Siemens SINAMICS MV Parts list manual

Function Manual
Edition
Medium voltage converters
Two-channel firing pulse inhibit
SINAMICS MV
www.siemens.com
07/2021

SINAMICS
Two-channel 󹪝ring pulse inhibit
Function Manual
07/2021
A5E51227986A
Introduction 1
Safety instructions 2
Description 3
Preparing for use 4
Operation 5
Wiring A

Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent damage
to property. The notices referring to your personal safety are highlighted in the manual by a safety alert symbol, notices
referring only to property damage have no safety alert symbol. These notices shown below are graded according to
the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will be
used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property
damage.
Quali󹪝ed Personnel
The product/system described in this documentation may be operated only by personnel quali󹪝ed for the speci󹪝c
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Quali󹪝ed personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended or
approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance
are required to ensure that the products operate safely and without any problems. The permissible ambient
conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identi󹪝ed by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication may
be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software described.
Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in this
publication is reviewed regularly and any necessary corrections are included in subsequent editions.
Siemens AG
Large Drives Applications
Vogelweiherstr. 1-15
90441 NÜRNBERG
GERMANY
Document order number: A5E51227986A
Ⓟ 08/2021 Subject to change
Copyright © Siemens AG 2021.
All rights reserved

Table of contents
1 Introduction ........................................................................................................................................... 5
1.1 About these instructions ...................................................................................................... 5
2 Safety instructions................................................................................................................................. 7
3 Description............................................................................................................................................. 9
3.1 Structure ............................................................................................................................. 9
3.2 Function features............................................................................................................... 11
3.3 Functions........................................................................................................................... 12
3.3.1 Switching sequences from the perspective of the system operator...................................... 12
3.3.1.1 Activating and deactivating the 󹪝ring pulse inhibit.............................................................. 13
3.3.1.2 Deactivating the 󹪝ring pulse inhibit and restarting.............................................................. 14
4 Preparing for use ................................................................................................................................. 15
4.1 Wiring for cable lengths exceeding 30 m ............................................................................ 15
5 Operation............................................................................................................................................. 17
A Wiring .................................................................................................................................................. 19
A.1 Wiring overview................................................................................................................. 19
A.2 Checking the wiring when the function is retro󹪝tted........................................................... 20
A.2.1 Wiring to the tripping device .............................................................................................. 20
A.2.2 Wiring to the PSAs in the power unit .................................................................................. 21
Two-channel 󹪝ring pulse inhibit
Function Manual, 07/2021, A5E51227986A 3

Table of contents
Two-channel 󹪝ring pulse inhibit
4Function Manual, 07/2021, A5E51227986A

Introduction 1
• The function is NOT a Safe Torque O󹪜 (STO) function.
• A risk analysis is not available.
• STO functionality can only be implemented on the system side in conjunction with additional
measures, and must be certi󹪝ed by a third party.
• At the time of activation, the system must be at a complete standstill.
1.1 About these instructions
• This documentation describes the two-channel 󹪝ring pulse inhibit (a 2-channel light on/light
o󹪜 function of the light emitting control).
• This documentation addresses the following persons:
– System integrators
– Commissioning engineers
– Service personnel of the SINAMICS medium voltage converter
Text format features
You can 󹪝nd the following text format features in these instructions:
1. Handling instructions are always formatted as a numbered list. Always perform the steps in
the order given.
• Lists are formatted as bulleted lists.
– Lists on the second level are hyphenated.
Note
The note provides you with additional information about the product itself, handling the product
- and the relevant documentation.
Two-channel 󹪝ring pulse inhibit
Function Manual, 07/2021, A5E51227986A 5

Introduction
1.1 About these instructions
Two-channel 󹪝ring pulse inhibit
6Function Manual, 07/2021, A5E51227986A

Safety instructions 2
Risk of death resulting from failure to observe the safety instructions and residual risks
If you fail to heed and comply with the safety instructions and residual risks in the associated
converter documentation, accidents can occur. This can result in severe injury or death.
• Observe the safety instructions in the converter documentation.
• Consider the residual risks in the risk assessment.
Danger due to insu󹪟cient training
Any operation and service involving the "Two-channel 󹪝ring pulse inhibit" function must be
performed by trained quali󹪝ed personnel only. The drive can start unexpectedly due to improper
operation of the function. This can result in death, serious injury or material damage.
• Carefully ensure that everyone operating or servicing the "Two-channel 󹪝ring pulse inhibit"
function are adequately trained before they use the function. Training must include studying
the function and its integration into the production process. Documenting the training.
Danger due to coast down of the motor
When the "Two-channel 󹪝ring pulse inhibit" function is activated while the machine is rotating,
then the motor coasts down if it has not yet come to a stop.
Incorrect use can result in death, serious injury or substantial material damage.
• Apply the appropriate protective measures to avoid danger to people resulting from the
motor coasting down after the power supply has been disconnected.
Danger of the motor jerking into motion from standstill
When certain faults occur in the Power Module, brief jerking of the motor into motion from
standstill cannot be ruled out. The simultaneous destruction (short-circuit or breakdown of
depletion layer) of 2 power thyristors in the converter may cause the drive to move brie󹪞y
depending on the number of poles that the motor has. The precondition for this brief drive
movement is that one power thyristor in the upper branch and one power thyristor o󹪜set in the
lower branch develops a short-circuit or breaks down the depletion layer. For rotary three-phase
motors, this alignment movement can be a maximum of 180° / number of pole pairs at the motor
shaft.
An alternating 󹪝eld is generated in the motor winding as a result of the double fault described
above where 2 power thyristors remain in the conducting state. However, this does not result in
a rotating 󹪝eld and continuous rotation.
The destruction of 2 power semiconductors can only occur when several power thyristors
simultaneously break down (depletion layer is broken down) or as a result of multiple
simultaneous faults in the control modules. Although these types of double faults can only occur
Two-channel 󹪝ring pulse inhibit
Function Manual, 07/2021, A5E51227986A 7

with a very low probability, the machine builder (OEM) must carefully check as to whether
additional measures are required. Incorrect handling when the motor suddenly moves can result
in death, serious injury or substantial material damage.
• Adopt suitable protective measures to ensure that personnel is not endangered by the motor
jerking into motion from standstill.
• Carefully ensure that everyone operating the "Two-channel 󹪝ring pulse inhibit" function are
adequately trained before they use the function. Training must include studying the function
and its integration into the production process. Documenting the training.
Danger due to the motor restarting
Drive systems, in which the energy supply to the motor is also possible via the load, e.g. marine
drives, conveyors, fans, etc., cannot be protected against restart using the "Two-channel 󹪝ring
pulse inhibit" function. Sudden and unexpected restarting of the motor can result in death,
serious injury or substantial material damage.
• Take appropriate countermeasures, such as mechanical braking.
Danger by not waiting for the principle-related delay time to elapse
Selecting the "Two-channel 󹪝ring pulse inhibit" function causes the 󹪝ring pulses to be inhibited.
Due to the inherent operating principle, the 󹪝ring pulses are inhibited after a short delay time.
The recommended delay time setting at the 3SK11 safety relay is 0.5 seconds.
Death and severe injury can occur if the delay time is not strictly observed.
• After externally activating the "Two-channel 󹪝ring pulse inhibit" function, always wait until
the set delay time has elapsed.
• For the upstream safety controls, take into account this delay time when releasing protective
doors or other protective equipment.
Danger due to high voltage
The drive is not disconnected from the line supply when activating the "Two-channel 󹪝ring pulse
inhibit" function. Dangerous voltages of over 1000 V are present on the motor and drive
converter. High voltages can cause death or serious injury if the safety rules are not observed or
if the equipment is handled incorrectly.
• Isolate the electrical equipment from the line supply at the main switch when it breaks down
or stops, or when it needs to be serviced, repaired or cleaned.
• Do not carry out any work on electrical connections without 󹪝rst applying all of the necessary
protective measures. Observe the 5 safety rules before undertaking work on the equipment.
Safety instructions
Two-channel 󹪝ring pulse inhibit
8Function Manual, 07/2021, A5E51227986A

Description 3
When the "Two-channel 󹪝ring pulse inhibit" function is selected, the following points apply:
• The optical pulse transmission to the PSA to control the 󹪝ring pulses on the thyristor gating
module is switched o󹪜.
• The Motor Module and the motor are not electrically isolated.
Note
Active loads
Using the function, drive systems with active loads cannot be protected against restarting
due to an external energy supply. Take into account this residual risk when designing your
machine and where necessary apply suitable countermeasures, mechanical brakes for
example.
3.1 Structure
The structure of the "Two-channel 󹪝ring pulse inhibit" function is shown in the following diagram
(‒)
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Figure 3-1 Overview of the main components
Two-channel 󹪝ring pulse inhibit
Function Manual, 07/2021, A5E51227986A 9

The components in detail
①A tripping device, e.g. mushroom pushbutton (not included in the delivery scope of the option).
As the actuator, a forced NC contact according to ISO 23850 and EN 60947-1 or a certi󹪝ed safety control F-
PLC can be used.
②Control voltage power supply (part of the basic device, not part of the option).
The power supply must conform to SafetyExtraLowVoltage certi󹪝cation with the requirements included in
it, as the PSA ground potential is at the ground potential of the converter housing. The components of the
two-channel 󹪝ring pulse inhibit are supplied with the same voltage.
③Siemens 3SK1122-2CB4x safety relay (included in the scope of delivery of the option)
Terminal Connection
A1 +
A2 -
IN1 Sensor channel 1
IN2 Sensor channel 2
PAR NO contact/NC contact evaluation
INS START pushbutton circuit
INF Feedback circuit
INK Cascade circuit / functional switching
T1 Test output 1 (for IN1, PAR)
T2 Test output 2 (for IN2, PAR)
Q1 Instantaneous safety-related output 1 (switching to P potential, 24 V DC)
Q2 Instantaneous safety-related output 2 (switching to P potential, 24 V DC)
Qt1 Delayed safety-related output 1 (switching to P potential, 24 V DC)
Qt2 Delayed safety-related output 2 (switching to P potential, 24 V DC)
Description
3.1 Structure
Two-channel 󹪝ring pulse inhibit
10 Function Manual, 07/2021, A5E51227986A

④Power Stack Adapter (part of the basic device, not part of the option)
The principle of the 󹪝ring pulse interruption (inhibit) has a two-channel structure. The power supply for the
diode light emitters and also the outputs of the diode light emitter drivers can be interrupted.
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⑤Converter control (part of the basic device, not part of the option)
The converter control comprises a SIMOTION D4x5 and SINAMICS CU320 - referred to the two-channel 󹪝ring
pulse inhibit, only plays a subordinate role. Even if these components are indispensable when it comes to
operating the converter, the function of the two-channel 󹪝ring pulse inhibit is an independent hardware
solution, without the necessity of having to use software components for the control. Having said that, the
control is integrated into the switching sequence and serves to additionally monitor the function.
Note
Firmware version
The evaluation of the 󹪝ring pulse inhibit feedback signals from the PSAs and the initiation of the
alarm according to function block diagram FBD 9845 are only available from 󹪝rmware SINAMICS
MV V5.2.4.1 and higher. The "SCOUT" SSP MV V5.2.4 software is also required.
3.2 Function features
After activation, the PSA modules to implement the "Two-channel 󹪝ring pulse inhibit" function
are incorporated by interrupting the 󹪝ber-optic cable transmission to the PSAs through two
channels.
Description
3.2 Function features
Two-channel 󹪝ring pulse inhibit
Function Manual, 07/2021, A5E51227986A 11

Standard monitoring mechanisms
Note
Note for system integrators
These standard monitoring mechanisms are implemented in the converter. Within the scope of
a system acceptance test, check and document the correct principle of operation in combination
with external components.
• a)
After a 󹪝ring pulse inhibit, the Control Unit activates the thyristor monitoring functions on
the PSAs via DRIVE-CLiQ communication. By evaluating the gate-cathode voltages, the
thyristor monitoring detects thyristors in the power unit that are in the conducting state (not
turned o󹪜). Conducting thyristors (not turned o󹪜) cause the line-side circuit breaker to be
immediately opened. The SIMOTION-CPU directly opens the circuit breaker via a digital
output of a TM15 module, which is physically coupled to the CU320-2 via a DRIVE-CLiQ
connection.
• b)
In addition, the current actual values that are received from the PSAs via the DRIVE-CLiQ
connection are monitored in the Control Unit. After a 󹪝ring pulse inhibit, if the current actual
value of a converter is not equal to zero, then the Control Unit opens the line-side circuit
breaker via a digital output of the TM15.
• If a DRIVE-CLiQ communication error occurs between the Control Unit and the PSAs, then it
is possible that the monitoring mechanisms under Point a) and b) no longer function reliably.
This is the reason that immediately after a DRIVE-CLiQ fault/error is detected, the circuit
breaker is tripped by the PSAs.
3.3 Functions
3.3.1 Switching sequences from the perspective of the system operator
For system operation that uses the "Two-channel 󹪝ring pulse inhibit" function, it makes sense to
maintain a sequence for deactivating and activating the 󹪝ring pulse inhibit. This also applies
when switching on the drive again.
Description
3.3 Functions
Two-channel 󹪝ring pulse inhibit
12 Function Manual, 07/2021, A5E51227986A

3.3.1.1 Activating and deactivating the 󹪝ring pulse inhibit
Selecting the 󹪝ring pulse inhibit
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Figure 3-2 Activating and deactivating the 󹪝ring pulse inhibit
Description
3.3 Functions
Two-channel 󹪝ring pulse inhibit
Function Manual, 07/2021, A5E51227986A 13

3.3.1.2 Deactivating the 󹪝ring pulse inhibit and restarting
Deselecting the 󹪝ring pulse inhibit
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Figure 3-3 Deactivating and restarting the drive
Description
3.3 Functions
Two-channel 󹪝ring pulse inhibit
14 Function Manual, 07/2021, A5E51227986A

Preparing for use 4
4.1 Wiring for cable lengths exceeding 30 m
Cable type
• Shielded cable, Sabix D345 4x2x0.5mm²
• Capacitance per unit length: 30 nF/km
• SAB Bröckskes, Siemens article number 1010084
Cable length
As a result of possible capacitances that may occur due to the cable installation, we recommend
limiting the cable length as follows:
• Removal of the triggering device for the safety relay: 100 m
• Removal of the safety relay for the PSA: 100 m
The data on maximum cable length can be found in the data sheet/application manual of the
safety relay. You will 󹪝nd further information in the Industry Mall (https://
support.industry.siemens.com/cs/ww/en/view/91198365).
Wiring
1. Connect the cable shield at both ends in the controller cabinet and the converter cabinet.
Install the cable in a protected duct.
2. Connect the shield between the safety relay and PSA to a suitable point in the cabinet
connection area (customer terminals). The internal cabinet wiring is implemented in the
factory.
The maximum permissible cable length between the safety relay and the PSA results from the
speci󹪝cation in the data sheet of the safety relay.
When calculating the cable length, take into consideration the input capacitance of the
relevant switch-o󹪜 signal path with approx. 40 nF.
Two-channel 󹪝ring pulse inhibit
Function Manual, 07/2021, A5E51227986A 15

Preparing for use
4.1 Wiring for cable lengths exceeding 30 m
Two-channel 󹪝ring pulse inhibit
16 Function Manual, 07/2021, A5E51227986A

Operation 5
It makes sense and we recommend that the drive is shut down before you activate the "Two-
channel 󹪝ring pulse inhibit" function.
• You must manually shutdown the drive if you activate the 󹪝ring pulse inhibit using a
mushroom pushbutton.
• If the 󹪝ring pulse inhibit is initiated from a higher-level, failsafe controller, then before
activation, this control can shut down the drive via the "standard" operational device
functions. The system integrator must supply and implement these higher-level functions -
and they will not be discussed here.
WARNING
Danger due to coast down of the motor
When the "Two-channel 󹪝ring pulse inhibit" function is activated while the machine is rotating,
then the motor coasts down if it has not yet come to a stop.
Incorrect use can result in death, serious injury or substantial material damage.
• Apply the appropriate protective measures to avoid danger to people resulting from the
motor coasting down after the power supply has been disconnected.
Two-channel 󹪝ring pulse inhibit
Function Manual, 07/2021, A5E51227986A 17

Operation
Two-channel 󹪝ring pulse inhibit
18 Function Manual, 07/2021, A5E51227986A