WEG SCA06 User manual

Motors | Automation | Energy | Transmission & Distribution | Coatings
Servo Drive
Servoconvertidor
Servoconversor
SCA06 - STO Option Board
User’s Manual
Manual del Usuario
Manual do Usuário

Safety Manual
Series: SCA06
Language: English
Document: 10004016577 / 02
Models: 4 A / 220 ... 230 V single-phase
5 A / 220 ... 230 V three-phase
8 A / 220 ... 230 V three-phase
16 A / 220 ... 230 V three-phase
24 A / 220 ... 230 V three-phase
5.3 A / 380 ... 480 V three-phase
14 A / 380 ... 480 V three-phase
Date: 06/2022

4 | SCA06
Summary of Revisions
English
The table below describes the revisions made to this manual.
Version Revision Description
-R00 First edition
-R01 General revision
-R02 General revision
TÜV certificate update

Summary
English
1 APPROVALS......................................................................................... 7
2 GENERAL INFORMATION ................................................................ 10
2.1 ABOUT THE MANUAL ............................................................................. 10
2.2 PRELIMINARY RECOMMENDATIONS ................................................. 10
2.3 SAFE TORQUE OFF ................................................................................ 11
3 INSTALLATION .................................................................................. 13
3.1 TYPES OF INSTALLATION ...................................................................... 16
4 COMMISSIONING ............................................................................. 18
5 MAINTENANCE ................................................................................. 19
6 DECOMMISSIONING ........................................................................ 21
7 SAFETY DATA .................................................................................... 22

SCA06 | 7
Approvals
English
1 APPROVALS
EC DECLARATION OF CONFORMITY
Manufacturer’s name:
WEG Drives & Controls - Automação Ltda.
Manufacturer’s address:
Avenida Prefeito Waldemar Grubba, 3000
Jaraguá do Sul - SC - Brazil
89256-900
And our representative established within the European Community:
WEG Germany GmbH
Industriegebiet Türnich 3, Geigerstraße 7, 50169
Kerpen Türnich - North Rhine-Westphalia
Germany
We hereby declare that the safety functions of the following product
Product Name:
SSC 1.00 option board to be used with WEG SCA06 family products
Product Identification:
10859533 - CARTÃO ELETRÔNICO SSC1.00
Product Safety Functions:
Safe Torque Off according to EN 61800-5-2 standard
fulfills all of the relevant safety component requirements of Machinery Directive,
2006/42/EC.
Notified body that carried out the EC type examination:
TÜV Rheinland Industrie Service GmbH
51105 Köln / Germany
Notified Body No.: 0035
The following standards and/or technical specifications referenced below were used:
IEC 61508 - 1 to 7: 2010
Functional safety of electrical/electronic/programmable electronic safety-related
systems
EN 61800-3:2004+A1:2011
Adjustable speed electrical power drive systems
Part 3: EMC requirements and specific test methods
EN 61800-5-1: 2007
Adjustable speed electrical power drive systems
Part 5: Safety requirements / Section 1: Electrical, thermal and energy

8 | SCA06
Approvals
English
EN 61800-5-2: 2007
Adjustable speed electrical power drive systems
Part 5: Safety Requirements / Section 2: Functional
EN ISO 13849-1: 2008 + AC:2009
Safety of machinery – Safety-related parts of control systems
Part 1: General principles for design
EN ISO 13849-2:2012
Safety of machinery – Safety related parts of control systems
Part 2: Validation
EN 60204-1: 2006 + A1:2009 + AC:2010
Safety of machinery – Electrical equipment of machines
Part 1: General requirements
EN 62061: 2005 + AC:2010 + A1:2013
Safety of machinery – Functional safety of safety-related electrical, electronic and
programmable control systems
IEC 61326-3-1
Electrical equipment for measurement, control and laboratory use – EMC requirements
Part 3-1: Immunity requirements for safety-related systems and for equipment intended
to perform safety-related functions (functional safety) – General industrial applications
EN 50178: 1997
Electronic equipment for use in power installations
UL 508C: 2004
Power Conversion Equipment
Signature
In Jaraguá do Sul, 29th of January, 2016.
Norton Petry
R&D Manager

SCA06 | 9
Approvals
English

10 | SCA06
General Information
English

SCA06 | 11
General Information
English
2 GENERAL INFORMATION
NOTE!
These are the original instructions.
2.1 ABOUT THE MANUAL
This manual provides the necessary information to install and configure the Safety
Function Safe Torque Off of the SCA06 servodrive. This manual must be used together
with the User’s Manual and the Programming Manual of the SCA06 servodrive.
For further details about the installation, how to perform commissioning, technical
characteristics and how to identify and fix the most common problems of the SCA06
servodrive, refer to the User’s Manual.
For information about programming the SCA06, refer to the Programming Manual.
All manuals are available for download on WEG website – www.weg.net.
2.2 PRELIMINARY RECOMMENDATIONS
DANGER!
Only duly qualified personnel, familiar with Functional Safety, with
the SCA06 servodrive and related equipment must plan or perform
the installation, commissioning, operation and maintenance of this
equipment.
The personnel must follow the safety instructions described in this
manual and/or defined by local standards.
The noncompliance with the safety instructions may result in
deathrisk and/or equipment damage.
NOTE!
For the purposes of this manual, qualified personnel are those trained
in order to be able to:
1. Install, ground, power up and operate the SCA06 in accordance with
this manual and the safety legal procedures in force.
2. Use the protective equipment according to the relevant standards.
3. Give first aid.

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General Information
English
DANGER!
Always disconnect the general power supply before touching any
electrical component associated to the servodrive.
Many components may remain charged with high voltages and/or
moving (fans), even after the AC power supply input is disconnected
or turned off.
Wait for at least ten minutes so as to guarantee the full discharge
of the capacitors.
Always connect the frame of the equipment to the protection
grounding (PE) at the proper point.
ATTENTION!
The electronic boards have components sensitive to electrostatic
discharges. Do not touch directly the components or connectors.
If necessary, first touch the grounded metallic frame or use proper
grounding strap.
2.3 SAFE TORQUE OFF
The SCA06 servodrive can be equipped with a redundant dual channel Safe Torque
Off (STO) function.
The STO function acts on the removal of torque from the motor, i.e., no power that can
cause torque is present on the motor after enabling the Safe Torque Off function. The
difference of the Safe Torque Off function from a normal way to disable the motor is
that the first one does it with very high levels of reliability against unexpected motor
starts, even under a fault condition. For this reason, it is allowed to be used where safety
must be guaranteed. See safety specifications presented at the end of this chapter.
Once activated, the STO function removes the power from the electronics, causing
the motor to coast due to the load inertia. See Figure 2.1 on page 13.
ATTENTION!
While the Safe Torque Off mode is activated, hazardous voltages may
still be present on the motor. Before any intervention on electrical parts,
the whole system must be deenergized.
ATTENTION!
In circumstances where external influences, e.g., falling of suspended
loads are present, additional measures like mechanical brakes, for
example, may be necessary to prevent any hazard.
A risk analysis must be performed by the end user in order to identify
and cover all possible risks and hazards.

SCA06 | 13
General Information
English
t
STO
Motor
speed
Figure 2.1: Safe Torque Off behavior
NOTE!
The Safety of whole system depends on the final certification of
the equipment/safety function where the servodrive is applied. This
certification is responsibility of the final equipment manufacturer. WEG
is not liable for damage and/or losses due to the use or application of
the servodrive. For the same reasons, WEG is not liable for applications
based on figures and examples described in this manual, which are
presented for illustrative purposes only.
NOTE!
This function should not be used as a control for starting and/or
stopping the motor.
NOTE!
The Safe Torque Off function takes priority over all other functions of
the servodrive.

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Installation
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SCA06 | 15
Installation
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3 INSTALLATION
The servodrive must be installed according to the instructions of the SCA06 user’s
manual.
If pollution degree 2 cannot be guaranteed, IP54 protection class must be used.
The connections of the Safety signals are made at connector X7, located at the bottom
of the servodrive, according to Figure 3.1 on page 15 and Figure 3.2 on page 16.
Additionally, the type of safety signals coming from the installation must be chosen at
a Dip Switch. See location at Figure 3.1 on page 15. The Dip Switch must be set
before energization, according to the description below:
"D" for Dry Contact devices, i.e., all devices that have electromechanical output
contacts, like relays.
"O" for OSSD (Output Signal Switching Device), i.e., devices that have outputs
containing test pulses.
NOTE!
The 24 Vdc power supply must attend Low Voltage Directive (2006/95/
EC), applying the specifications of IEC 61131-2:2007, Programmable
controllers - Part 2: Equipment requirements and tests and must attend
one of the following specifications:
Safety extra-low voltage (SELV) type, according to EN60950.
Protected extra-low voltage (PELV) type, according to EN60204.
The minimum installation necessary to operate the safety function is shown at Figure
3.3 on page 17.
Figure 3.1: X7 connector and OSSD selector

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Installation
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Tabl e 3.1: Dry Contact / OSSD selector
Dip Switch Configuration Description
Both switches set to Dry Contact. This configuration must
be chosen when the safety signals are commanded by dry
contacts, for example, relay contacts, as shown on Figure 3.4
on page 18
One switch set to "D" (Dry contact) and another set to "O"
(OSSD). This is a not valid combination and results on a Fault
state (F0160) shown by the servodrive after energization. The
servodrive will not work
One switch set to "D" (Dry contact) and another set to "O"
(OSSD). This is a not valid combination and results on a Fault
state (F0160) shown by the servodrive after energization. The
servodrive will not work
Both switches set to OSSD. This configuration must be chosen
when the safety signals are commanded by OSSD (Output
Signal Switching Device), for example, safety relays, as shown
on Figure 3.5 on page 19
X7
1
3
5
2
4
6
Pin Name Description
1GND Reference for +24 Vdc PELV/SELV supply
2STO2 Safety input n°2
3SP2 Safety signal for STO2 input
4STO1 Safety input n°1
5SP1 Safety signal for STO1 input
6 +24 Vdc +24 Vdc PELV/SELV supply, provided by the
customer
Figure 3.2: X7 connector description

SCA06 | 17
Installation
English
For X7 control cabling consider the following:
Wire stripping length: 6.0 mm (0.236 in).
Wire gauge from 0.5 mm² (20 AWG) to 1.0 mm² (16 AWG).
Screw M2, maximum tightening torque of 0.20 N.m (1.8 lbf.in).
Run the cables separated from the remaining circuits (power, 110 V / 220 Vac
control, etc.).
AC input
3Ø
24 Vdc
PELV /
SELV STO 1
X5
X7
STO 2
R
S
T
PE
Figure 3.3: Basic Installation

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Installation
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3.1 TYPES OF INSTALLATION
+24 Vdc 6
4
2
5
3Safety Board
X7
1
STO1
STO2
GND
Figure 3.4: Installation using dry contacts
Table 3.2: Truth table for dry contacts operation
STO1
(Contact
Between
X7:4-5
Terminals)
STO2
(Contact
Between
X7:2-3
Terminals)
Safety Stop
Function Servodrive Behavior
Open Open Activated
(enabled)
Servodrive remains in STO state and does
not accept commands. The servodrive
indicates "STO" on the keypad
Open Closed
Fault
Servodrive trips to Fault "F0160" if this status
lasts longer than 1 s
To reset the fault, both contacts must be
at the same status and the +24 Vdc supply
must be deenergized and reenergized
Closed Open
Closed Closed Disabled Servodrive accepts commands normally

SCA06 | 19
Installation
English
Safety Board
X7
6
4
2
5
3
1
STO1
STO2
GND
Figure 3.5: Installation using OSSD signals
Table 3.3: Truth table for OSSD signals
STO1
(Voltage
Between
X7:1-4
Terminals)
STO2
(Voltage
Between
X7:1-2
Terminals)
Safety Stop
Function Servodrive Behavior
0 V 0 V Activated
(enabled)
Servodrive remains in STO state and does
not accept commands. The servodrive
indicates "STO" on the keypad
0 V 24 V
Fault
Servodrive trips to Fault "F0160" if this status
lasts longer than 1 s
To reset the fault, both contacts must be
at the same status and the +24 Vdc supply
must be deenergized and reenergized
24 V 0 V
24 V 24 V Disabled Servodrive accepts commands normally

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Installation
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