Weber PL751A User manual
© Weber Lifttechnik GmbH
Version 2.0
30.9.2015 IP
Operating Manual
PL751A
STATUS 04-2016
Operating Manual PL 751A
Weber Lifttechnik GmbH
Page 2
Version 2.0
© Weber Lifttechnik GmbH
Copyright
© Copyright 2015 by
WEBER Lifttechnik GmbH, Fallersleber Straße. 12, D-38154 Königslutter
Warranty
This description has been created by WEBER Lifttechnik GmbH according to the best of their knowledge. All technical information has been
carefully determined and checked, and complies with the respective current status. Subject to changes and errors.
Our verbal and written application advice is intended to support your own work. This is deemed as non-binding information –also with regard
to any property rights of third parties - and shall not release you from the necessity to perform your own practice-orientated inspection of the
products regarding their suitability for the intended procedures and purposes.
The product descriptions do not contain any statements pertaining to liability for any damages. However, should liability come into question,
then this shall be limited to the value of the supplied and used goods.
Subject to technical changes.
We are grateful at any time for information regarding errors or suggestions and critical comments!
Weber Lifttechnik GmbH
Fallersleber Str. 12
D-38154 Königslutter
Germany
Tel.: +49 (0) 53 53 / 91 72 - 0
Fax: +49 (0) 53 53 / 91 72 - 22
Internet: www.weber-lifttechnik.de
Email: info@weber-lifttechnik.de
Hotline
Monday to Thursday 08:00 a.m. –05:00 p.m.
Friday 08:00 a.m.–04:00 p.m.
+49 (0) 53 53 / 91 72 30
+49 (0) 53 53 / 91 72 31
Any duplications, also as excerpts, shall only be permitted with the written consent of WEBER Lifttechnik GmbH.
Weber Lifttechnik GmbH
Operating Manual PL 751A
© Weber Lifttechnik GmbH
Version 2.0
Page 3
List of contents
1. Safety information..........................................................................................................................................4
1.1. Installation and connection information............................................................................................5
1.2. Setting the jumpers ..........................................................................................................................5
2. Function description.......................................................................................................................................6
3. Description of the hardware...........................................................................................................................7
3.1. Inputs and outputs............................................................................................................................8
3.2. Setting of DIL switches.....................................................................................................................9
4. Error messages .............................................................................................................................................9
5. Switch-off times and braking .........................................................................................................................10
5.1. Cable lifts with safety switching for approach and adjustment with open doors..............................10
5.2. Hydraulic lifts....................................................................................................................................10
6. Function test ..................................................................................................................................................11
7. Circuit diagram...............................................................................................................................................12
7.1. Safety circuit.....................................................................................................................................12
7.2. Circuit diagram PL751A ...................................................................................................................13
Appendix:
EU-type examination certificate
Annex 1 to EU-type examination certificate
EU-declaration of conformity
Operating Manual PL 751A
Weber Lifttechnik GmbH
Page 4
Version 2.0
© Weber Lifttechnik GmbH
1. Safety information
Important preliminary remarks and safety information pertaining to the
control units by Weber Lifttechnik GmbH
The following information for the assembly of our control units mainly contains generally valid
statements. This safety information makes no claim to completeness. Special instructions for
the handling and adjustment of the respective control unit type should be taken from the supplied
manuals.
The devices and machines used in or driven by our control units are equipment for use in high-
voltage systems. During operation, this equipment has hazardous live, moving or rotating parts.
Serious health or material damage can be caused through incorrect handling of the devices or
insufficient maintenance.
Persons responsible for the safety of the system must therefore ensure the following:
Only qualified personnel may be commissioned with working on the
devices and machines. Operating manuals and product documentation
must be available at all times and must be consistently observed during
work on the system.
Work on the devices and machines or within close proximity to these is
prohibited for unqualified personnel.
All accident prevention regulations and any further deviating or
supplementary regulations for special application areas and regional
special regulations must be observed.
All installations and settings for the electrical devices supplied by us are
to be performed by a certified electrician, or under their instruction and
supervision.
In this process, the generally valid regulations, guidelines and legislation
are to be observed, in particular also the EN and VDE (Association of
German Electricians) provisions.
Weber Lifttechnik GmbH
Operating Manual PL 751A
© Weber Lifttechnik GmbH
Version 2.0
Page 5
1.1. Installation and connection information
The PL 751A printed circuit board is intended for installation in the control cabinet and is
clipped on to a mounting rail on the mounting panel.
The supply voltage is 24V DC.
Taps from the safety circuit are to be undertaken on terminal blocks B and C. 230V AC is
applied to these terminals.
The air gaps and creepage distances (3 or 4mm) are to be measured so the circuit board
can be used up to 2000m above sea level.
Electronic devices contain sensitive components which must be protected against
contamination, humidity and mechanical damage.
Electrostatic discharges can destroy electronic components. These can be prevented by
previously touching an earthed metal part in order to statically discharge yourself.
Electronic equipment is not fail-safe, therefore the user is responsible for ensuring that, in
case of equipment failure, the drive is set to a safe state, otherwise harm to persons and/or
damage to materials can occur. The equipment is to be disconnected from the mains prior
to every intervention.
1.2. Setting the jumpers
There are 3 jumpers on the PL751A circuit board which are required for programming the circuit
board and which may only be set for this purpose.
Operating Manual PL 751A
Weber Lifttechnik GmbH
Page 6
Version 2.0
© Weber Lifttechnik GmbH
2. Function description
Software version: PL751A –V3
The EN81 specifies protection against unintended movement of the lift car in case the doors are
open. In order to fulfil this specification, the PL 751A circuit board has been developed. It can
take on the following monitoring functions:
Monitoring of type-tested braking elements which are used on lift systems for the
prevention of unintended movement of the lift car in case of open doors, e.g. contact-
monitored brakes or valves or speed restrictors with locking devices.
Monitoring of the main contactor
For control units with a setting for approaching and adjusting with open doors, a two-
channel safety switch is often used to bridge the open door and locking switch. Any
unintentional movement is therefore recognised by the PL751A when the lift car leaves
the door zone with open doors and with the main contactor dropped out.
In case of error, the safety relay K79 on the PL 751A is dropped and the safety circuit opened.
As a result, the lift is shut down. The voltage fail-safe re-start lock prevents unintentional
recommissioning of the system.
Because the main contactors and valve coilsare connected at the end of the safety circuit, these
contactors and valves drop out. The current flow to the motor and brakes, or the oil flow from
the cylinder to the hydraulic unit, are interrupted.
The lift stops independently of the individual drop-out time of the braking elements used. This
function is independent of the control unit computer.
The door zone area is normally set to the limits laid down in EN81, however this can be reduced
at any time if required by the system conditions.
It is to be observed that the lift car comes to a standstill within the permissible area after leaving
the flush position of the stop. Should it not stop in time, then the door zone is to be reduced until
the required area complies in all cases.
After an error has been recognised, only an authorised person may re-activate the lift. Switching
off and switching on the main switch, or loss and return of the power supply will not lead to a
reset of the PL 751A. For recommissioning of the lift, actuation of the reset button on the PL
751A is necessary. Additionally, a separate reset button can be connected. This reset button
may only be accessible to qualified persons. A reset signal is also generated via the travel button
of the inspection run equipment.
The correct function of the K79 safety relay is monitored internally via a forcibly actuated NC
contact. After each run, the relay is dropped once and the function of the relay contact and the
safety circuit tap are checked. Should the subsequent input “B2” not be de-energised after
opening the contact K79 in the safety circuit, then the error is stored and activation of the relay
prevented.
The output G1 “OK / Test”is connected to the lift control unit and normally conducts +24V. It is
briefly switched off during the test phase, and in case of an error it is permanently switched off.
The lift control unit interprets a duration of more than two seconds as an error and shuts down
the lift.
Weber Lifttechnik GmbH
Operating Manual PL 751A
© Weber Lifttechnik GmbH
Version 2.0
Page 7
The output G2 “No travel” can be used as a travel signal for the lift control unit. It carries a voltage
of +24V in case of a standstill of the lift car or is de-energised as soon as a main contactor is
actuated or a braking element is released at the inputs E4, E5, F3 or F4.
The output G3 carries a voltage of +24V provided the safety relay K79 is controlled by the
PL 751A.
The output G4 “Error display” provides pulses synchronously to the control of the LED “Fault”
which can be implemented by the lift control unit in a plain text error message. (See Point 4.
Error messages)
3. Description of the hardware
The PL 751A circuit board comprises of a computer core and the inputs and outputs, and is
covered by a labelling panel. On the labelling panel, all signals are designated and provided with
a terminal designation. On the PL 751A, both 230V AC as well as 24V DC inputs and a relay
contact for switching the safety circuit and standard outputs for 24V DC are provided.
PL 751A printed circuit board for recognition of unintentional movement of the lift
car with open doors
Operating Manual PL 751A
Weber Lifttechnik GmbH
Page 8
Version 2.0
© Weber Lifttechnik GmbH
3.1. Inputs and outputs
Terminal block A1 Supply 0V DC
Terminal block A2 Supply +24V DC, 1W
Terminal block B1 N neutral conductor input for tap 230V AC
Terminal block B2 Tap 230V AC, safety circuit prior to doors
Terminal block B3 Tap 230V AC safety circuit after doors and locking contacts
Terminal block B4 N‘neutral conductor output for tap 230V AC
Terminal block C1-2 Closing contact K79, 230V AC 4A
Terminal block E1 Input door zone 1 (adjustment switch upwards or
1st door zone switch)
Terminal block E2 Input door zone 1 (adjustment switch downwards)
Terminal block E3 Input not in use
Terminal block E4 Input brake 1 (or valve monitoring 1)
Terminal block E5 Input travel contactor 1
Terminal block F1 Input door zone 2
Terminal block F2 Input not in use
Terminal block F3 Input brake 2 (or valve monitoring 2)
Terminal block F4 Input travel contactor 2
Terminal block F5 Input reset, for separate reset button
Terminal block G1 Output OK / Test
Terminal block G2 Output travel contactors
Terminal block G3 Output K79 (indicates when the K79 relay is activated)
Terminal block G4 Output error display
For terminal blocks E, F and G:
Inputs: 24V DC 10mA
Outputs: 24V DC 150mA
Weber Lifttechnik GmbH
Operating Manual PL 751A
© Weber Lifttechnik GmbH
Version 2.0
Page 9
3.2. Setting of DIL switches
There is an 8-pole DIL switch on the PL 751A via which the following functions can be set.
Caution: The setting of the DIL switch may only occur when the main switch is switched off.
The switch setting “1”is labelled with “ON”. On delivery of the circuit board in a Weber control
unit, the switches are set to the required function.
Switch 2+1: Brake or valve monitoring. The monitoring contacts connected to the inputs E4
and F3 may optionallybe NC or NO contacts. The function can beset as follows:
0+0 = Braking or valve monitoring switched off
0+1 = NO contacts at both inputs
1+0 = NO at input E4, NC at input F3
1+1 = NC contacts at both inputs
Switch 4+3 Time for the brake monitoring:
0+0 = 1 second
0+1 = 2 seconds
1+0 = 3 seconds
1+1 = 4 seconds
The works setting on delivery totals one second.
Switch 5: Not used
Switch 6: Not used
Switch 7: Not used
Switch 8: Must be set so that an uneven number of switched-on switches results.
4. Error messages
The display of errors occurs via a light diode, the cover panel of which is labelled “Fault”. It
displays a pulse sequence beginning with a start pulse of 2 seconds in duration followed by a
number of shorter pulses corresponding to the error number.
Error no.: Function
1 Switch test, this error message occurs if an even number of DIL switches are
switched on.
2 The door zone has been left with the doors open.
3 Travel contactor monitoring, i.e. both inputs signalise a different position of the
main contactor.
4 Brake monitoring i.e. both inputs signalise a different position of the braking
element or the position of the braking elements is different to the main contactor.
5 Error of the 230V input cells (optocoupler)
6 Ram error
7 Flash error
8 Safety relay error
The output G4 “Error display” also supplies these pulses, which can be implemented by a lift
control unit in a plain text message.
Operating Manual PL 751A
Weber Lifttechnik GmbH
Page 10
Version 2.0
© Weber Lifttechnik GmbH
5. Switch-off times and braking
5.1. Cable lifts with safety switching for approach and adjustment with open doors
The braking contactor e.g. K1E is connected after the safety circuit and switches the brake coils
DC-side after the rectifier.
5.2. Hydraulic lifts
The safety valve with a 230V coil is connected after the safety circuit and is switched off by the
door zone relay.
Weber Lifttechnik GmbH
Operating Manual PL 751A
© Weber Lifttechnik GmbH
Version 2.0
Page 11
6. Function test
In order to check for correct function of the equipment against unintentional movement of the lift
car with open doors, the “TÜV Menu” can be selected on the operating panel of the Weber
control unit. The following steps are necessary for the test:
1. Select a stop and lock it. If possible, do not select the end stop.
2. If only two stops exists, then the test must be conducted upwards in the lower stop and
downwards in the upper stop.
3. In order to implement the inspection with closed doors, the safety circuit can be
interrupted by disconnecting the door contact for the duration of the test.
4. Call up the TÜV Menu of the control unit.
5. Select UCM test upwards or downwards. The test must be implemented in both
directions. For this test, a nominal speed is started in the selected direction.
6. The control unit now automatically implements the test.
7. On leaving the door zone, the bridging of the door contacts is cancelled by the safety
switching and an emergency stop is initiated.
8. For control units with absolute encoders, the distance to the flush position is indicated on
the display in mm. The distance must be measured for control units with magnetic switch
detection.
9. The lift may not independently start up again after the test or a recognised unintentional
movement. Normal operation is only then possible if the reset button has been actuated.
10.For cable lifts, the test “UCM: Brake on” can also be selected. In order to implement this
test; the S751 button, if present, may also possibly require actuation. The brake is
released for this test. The lift car is pulled away upwards by the counterweight.
Subsequently, Points 7-9 apply.
11.After completion of the inspection, the safety circuit is to be closed again if it had been
interrupted according to Point 3.
Operating Manual PL 751A
Weber Lifttechnik GmbH
Page 12
Version 2.0
© Weber Lifttechnik GmbH
7. Circuit diagram
7.1. Safety circuit
Weber Lifttechnik GmbH
Operating Manual PL 751A
© Weber Lifttechnik GmbH
Version 2.0
Page 13
7.2. Circuit diagram PL751A
Table of contents
