Motor speed (RPM)	0 – 3000	Sets the motor speed in revolutions per minute.	Manufacturer
Gear ratio	0 – 50	Sets the motor gearbox reduction ratio.	Manufacturer
Drive wheel circumference	0 – 50	Sets the circumference of the drive wheel.	Manufacturer

6 — Factory settings

Options	Description	Access level
`Reset Device`	Restores the device to its factory default settings. No submenu.	Unlimited

07Troubleshooting

The situations most often met in the field and the points to check, in order.

The door does not moveCheck the power first

Verify the 220 V AC input.
If the 24V LED is off, check the glass fuse.
Check the motor power connections.
Verify the door open and close command signals.

The door does not openSignal

Make sure the close signal (K3) LED is off and the open signal (K5) LED is on.

The door does not closeSignal

Make sure the close signal (K3) LED is on.

Manual door learning does not startLearning

If learning does not start even though ENTER is held down: signals sent by the main controller take priority, so disconnect the K3, K5 and NDG signal input connections before starting the manual door learning process.

The door slams or slows down too earlyLearning

Perform the door learning procedure again and check the operation.

Frequent obstruction detectionMechanics / parameter

Check the encoder connection.
The obstruction force setting may be too low.
Inspect the door mechanism for mechanical issues.

The door panels vibrateParameter

Check the Current KP value.
Check the encoder connection.

The display reads Closed while the lock is closedMotor direction

If the display shows Closed immediately after power-on while the door mechanism is locked and the door does not move, the motor rotation direction is incorrect. Power-cycle the controller and press ESC when the motor direction change warning appears.

In the open position the door closes and opens 2–3 cmSpring / force

If the problem occurs on a single floor only, check whether the door spring on that floor is too stiff.
The open holding force value may be set too low; increase it.

08Board Dimensions

Technical drawing showing the mounting holes and outer dimensions of the LF-10T board — Board mounting dimensions (mm)