ZIEHL-ABEGG ZAsbc4 User manual

R-TBA20_01-GB 2021/33 Index 002 Part.-No. 00163475-GB
ZA sbc4
Electronic brake control
Original operating instructions
Store for future use!

Content
1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Structure of the operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Target group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Exclusion of liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Copyright . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Pictographs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4 Product safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.5 Requirements placed on the personnel / due diligence . . . . . . . . . . . . . . . . . . . . . . . . 6
2.6 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.7 Working on the device / the brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.8 Modifications / interventions in the device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.9 Operator’s obligation of diligence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.10 Employment of external personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Product overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Name plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Service & maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4 Disposal & recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Activation of motor brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 Brake control monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.3 Principle circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3.1 ZAsbc4C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3.2 ZAsbc4B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.4 Control of “Safe switch-off (STO)” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.5 Use of the ZAsbc4 with motor contactors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.6 Sequence of signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.6.1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.6.2 Description for use with frequency inverters type ZAdyn with STO function . . . . . . . 15
4.6.3 Time monitoring of the control signals (X-EN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.7 Reduction in output voltage (overexcitation) / brake circuit 2 delay . . . . . . . . . . . . . . . 16
5 Mechanical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 ZAsbc4C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1.1 General notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1.2 Assembly on the ZAdyn4C 011-032 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1.3 Assembly on the ZAdyn4C 040-074 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1.4 Dimensions / minimum clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.2 ZAsbc4B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2.1 General notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2.2 Dimension drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6 Electrical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.1 EMC-compatible installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.2 Terminal positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.3 Strain relief for ZAsbc4C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.4 Protective earth connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.4.1 ZAsbc4C protective earth connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.4.2 ZAsbc4B PE conductor connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
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6.5 Mains connection (X-SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.6 Connection of motor brakes (X-BA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.7 Test overvoltage protection/error acknowledgement (X-OV) . . . . . . . . . . . . . . . . . . . . . 30
6.8 Brake control inputs (X-EN)/Safe Torque Off relay (X-SC) . . . . . . . . . . . . . . . . . . . . . . 31
6.8.1 ZAsbc4 in use with ZAdyn frequency inverters . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.8.2 ZAsbc4B with frequency inverters from other manufacturers . . . . . . . . . . . . . . . . . 32
6.8.3 Use of the ZAsbc4 with motor contactors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.9 Brake control monitoring output (X-CM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.10 Safe Torque Off control (X-STO) outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.10.1 ZAsbc4 with ZAdyn frequency inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.10.2 ZAsbc4B with frequency inverters from other manufacturers . . . . . . . . . . . . . . . . . 34
6.11 Feedback output (X-BM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.11.1 ZAsbc4 with ZAdyn frequency inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.11.2 ZAsbc4B with frequency inverters from other manufacturers/elevator control system . 35
6.12 Circuit suggestion, ZAsbc4C and ZAdyn4C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.13 Circuit suggestions, ZAsbc4B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7 Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.1 DIP switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.1.1 Position of the DIP switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.1.2 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.2 Parameterisation of the ZAdyn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
7.3 Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.4 Safety function test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.4.1 Test procedure with frequency inverters type ZAdyn4C and ZAdynpro . . . . . . . . . . 46
7.4.2 Test procedure with frequency inverters type ZAdyn4B and frequency inverters from
other manufacturers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.5 Brake test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.6 Emergency rescue / UPS operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8 Error diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8.1 LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8.2 Error response and acknowledgement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.3 Error list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
9 Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.1 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.2 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.3 Part no. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.4 EU declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
9.5 Certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
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1 General information
Compliance with the following instructions is mandatory to ensure the functionality and safety of the
product. If the following instructions given especially but not limited for general safety, transport,
storage, mounting, operating conditions, start-up, maintenance, repair, cleaning and disposal / recy-
cling are not observed, the product may not operate safely and may cause a hazard to the life and
limb of users and third parties.
Deviations from the following requirements may therefore lead both to the loss of the statutory material
defect liability rights and to the liability of the buyer for the product that has become unsafe due to the
deviation from the specifications.
1.1 Structure of the operating instructions
These operating instructions are designed to ensure safe working on and with the ZAsbc4 electronic
brake control. The document contains safety instructions that must be complied with as well as
information that is essential for fault-free operation of the device.
Keep these operating instructions together with the device. It must be ensured that all persons that
are to work on the device can refer to the operating instructions at any time. In addition to the
operating instructions, directives in the sense of the ordinance on industrial safety and health and the
work equipment ordinance are also to be provided.
Keep the operating instructions for continued use. They must be passed-on to all successive owners,
users and final customers.
1.2 Target group
The operating instructions address persons entrusted with planning, installation, start-up, mainte-
nance and servicing, who have the corresponding qualifications and skills for their job.
1.3 Exclusion of liability
Concurrence between the contents of these operating instructions and the described hardware and
software in the device has been examined.
It is still possible that non-compliances exist; no guarantee is assumed for complete conformity. The
contents of this manual are put through periodic reviews. Necessary modifications are incorporated
into the next version.
ZIEHL-ABEGG SEis not liable for damage due to misuse, incorrect use, improper use or as a
consequence of unauthorized repairs or modifications.
1.4 Copyright
These operating instructions contain copyright protected information. The operating instructions may
be neither completely nor partially photocopied, reproduced, translated or put on data medium without
previous explicit consent from ZIEHL-ABEGG SE. Infringements are liable for damages.
All rights reserved, including those that arise through patent issue or registration on a utility model.
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2 Safety instructions
2.1 General
This chapter contains instructions to prevent personal injury and property damage.
These instructions do not lay claim to completeness. In case of questions and problems, please
consult our company technicians.
2.2 Intended use
The ZAsbc4 electronic brake control is a system component designed to provide contactor-less
control of electromechanical motor brakes in passenger and goods elevator applications.
The electronic brake control is available in two variants:
ZAsbc4C:
Mounting on frequency inverter ZAdyn4C
ZAsbc4B:
Mounting in the control cabinet
The devices are not designed for any other use than those listed here – this is considered improper
use.
Reading these operating instructions and complying with all the information they contain – especially
the safety instructions – is considered part of intended use. Furthermore, it also includes carrying out
all the inspection work at the prescribed intervals. The operator of the ZAsbc4C or the ZAsbc4B, not
the manufacturer, is responsible for all personal injury and damage to property resulting from improper
use!!
2.3 Pictographs
Safety instructions are highlighted with warning triangles and are depicted according to the degree of
hazard as follows.
Danger!
General hazardous area. Death or severe injury or significant property damage can occur if the
corresponding precautions are not taken!
Attention!
Risk of moderate or minor injury if the corresponding precautions are not taken!
CAUTION!
Attention!
Material damage is possible if the corresponding precautions are not taken!
Danger!
Danger by dangerous, electric voltage! Death or severe injury can occur if the corresponding
precautions are not taken!
Information
Important information and advice for user
2.4 Product safety
The device conforms to the state of the art at the time of delivery and is fundamentally considered to
be reliable. The device and its accessories must only be used in a flawless condition and installed and
operated with compliance to the operating instructions.
Exceeding the limits stated in the “Enclosure / technical data” chapter can lead to a defect in the
device.
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2.5 Requirements placed on the personnel / due diligence
Persons entrusted with the planning, installation, commissioning and maintenance and servicing in
connection with the device must have the corresponding qualifications and skills for these jobs. Based
on their training, knowledge and experience as well as knowledge of the relevant standards, they
must be able to judge the work transferred to them and be able to recognize possible hazards.
In addition, they must be knowledgeable about the safety regulations, EU directives, rules for the
prevention of accidents and the corresponding national as well as regional and in-house regulations.
Personnel to be trained or instructed and apprentices are only permitted to work on the device under
the supervision of an experienced person. This also applies to personnel undergoing general training.
Comply with the legal minimum age.
2.6 Commissioning
Danger!
During commissioning, unexpected and hazardous conditions can arise in the entire system due to
incorrect settings, defective components or incorrect electrical connections.
During the commissioning following has to be observed:
•Remove all persons and objects from the hazardous area.
•The EMERGENCY-OFF function activation must be operational.
•The mechanical safety brake must be installed and in working order.
•Commissioning is only permitted subject to compliance with the EMC-Directive 2014/30/EU.
2.7 Working on the device / the brakes
Before working on previously installed devices, separate them from the mains and secure them
against reconnection.
Danger!
Even in the case of an interrupted safety circuit or inactive inputs, the X-BA connection is not
electrically isolated from the mains. Before working on previously installed devices, disconnect them
from the mains and secure them against reconnection.
Danger!
It is generally forbidden to carry out work on electrical live parts. Protection class of the device when
open is IP00! It is possible to touch hazardous voltages directly.
2.8 Modifications / interventions in the device
For reasons of safety, no unauthorized interventions or modifications may be made on the device.
All planned modifications must be authorized by the manufacturer in writing.
Use only genuine spare parts / genuine wearing parts / genuine accessories from the
ZIEHL-ABEGG SE.These parts were specifically designed for the device. There is no guarantee that
parts from non-original sources are designed and manufactured in correspondence with load and
safety requirements.
Parts and special equipment not supplied by the ZIEHL-ABEGG SE are not approved for use.
Also, the internal safeguards may only be replaced by ZIEHL-ABEGG SE employees.
2.9 Operator’s obligation of diligence
The device has been designed and constructed with consideration of a hazard analysis and after
carefully selecting the harmonized standards to be complied with as well as additional technical
specifications. It thus complies with the state-of-the art and ensures the highest degree of safety.
However, this safety can only be achieved in practical operation when all the necessary measures are
taken. The machine operator therefore has a duty of care to ensure that these measures are planned
and to supervise their execution.
In particular, the operator must ensure that
•the device is only used as intended (cf. the "Product overview" Chapter concerning this),
•the installation is operated solely in a flawless, functional condition and that especially the safety
devices are periodically checked for their properly functioning condition,
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•the required personal safety gear is available to and used by the operating, maintenance and repair
personnel,
•the operating instructions are always readily available at the location where the frequency inverter
is being used, are complete and are in legible condition,
•only sufficiently qualified and authorized personnel operate, maintain and repair the device,
•these staff receive regular instruction in all relevant occupational safety and environmental protec-
tion issues, are knowledgeable about the operating instructions and, especially, are familiar with the
safety instructions contained therein,
•all safety and warning notices attached to the device are never removed and remain legible.
2.10 Employment of external personnel
Maintenance and service work are frequently carried out by external employees who often do not
recognize the specific situations and the thus resulting dangers.
These persons must be comprehensively informed about the hazards in their area of activity.
You must monitor their working methods in order to intervene in good time if necessary.
3 Product overview
3.1 Name plate
ZAsbc4C ZAsbc4B
The name plate is located on the right-hand side of the
ZAsbc4C housing.
The name plate is located on the upper side surface of
the ZAsbc4B.
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1
2
3
45 6 7 8
9
10
11
Name plate using the ZAsbc4B 230 as an example
no. Designation
1 Part no.
2 Series number
3 Mains connection voltage
4 Series
5 Mains frequency
6 Rated output current
7 Duty cycle in the case of 30 s medium cycle
time
8 Type-examination certificate number
9 Identification number of the notified body
10 Protection rating
11 CE mark
3.2 Service & maintenance
•These jobs must be completed during the recurrent maintenance work:
–Check the device for dirt and clean if necessary.
–Check the connections and tighten screws if necessary.
•Safety-related functions must undergo regular testing. The tests are listed in detail in chapter
"Commissioning/safety function test".
3.3 Transport
•The device is packed ex factory to suit the transport method previously agreed.
•The device may only be transported in the original packaging.
•Avoid shocks and impacts to the device during the transport.
3.4 Disposal & recycling
Disposal must be carried out professionally and environmentally friendly in accordance with the legal
stipulations.
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4 Functional description
4.1 Activation of motor brakes
The ZAsbc4 electronic brake control is used for safety-related switching of redundant electromechan-
ical brakes in passenger and goods elevator applications. The contactors normally used for switching
the motor brakes can be replaced by the ZAsbc4. The ZAsbc4 is designed as a safety circuit and
complies with EN 81-20 Section 5.9.2.2.2.3 a) 2).
"Brake control" functional circuit diagram
ZAsbc4
U
U
X-EN
S2
S1B (2)
S1A (3)
OV_1 (1)
OV_2 (2)
X-OV
X-SP
L (1)
N (2)
PE (3)
CM_
O1 (1)
CM_
O2 (2)
X-CM
X-BA
BA1+(1)
BA1-(2)
BA2+
(3)
BA2-
(4)
4
(1)
3
AC
DC
AC
DC
S2
S1A
S1B
F
5
1
2
X-SC
SC_N (3)
Brake control functional circuit diagram
1 Brake circuit 1
2 Brake circuit 2
3 Brake control monitoring
4 Overvoltage protection
5 Fusing (to be replaced only by ZIEHL-ABEGG SE employees)
At the connection X-EN the brake control has three inputs (S1A, S1B, S2). During operation, the
inputs are activated by contacts on the frequency inverter or the elevator control system, which is
supplied by the end of the safety chain. At the output for the connection of the motor brakes (X-BA
connection), two brake circuits can be connected.
Switching on/opening the brakes:
•Brake circuit 1 is energized if at input S1A and input S2 a "1" signal (safety chain voltage) is
applied.
•Brake circuit 2 is energized if at input S1B and input S2 a "1" signal (safety chain voltage) is
applied.
Switching off/closing the brakes:
•Brake circuit 1 is closed if at input S1A and/or input S2 a "0" signal (0 V) is applied.
•Brake circuit 2 is closed if at input S1B and/or input S2 a "0" signal (0 V) is applied.
Original operating instructions
ZAsbc4 Functional description
R-TBA20_01-GB 2021/33 Index 002 Part.-No. 00163475-GB
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Input
S1A
Input
S2
Brake circuit 1
(BA1+, BA1-)
0 0 Locked
1 0 Locked
0 1 Locked
1 1 energized
Input
S1B
Input
S2
Brake circuit 2
(BA2+, BA2-)
0 0 Locked
1 0 Locked
0 1 Locked
1 1 energized
Danger!
Impermissible use of the ZAsbc4
Risk of death, severe injury and/or significant material damage.
"Only use the ZAsbc4 in accordance with EN81-20 for drives with two independently operating,
redundant brake circuits. The failure of one of the two brake circuits alone must not result in an
unsafe condition. Even if one brake circuit fails, the second brake circuit must retain sufficient
braking action to delay, stop and hold the elevator car.
"The two redundant brake circuits must each be connected to an output on the ZAsbc4.
Operational switching off of the brakes must be carried out using the S1A, S1B inputs with a time
delay before S2. In this way, the energy stored in the brake circuit inductances is reduced by a free-
wheeling circuit. The brakes engage slowly and quietly. The time offset must be at least the maximum
switching time of the brakes (see “Functional description/Principle circuit diagram” and “Function
description/Sequence of signals” chapters). When used with frequency inverters of type ZAdyn, the
time offset can be generated by outputs with the functions RB and MB.
If the S2 input is switched off at the same time or before S1A, S1B, the energy stored in the brake
circuits is not reduced via a free-wheeling circuit. The brakes engage fast and loudly. This is only
permissible in the case of inspection runs, return runs and emergency stops.
CAUTION!
Attention!
Overload of components
Destruction of components
"Do not operationally switch off the brakes via the S2 input.
4.2 Brake control monitoring
The CM_O relay output at the X-CM connection shows the status of the switching elements controlled
via the inputs. The output must be monitored by the lift control system. In the following cases, the lift
control system must avoid a repeated start-up:
•Relay fails to be energized at the end of movement (closing of brakes: "0" signal at S1A and S1B
and S2).
•Relay is de-energized when at a standstill without applying a movement command (brakes closed:
"0" signal at S1A, S1B, S2).
•Relay is not de-energized at the start of movement (opening of brakes: “1” signal at S1A or S1B or
S2). Note: The response to the fault described can occur after completing the movement.
Original operating instructions
ZAsbc4 Functional description
R-TBA20_01-GB 2021/33 Index 002 Part.-No. 00163475-GB
10/64