CARLO GAVAZZI SMXL20 User manual

SMXL20
SMX20
Lift Levelling Modules
Carlo Gavazzi Industri A/S Over Hadstenvej 40, 8370 Hadsten, Denmark
Instruction manual
Manual de instrucciones
Manuale d’istruzioni
ENESIT

2Rev. 1 | 03/2021 | SMXL20 / SMX20 Lift Levelling Module | © 2021 | CARLO GAVAZZI Industri A/S
EN
Table of contents
1. Introduction...........................................................................................................................................4
2. Safety....................................................................................................................................................5
2.1 Lift safety standards.............................................................................................................................................5
2.2 Functional safety.................................................................................................................................................5
3. Installation and environmental conditions..............................................................................................6
4. Wiring...................................................................................................................................................7
4.1 Power supply......................................................................................................................................................7
4.2 Wiring ..............................................................................................................................................................7
5. Devices..................................................................................................................................................8
6. SMXL20.................................................................................................................................................9
6.1 Terminal layout ...................................................................................................................................................9
6.2 Operating modes................................................................................................................................................9
6.2.1 Manual start.................................................................................................................................................9
6.2.2 Automatic start .............................................................................................................................................10
6.3 Technical data ....................................................................................................................................................11
6.3.1 Timing specification.......................................................................................................................................11
6.3.2 Safety specification .......................................................................................................................................11
6.3.3 Safety parameters.........................................................................................................................................11
6.3.4 Power supply................................................................................................................................................11
6.3.5 Inputs ..........................................................................................................................................................12
6.3.6 Outputs .......................................................................................................................................................12
6.3.7 Compatibility and conformity .........................................................................................................................12
6.3.8 Environmental...............................................................................................................................................13
6.4 Function description ............................................................................................................................................13
6.4.1 Outputs function ...........................................................................................................................................13
6.5 Application ........................................................................................................................................................14
7. SMX20 ..................................................................................................................................................16
7.1 Terminal layout ...................................................................................................................................................16
7.2 Operating modes................................................................................................................................................16
7.2.1 Manual start.................................................................................................................................................16
7.2.2 Automatic start .............................................................................................................................................17
7.2.3 Monitored manual start .................................................................................................................................17
7.3 Technical data ....................................................................................................................................................18
7.3.1 Timing specification.......................................................................................................................................18
7.3.2 Safety specification .......................................................................................................................................18
7.3.3 Safety parameters.........................................................................................................................................18
7.3.4 Power supply................................................................................................................................................18
7.3.5 Inputs ..........................................................................................................................................................19
7.3.6 Outputs .......................................................................................................................................................19
7.3.7 Compatibility and conformity .........................................................................................................................19
7.3.8 Environmental...............................................................................................................................................20
7.4 Function description ............................................................................................................................................20
7.4.1 Outputs function ...........................................................................................................................................20
7.5 Application ........................................................................................................................................................21
8. LED information .....................................................................................................................................23
9 Total current ΣIth² .................................................................................................................................24

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Rev. 1 | 03/2021 | SMXL20 / SMX20 Lift Levelling Module | © 2021 | CARLO GAVAZZI Industri A/S
SMXL20 / SMX20 - Original instruction manual
Ownership
Copyright © 2021, Carlo Gavazzi Industri A/S. All rights reserved in all countries.
CARLO GAVAZZI reserves the right to modify or make improvements to this document without advance notice.
Safety messages
The following symbols are used in this document to indicate warning concerning the user and/or the safety device:
Service and warranty
In the event of malfunction or requests for information please contact the CARLO GAVAZZI branch or distributor in your
country.
Danger! a potentially risky situation which could lead to death or serious physical injury.
Warning: indicates actions that if not observed may lead to damage to the device.
Attention: only CARLO GAVAZZI technical service personnel are authorized to open the safety device.
General information
Information: This manual should be consulted for all situations related to installation and use. It must be
kept in good condition and in a clean location accessible to all operators.
Maintenance and repairs
The device contains no parts that require maintenance.
In case of failure, do not open the device; the device must be sent to CARLO GAVAZZI branch or distributor.

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1. Introduction
Validity of documentation
This documentation is valid only for SMXL20 and SMX20 lift levelling modules and until new documentation is published.
This instruction manual describes the function, operation and installation of the product.
It is the user responsibility to decide if the module is correctly suited to the application
Description
The SMXL20 module and SMX20 module are compliant with international standards, designed to provide the most
comprehensive protection for equipment and personnel.
All rights of this document are reserved by Carlo Gavazzi Industri A/S.
How to use the documentation
This user manual must be read and completely understood by personnel dealing with all the uses of the modules prior to
carrying out any operation involving the module.
Please keep this document for future reference.
All the operations described in this manual must be carried out exclusively by specialized personnel, carefully following
all the instructions given.
Use of the product
The modules provide a safety-related interruption of a safety circuit.
The lift modules are compliant with the requirements of EN 81-20 and EN 81-50 and may be used in applications with:
• Safety magnetic sensors
• Safety magnetic switches
• Safety limit switches

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Rev. 1 | 03/2021 | SMXL20 / SMX20 Lift Levelling Module | © 2021 | CARLO GAVAZZI Industri A/S
2. Safety
2.2 Functional safety
Installation of the module is the sole responsibility of the installer or the user.
The device must be installed in accordance with the specific risk analysis of the application and all the applicable
standards.
Carlo Gavazzi is not responsible for these operations or for any risks in connection with them. Reference should be made
to the manual and to the relative product and/or application standards to ensure correct use of any devices connected to
the module within the specific application.
The ambient temperature where the system is installed must be compatible with the operating temperature parameters
stated on the product label and in the specifications.
2.1 Lift Safety Standards
In 2014 The European Committee for Standardization released two new safety standards for the construction of lifts and
for the testing of lift components. Both new standards applied to both passenger and goods lifts.
EN 81-20 defines the technical requirements for the construction of lifts.
EN 81-50 defines design rules, calculations and tests for lift components.
The modules are compliant with these Standards (EN 81-20 and EN 81-50).

6Rev. 1 | 03/2021 | SMXL20 / SMX20 Lift Levelling Module | © 2021 | CARLO GAVAZZI Industri A/S
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3. Installation and environmental conditions
Warning:
Avoid installation during thunderstorms.
Danger!
If the safety module is tampered, it can no longer ensure the safety of the operator and the warranty is void.
Information:
Use the notch on the rear of the unit to attach it to a DIN rail.
Ensure the unit is mounted securely on a DIN rail (35 mm) by using a fixing element (e.g. retaining bracket
or an end angle).
Information:
Do not dispose of the packaging in the environment.
Information:
The module must only be used within an ambient temperature range of -25 ÷ +60°C (-13 ÷ +140°F); UL:
+40°C (+104°F), away from any condensation or conducting fluids. To avoid possible interference, keep
the connecting conductors separate from the power conductors.
At installation and wiring of the device, ensure to use appropriate cables, conduits and
wiring layouts in order to prevent short circuits on the safety input signals

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Rev. 1 | 03/2021 | SMXL20 / SMX20 Lift Levelling Module | © 2021 | CARLO GAVAZZI Industri A/S
4.1 Power supply
4.2 Wiring
4. Wiring
24Vdc ± 10%; 24Vac -15%/+10%, 50÷60 Hz, Class 2, overvoltage category III.
1Warning:
Switch power supply OFF before wiring the device
2Warning: At installation and wiring of the device, ensure to use appropriate cables, conduits and wiring
layouts in order to prevent short circuits on the safety input signals
3To prevent contact welding, a fuse should be connected on the output contacts. Sufficient fuse protection must be provided on all output contacts with capacitive and inductive
loads. Ensure the wiring and EMC requirements of IEC 60204-1 are met.
4Information: It is good practice to separate the power supply of the control unit from that of other electrical
devices (e.g. frequency drives, electric motors, inverters) or other sources of disturbance.
5Information:
Use conductors with section: 0,2 - 2,5 mm² (24 - 14 AWG)
6Do not exceed the electrical ratings.
The safety modules are equipped with pluggable terminal blocks for easy wiring and devices exchange.
Procedure:
• Switch power supply OFF before wiring the device
• Insert the screwdriver in the recess of the terminal block and lift it to remove it. Do not remove the terminals blocks by
pulling the cables!
• Once the wiring of the terminal block is completed, insert the terminal block into the respective position
The plug-in terminal blocks are coded, so to prevent inserting the terminal blocks in the wrong position.
12

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5. Devices
The modules are used for floor levelling and relevelling of lift cabin, according to the 2014/33/EU Lift Directive, in lift
applications.
SMXL20 SMX20
NO safety outputs 2 2
Input type 2 NO, 3-wires with 1 common terminal 2 NO, 4-wires
5.1 Dimensions
17.5mm
[0,69”]
115.8mm [4,56”]
121.1mm [4,77”]
107mm [4,2”]
120.2mm [4,73”]

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Rev. 1 | 03/2021 | SMXL20 / SMX20 Lift Levelling Module | © 2021 | CARLO GAVAZZI Industri A/S
6. SMXL20
6.2 Operating modes
6.2.1 Manual start
X3 X2 X1
Start A
The start button is connected between X1 and X2.
The safety inputs 2 and 5 are operated:
• contact closed between 2 and 6
• contact closed between 5 and 6
The start button is pressed and the safety outputs switch ON
BThe opening of at least one safety input contact forces
immediately the safety outputs to the open state
CA new operating cycle is possible only after releasing both
input contacts and then operating them again
Reset / Start
Input ch 1
Input ch 2
Safety output
Ts
∞
Ta
<160ms
Tr
<20ms
Ts Ta Tr Ts Ta Tr
X1-X2: manual start / automatic start
2-6: channel 1 NO input
5-6: channel 2 NO input
1: power supply 24 Vdc (+)/Vac(~)
6: power supply 24 Vdc (-)/Vac(~)
3-4: NO safety output
7-8: NO safety output
6.1 Terminal layout

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6.2.2 Automatic start
X3
X1
X2
A
Connection between X1 and X2.
The safety inputs 2 and 5 are operated:
• contact closed between 2 and 6
• contact closed between 5 and 6
The safety outputs switch ON
BThe opening of at least one safety input contact forces
immediately the safety outputs to the open state
CA new operating cycle is possible only after releasing both
input contacts and then operating them again
Reset / Start
Input ch 1
Input ch 2
Safety output
Ts
∞Ta
<160ms
Tr
<20ms
Ts Ta Tr Ts Ta Tr

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Rev. 1 | 03/2021 | SMXL20 / SMX20 Lift Levelling Module | © 2021 | CARLO GAVAZZI Industri A/S
Warning:
EN 81-20 defines the technical requirements for lift construction.
EN 81-50 provides the framework for design and testing of lift components
6.3.2 Safety specification
Safety outputs 3-4 and 7-8
Safe state of outputs Open
Safety inputs 2-6 and 5-6
Safe state of inputs Open
Safety function
1. The release of either one or both safety inputs will release the safety
outputs.
2. The re-activation of the safety outputs is only possible after the release
of both safety inputs.
6.3 Technical data
6.3.1 Timing specification
Activation time Ta < 160ms
Release time Tr Double channel mode: < 20ms
Simultaneity Ts Infinite
6.3.4 Power supply
Power supply
24 Vdc ±10%, 2 W, Class 2
24 Vac -15/+10% 50÷60 Hz, 4.5 VA, Class 2
Overvoltage category III
Short circuit protection internal PTC
Rated insulation voltage 4 kV
6.3.3 Safety parameters
DIN EN 81-20 Certified
DIN EN 81-50 Certified
MTTFD[a] 420,8
PFHD[1/h] 1,85 E-10
DCavg 99%
ß5,00 E-02
ßD2,00 E-02

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EN
6.3.5 Inputs
Number of safety channels 2
Safety inputs (contact inputs) 2-6 and 5-6
Loop resistance Max. 1 kΩ
Input current Typical 2-5 mA
6.3.6 Outputs
Number of NO safety outputs 2
Type Voltage free contact output, relays with forcibly guided contacts
Max current rating - single output: @ 60°C (140°F) operating temperature:
EN60947-5-1 AC 1: 250V / 6A / 2000 VA - AC 15: 230V / 3A
DC 1: 24V / 6A - DC 13: 24V / 2.5A / 0.1 Hz
UL508 Pilot duty: B300 / R300
Max. total current ΣIth²: Spacing between modules ≥100mm: 72A² @40°C (104°F) ambient
temperature
Modules mounted stacked: 26A² @25°C (77°F) ambient temperature
Please refer to the derating curves in chapter 7
EN60947-5-1
UL508 Pilot duty: B300 / R300
Mechanical life > 107 operations
Electrical life AC1 (360 s/h) ~ 105 operations
6.3.7 Compatibility and conformity
Low Voltage Directive 2014/35/EU
EN 60947-5-1 Low-voltage switchgear and controlgear - Control circuit devices and
switching elements - Electromechanical control circuit devices
EMC Directive 2014/30/EU
EN 60947-5-1 Low-voltage switchgear and controlgear - Control circuit devices and
switching elements - Electromechanical control circuit devices
Lift Directive 2014/33/EU EU type examined by TÜV - Cert. no. 44 208 15058309
EN 81-20 Safety rules for the construction and installation of lifts.
Part 20: passenger and goods passenger lifts
EN 81-50 Safety rules for the construction and installation of lifts. Part 50: design rules, calculations, examinations and tests of lift
components
EN 12015 Electromagnetic compatibility. Product family standard for lifts,
escalators and passenger. Emission
EN 12016 Electromagnetic compatibility. Product family standard for lifts,
escalators and passenger. Immunity
Approvals

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Rev. 1 | 03/2021 | SMXL20 / SMX20 Lift Levelling Module | © 2021 | CARLO GAVAZZI Industri A/S
Not only must the output be safe, but also the complete wiring and surroundings. So wiring similar to the following has
to be done:
6.4.1 Outputs function
AThe NO safety outputs switch on (contact closes) when the
safety inputs are active and the start/reset is pressed.
BIn case of intervention of the safety inputs, the NO safety
outputs are switched off
CIf the power supply fails, the NO safety outputs are switched
off
6.4 Function description
Re-Levelling
sensors
Lift
controller
K1
N
Drive
Safety
circuit of cabin
landing and
cabin doors
L
Lift controller
N
Sensor 1
Sensor 2
Pwr 24V (-/~)
6
1
X1 X2
3
4
7
8
L
Pwr 24V (+/~)
Start
2 5
6.3.8 Environmental
Protection grade IP40 on frontal part of the housing, IP20 on the terminals.
Pollution degree 3
Operating Temperature -25 ÷ +60°C (-13 ÷ 140°F), UL: +40°C (104°F);
(tested @ temp 65°C (149 °F) as per lift norm)
Storage Temperature -30 ÷ +70°C (-22 ÷ 158°F)
Ambient humidity range R.H. ≤95% non condensing

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EN
The SMXL20 is designed to be employed in lift plants for floor levelling and relevelling of the cabin, according to the
requirements of EN 81-20 and EN 81-50 Standards, and according to the 2014/33/EU Lift Directive.
Re-Levelling
sensors
Lift
controller
K1
N
Drive
Safety
circuit of cabin
landing and
cabin doors
L
Lift controller
N
Sensor 1
Sensor 2
Pwr 24V (-/~)
6
1
X1 X2
3
4
7
8
L
Pwr 24V (+/~)
Start
2 5
Lift levelling with magnetic sensors
A
The module monitors the two re-levelling sensors and when the
cabin is in the re-levelling zone, it enables the safety outputs.
One safety output must be connected to bypass the circuit
that monitors the cabin landing and cabin doors, when the lift
cabin is inside the re-levelling zone; further to the landing and
re-levelling of the cabin at the floor, the safety module detects
eventual faults and the lift controller will stop the lift.
B The inputs 2, 5 are connected to the re-levelling zone sensors
6.5 Application

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Rev. 1 | 03/2021 | SMXL20 / SMX20 Lift Levelling Module | © 2021 | CARLO GAVAZZI Industri A/S
Information:
Lift car levelling safety module, designed according to Lift Directive 2014/33/EU and to safety circuit
requirements of EN 81-20, EN 81-50 Standards.
Information:
EN 81-20: Safety rules for the construction and installation of lifts. Part 20: passenger and goods/passenger
lifts.
EN 81-50: Safety rules for the construction and installation of lifts. Part 50: design rules, calculations,
examinations and tests of lift components.
Lift
controller
Drive
Safety
circuit of cabin
landing and
cabin doors
Lift controller
N
Door zone sensor
Tachometer sensor
Pwr 24V (-/~)
6
1
X1 X2
3
4
7
8
Pwr 24V (+/~)
Start
2 5
L L
N
Lift levelling with door zone and tachometer
sensors
A
Upon receiving the signal from the door zone sensor and the
tachometer sensors, the module enables the safety outputs.
One safety output must be connected to bypass the circuit
that monitors the cabin landing and cabin doors, when the lift
cabin is inside the re-levelling zone; further to the landing and
re-levelling of the cabin at the floor, the safety module detects
eventual faults and the lift controller will stop the lift.
B
The inputs 2, 5 are connected to the door zone and tachometer
sensors

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7.2 Operating modes
7.2.1 Manual start
X3 X2 X1
Start A
The start button is connected between X1 and X2.
The safety inputs S12 and S22 are operated:
• contact closed between S11 and S12
• contact closed between S21 and S22
The start button is pressed and the safety outputs switch ON
BThe opening of at least one safety input contact forces
immediately the safety outputs to the open state
CA new operating cycle is possible only after releasing both
input contacts and then operating them again
Reset / Start
Input ch 1
Input ch 2
Safety output
Ts
∞
Ta
<160ms
Tr
<20ms
Ts Ta Tr Ts Ta Tr
The SMX20 is used for floor levelling and relevelling of lift cabin, according to the 2014/33/EU Lift Directive, in lift
applications.
7. SMX20
X1-X2: manual start / automatic start
X1-X3: monitored manual start
S11-S12: channel 1 NO input
S21-S22: channel 2 NO input
A1: power supply 24 Vdc (+)/Vac(~)
A2: power supply 24 Vdc (-)/Vac(~)
13-14: NO safety output
23-24: NO safety output
7.1 Terminal layout

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Rev. 1 | 03/2021 | SMXL20 / SMX20 Lift Levelling Module | © 2021 | CARLO GAVAZZI Industri A/S
7.2.2 Automatic start
X3
X1
X2
A
Connection between X1 and X2.
The safety inputs S12 and S22 are operated:
• contact closed between S11 and S12
• contact closed between S21 and S22
The safety outputs switch ON
BThe opening of at least one safety input contact forces
immediately the safety outputs to the open state
CA new operating cycle is possible only after releasing both
input contacts and then operating them again
Reset / Start
Input ch 1
Input ch 2
Safety output
Ts
∞Ta
<160ms
Tr
<20ms
Ts Ta Tr Ts Ta Tr
7.2.3 Monitored manual start
X3 X1 X2
Start A
The start button is connected between X1 and X3.
The safety inputs S12 and S22 are operated:
• contact closed between S11 and S12
• contact closed between S21 and S22
The start button can be pressed at least 500ms after the
safety inputs are operated, to enable the safety outputs to
the active state
BThe opening of at least one safety input contact forces
immediately the safety outputs to the open state
CA new operating cycle is possible only after releasing both
input contacts and then operating them again
Reset / Start
Input ch 1
Input ch 2
Safety output
Ts
∞
Td
> 500ms
Ta
<160ms
Tr
<20ms
Ts Td
< 500ms
Ts

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Warning:
EN 81-20 defines the technical requirements for lift construction.
EN 81-50 provides the framework for design and testing of lift components
7.3.2 Safety specification
Safety outputs 13-14 and 23-24
Safe state of outputs Open
Safety inputs S12-S11 and S22-S21
Safe state of inputs Open
Safety function
1. The release of either one or both safety inputs will release the safety
outputs.
2. The re-activation of the safety outputs is only possible after the release
of both safety inputs.
7.3 Technical data
7.3.1 Timing specification
Activation time Ta < 160ms
Release time Tr Double channel mode: < 20ms
Single channel mode: < 160ms
Simultaneity Ts Infinite
Monitored manual start delay Td > 500ms
7.3.4 Power supply
Power supply
24 Vdc ±10%, 2 W, Class 2
24 Vac -15/+10% 50÷60 Hz, 4.5 VA, Class 2
Overvoltage category III
Short circuit protection internal PTC
Rated insulation voltage 4 kV
7.3.3 Safety parameters
DIN EN 81-20 Certified
DIN EN 81-50 Certified
MTTFD[a] 420,8
PFHD[1/h] 1,85 E-10
DCavg 99%
ß5,00 E-02
ßD2,00 E-02

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Rev. 1 | 03/2021 | SMXL20 / SMX20 Lift Levelling Module | © 2021 | CARLO GAVAZZI Industri A/S
7.3.5 Inputs
Number of safety channels 2
Safety inputs (contact inputs) S11-S12 and S21-S22
Loop resistance Max. 1 kΩ
Input current Typical 5 mA
7.3.6 Outputs
Number of NO safety outputs 2
Type Voltage free contact output, relays with forcibly guided contacts
Max current rating - single output: @ 60°C (140°F) operating temperature:
EN60947-5-1 AC 1: 250V / 6A / 2000 VA - AC 15: 230V / 3A
DC 1: 24V / 6A - DC 13: 24V / 2.5A / 0.1 Hz
UL508 Pilot duty: B300 / R300
Max. total current ΣIth²: Spacing between modules ≥100mm: 72A² @40°C (104°F) ambient
temperature
Modules mounted stacked: 26A² @25°C (77°F) ambient temperature
Please refer to the derating curves in chapter 12
EN60947-5-1
UL508 Pilot duty: B300 / R300
Mechanical life > 107 operations
Electrical life AC1 (360 s/h) ~ 105 operations
7.3.7 Compatibility and conformity
Low Voltage Directive 2014/35/EU
EN 60947-5-1 Low-voltage switchgear and controlgear - Control circuit devices and
switching elements - Electromechanical control circuit devices
EMC Directive 2014/30/EU
EN 60947-5-1 Low-voltage switchgear and controlgear - Control circuit devices and
switching elements - Electromechanical control circuit devices
Lift Directive 2014/33/EU EU type examined by TÜV - Cert. no. 44 208 15058309
EN 81-20 Safety rules for the construction and installation of lifts.
Part 20: passenger and goods passenger lifts
EN 81-50 Safety rules for the construction and installation of lifts. Part 50: design rules, calculations, examinations and tests of lift
components
EN 12015 Electromagnetic compatibility. Product family standard for lifts,
escalators and passenger. Emission
EN 12016 Electromagnetic compatibility. Product family standard for lifts,
escalators and passenger. Immunity
Approvals

20 Rev. 1 | 03/2021 | SMXL20 / SMX20 Lift Levelling Module | © 2021 | CARLO GAVAZZI Industri A/S
EN
Not only must the output be safe, but also the complete wiring and surroundings. So wiring similar to the following has
to be done:
7.4.1 Outputs function
AThe NO safety outputs switch on (contact closes) when the
safety inputs are active and the start/reset is pressed.
BIn case of intervention of the safety inputs, the NO safety
outputs are switched off
CIf the power supply fails, the NO safety outputs are switched
off
7.4 Function description
Re-Levelling
sensors
Lift
controller
K1
N
Drive
Safety
circuit of cabin
landing and
cabin doors
L
Lift controller
N
Sensor 1
Sensor 2
Pwr 24V (+/~)
A1
A2
X1 X2
S11 S12 S21 S22
13
14
23
24
L
Pwr 24V (-/~)
Start
X3
7.3.8 Environmental
Protection grade IP40 on frontal part of the housing, IP20 on the terminals.
Pollution degree 3
Operating Temperature -25 ÷ +60°C (-13 ÷ 140°F), UL: +40°C (104°F);
(tested @ temp 65°C (149 °F) as per lift norm)
Storage Temperature -30 ÷ +70°C (-22 ÷ 158°F)
Ambient humidity range R.H. ≤95% non condensing