Drive Technology \ Drive Automation \ System Integration \ Services. Manual. Control Cabinet Inverter MOVITRAC B Functional Safety

Transcription

1 Drive Technology \ Drive Automation \ System Integration \ Services Manual Control Cabinet Inverter MOVITRAC B Functional Safety Edition 05/ / EN

2 SEW-EURODRIVE Driving the world

3 Content Content 1 General Information About this manual Structure of the safety notes Rights to claim under limited warranty Exclusion of liability Copyright notice Content of this publication Other applicable publications Safety Concept Limitations Representation "Safety concept for MOVITRAC B / control unit" Representation "Safety concept for MOVITRAC B / size 0" Safety-Relevant Conditions Information on the stop categories Approved devices Installation requirements Requirements on external safety relays Startup requirements Operation requirements Connection Variants Disconnection of single drives Disconnection of group drives Technical Data Index Functional safety MOVITRAC B 3

4 1 General Information About this manual 1 General Information 1.1 About this manual The manual is part of the product and contains important information about installation, startup, operation and service. The manual is written for everyone installing, starting up or servicing this product. The manual must be accessible and legible. Make sure that persons responsible for the system and its operation, as well as persons who work independently on the unit, have read through the manual carefully and understood it. If you are unclear about any of the information in this documentation, or if you require further information, contact SEW- EURODRIVE. 1.2 Structure of the safety notes The safety notes in this manual are designed as follows: Pictogram SIGNAL WORD Type and source of danger. Possible consequence(s) if the safety notes are disregarded. Measure(s) to prevent the danger. Pictogram Signal word Meaning Consequences if disregarded Example: DANGER Imminent danger Severe or fatal injuries General danger WARNING Possible dangerous situation Severe or fatal injuries CAUTION Possible dangerous situation Minor injuries Specific danger, e.g. electric shock STOP Possible damage to property Damage to the drive system or its environment TIP Useful information or tip. Simplifies the handling of the drive system. 4 Functional safety MOVITRAC B

5 General Information Rights to claim under limited warranty Rights to claim under limited warranty A requirement of fault-free operation and fulfillment of any rights to claim under limited warranty is that you adhere to the information in the MOVITRAC B documentation. Therefore, read the operating instructions before you start working with the unit. Make sure that the documentation is available to persons responsible for the system and its operation as well as to persons who work independently on the unit. You must also ensure that the documentation is legible. 1.4 Exclusion of liability You must comply with the information contained in the MOVITRAC B documentation to ensure safe operation of MOVITRAC B and to achieve the specified product characteristics and performance requirements. SEW-EURODRIVE assumes no liability for injury to persons or damage to equipment or property resulting from non-observance of the documentation. In such cases, any liability for defects is excluded. 1.5 Copyright notice 2009 SEW-EURODRIVE. All rights reserved. Unauthorized duplication, modification, distribution or any other use of the whole or any part of this documentation is strictly prohibited. 1.6 Content of this publication This publication contains conditions and amendments related to MOVITRAC B in safety-oriented applications. The system comprises a frequency inverter with asynchronous motor and safety-tested external disconnecting device. Functional safety MOVITRAC B 5

6 1 General Information Other applicable publications 1.7 Other applicable publications This document supplements the MOVITRAC B operating instructions and limits the application notes according to the following information. It can only be used in conjunction with the following publications: The MOVITRAC B operating instructions must always be observed. For permitted connection variants, refer to chapter "Connection variants" (see page 17). 6 Functional safety MOVITRAC B

7 Safety Concept kva i P f n Hz 2 2 Safety Concept In case of danger, any potential risk related to a machine must be eliminated as quickly as possible. Standstill with restart prevention is generally the safe condition for preventing dangerous movements. MOVITRAC B is characterized by the optional connection of X17 to an external failsafe, prototype tested safety relay. The safety relay disconnects all active elements (disconnection of the safety oriented 24 V power supply of the output stage control) that generate the pulse trains to the power output stage (IGBT) when a connected control device (E-STOP button with latching function) is activated. Disconnecting the 24 V voltage supply at connector X17 ensures that the supply voltages required for operating the frequency inverter and consequently for generating a rotating field of pulse patterns (which allow the generation of a rotating field) are safely interrupted, preventing automatic restart. Instead of separating the drive galvanically from the power supply using contactors or switches, the disconnection procedure described here prevents the power semiconductors in the frequency inverter from being activated, thus ensuring safe disconnection. This process disconnects the rotating field generation for the respective motor. The individual motor cannot develop any torque in this state even though the mains voltage is still present. The requirements for the safety control are clearly defined in the following sections and must be observed. Using a suitable external circuit via a safety control with approval to at least EN category 3 enables operation of the MOVITRAC B frequency inverter with safe disconnection to stop category 0 or 1 according to EN , fail-safe protection against restart according to EN 1037 and fulfillment of safety category 3 to EN Using a suitable external circuit via a safety control with approval for EN ISO , performance level "d" enables operation of the MOVITRAC B frequency inverter with safe disconnection according to stop category 0 or 1 to EN , fail-safe protection against restart according to EN 1037 and fulfillment of performance level "d" to EN ISO Functional safety MOVITRAC B 7

8 2 kva i P f n Hz Safety Concept Limitations 2.1 Limitations Important: The safety concept is only suitable for performing mechanical work on system/machine components. Important: A system/machine-specific risk analysis must always be carried out by the system/machine manufacturer and taken into account for the use of the MOVITRAC B frequency inverter. Danger of fatal injury: When the safety-oriented 24 V voltage supply is disconnected, the mains supply voltage is still present at the frequency inverter DC link. Danger of fatal injury: When the 24 V voltage supply is disconnected, the DC link voltage is still present at the MOVITRAC B frequency inverter. Important: If work is carried out on the electrical section of the drive system, the DC link voltage must be disconnected. 8 Functional safety MOVITRAC B

9 Safety Concept Representation of the "Safety concept for MOVITRAC B / control unit" kva i P f n Hz Representation of the "Safety concept for MOVITRAC B / control unit" CAN RS485 Uz+ Uz- SNT HV (9) MOVITRAC B 24V external SNT NV (2) 24V internal 24V external or 24 V internal Safety circuit 24V Safe disconnection with one pole or two poles Electric isolation (3) (1) S0V24 SVI24 24V SNT Emergency stop relay (external) X17 approved for cat. 3 acc. to EN or PL "d" EN Binary IN Binary OUT Computer core (5) Voltage supply for output stage control O.K. (not in the safety circuit) (4) Voltage supply for control of the power transistors Analog IN Temperature measuring 24 V safety disconnected / brake applied (not in safety circuit) (6) PWM Connection plug for power section Uz+ Uz- Connection plug for power section Power section (7) (8) M Power supply [1] Safety relay (external) [2] Low-voltage switch-mode power supply [3] Safety switched-mode power supply (SNT) [4] Voltage supply for controlling the power transistors [5] Feedback to the central processing unit: Voltage supply for output stage control OK (not in safety circuit) [6] Pulse width modulated signals for output stage [7] Power section [8] Motor [9] High-voltage switch-mode power supply Functional safety MOVITRAC B 9

10 2 kva i P f n Hz Safety Concept Representation of the "Safety concept for MOVITRAC B / size 0" 2.3 Representation of the "Safety concept for MOVITRAC B / size 0" MOVITRAC B 24V external SNT NV (2) 24V external 24V Safe disconnection with one pole or two poles (3) (1) S0V24 SVI24 24V SNT Emergency stop relay (external) X17 approved for cat. 3 acc. to EN or PL "d" EN CAN RS485 Safety circuit Electric isolation Binary IN Binary OUT Computer core (5) Voltage supply for output stage control O.K. (not in the safety circuit) (4) Voltage supply for control of the power transistors 24 V safety disconnected / brake applied (not in safety circuit) Analog IN (6) PWM Uz+ (7) (8) M Temperature measuring Uz- Power section Netz [1] Safety relay (external) [2] Low-voltage switch-mode power supply [3] Safety switched-mode power supply (SNT) [4] Voltage supply for controlling the power transistors [5] Feedback to the central processing unit: Voltage supply for output stage control OK (not in safety circuit) [6] Pulse width modulated signals for output stage [7] Power section [8] Motor For units of size 0 in design MC07B...-S0, an external 24 V supply must always be connected as the control electronics can only be powered in this way. 10 Functional safety MOVITRAC B

11 Safety-Relevant Conditions Information on the stop categories 3 3 Safety-Relevant Conditions The following conditions are mandatory for the installation and operation of MOVITRAC B in applications with safe disconnection of the drive in accordance with category 0 or 1 of EN and fail-safe protection against restart according to EN 1037, and conformance with safety category 3 of EN or performance level "d" of EN ISO The conditions are divided into the following sections: Approved devices Installation requirements Requirements for external safety relays Startup requirements Operation requirements 3.1 Information on the stop categories Stop category 0 means that the safety 24 V voltage supply can be disconnected independent of the setpoints. Observe the following procedure for stop category 1: Decelerate the drive using an appropriate brake ramp specified by the setpoint. Disconnect the safety-oriented 24 V voltage supply. Functional safety MOVITRAC B 11

12 3 Safety-Relevant Conditions Approved devices 3.2 Approved devices The following frequency inverters are permitted for applications with safe disconnection according to stop category 0 or 1 of EN , fail-safe protection against restart according to EN 1037 and compliance with safety category 3 according to EN or performance level "d" according to EN ISO MOVITRAC B for AC V / V supply voltage Power [kw] V Size Type S MC07B0005-5A3-4-S S MC07B0008-5A3-4-S S MC07B0011-5A3-4-S S MC07B0015-5A3-4-S L MC07B0022-5A3-4-S L MC07B0030-5A3-4-S L MC07B0040-5A3-4-S S MC07B0055-5A S MC07B0075-5A MC07B0110-5A MC07B MC07B MC07B MC07B MC07B MC07B MC07B Power [kw] V Size Type S MC07B0005-2A3-4-S S MC07B0008-2A3-4-S L MC07B0011-2A3-4-S L MC07B0015-2A3-4-S L MC07B0022-2A3-4-S MC07B0037-2A MC07B0055-2A MC07B0075-2A MC07B MC07B MC07B MC07B Functional safety MOVITRAC B

13 Safety-Relevant Conditions Installation requirements Hazard caused by coasting drive Note that if the drive does not have a mechanical brake, or if the brake is defective, the drive may coast to a halt. Note: If coasting to a halt results in application-dependent hazards, take additional protective measures (e.g. movable covers with closure), which cover the hazardeous area until persons are no longer in danger. The additional protective covers must be designed and integrated in such a way that they meet the safety category required for the machine. After activating the stop command, access to the machine must remain blocked until the drive has reached standstill, or the access time has to be determined to ensure that an adequate safety distance is maintained. 3.3 Installation requirements Note the following instructions for applications of MOVITRAC B with safe disconnection of the drive according to stop category 0 or 1 according to EN and fail-safe protection against restart according to EN safety category 3 or performance level "d" according to EN ISO The line between the safety control system (or the safety-oriented tripping device) and MOVITRAC B terminal X17 is designated as the safety-oriented 24 V voltage supply. Power lines and the safety-oriented 24 V supply voltage must be installed in separate cable ducts. The safety-oriented 24 V supply voltage must be routed according to EMC guidelines and as follows: Outside an electrical installation space: Shielded cables must be routed permanently (fixed) and protected against external damage, or other equivalent measures. Individual conductors can be routed inside an electrical installation space. Observe the respective regulations governing the application. It must be ensured that parasitic voltages cannot be generated in the safety-oriented 24 V supply voltage. The total cable length between the safety control system (e.g. safety relay) and MOVITRAC B is limited to a maximum length of 100 m for EMC reasons. The switching capacity of the safety relay and the maximum permissible voltage drop on the 24 V supply cable must be observed during disconnection of group drives. Only use terminal connections (terminal blocks) that meet EN and prevent short-circuits. Observe the notes in the "MOVITRAC B" operating instructions on EMC compliant cabling. It is essential that you apply the shielding at both ends on the housing. Only use power supplies with safe isolation (SELV/PELV) according to VDE010. According to EN , the voltage between the outputs or between any output and a ground part must not exceed DC 60 V voltage for longer than 0.2 s after only one fault. The maximum DC voltage must be 120 V. Functional safety MOVITRAC B 13

14 3 Safety-Relevant Conditions Requirements on external safety relays You must remove the jumpers at X17:1 to X17:4 (see following figure) for use in applications with safe disconnection of the drive according to stop category 0 or 1 in accordance with EN and fail-safe protection against restart according to EN safety category 3 or performance level "d" according to EN ISO The shielded lines of the safety-oriented 24 V voltage supply (terminal X17) must be clamped under the signaling electronics shield clamp. You must observe the technical data of MOVITRAC B (see MOVITRAC B operating instructions). Removing jumpers SVI SOV 24V X Requirements on external safety relays If the requirements of the standard EN are to be met, at least one approval for safety category 3 according to EN must be available. If the requirements of the standard EN ISO are to be met, at least one approval for performance level "d" according to EN ISO must be available. If the DC 24 V voltage supply is safely disconnected at the positive pole only, no test pulses must be applied to this pole in disconnected condition. Bipolar disconnection of the DC 24 V supply is permitted. The values specified for the safety relays must be adhered to when designing the circuit. 14 Functional safety MOVITRAC B

15 Safety-Relevant Conditions Requirements on external safety relays 3 The switching capacity of the safety relays must correspond at least to the maximum permitted limited output current of the DC 24 V voltage supply. Observe the manufacturer's instructions for the safety relays concerning the permitted contact loads and fusing that may be required for the safety contacts. Unless specified otherwise, the contacts must be protected with 0.6 times the nominal value of the maximum contact rating specified by the manufacturer. The controller must be designed and connected in such a way that resetting the control device itself will not lead to a restart. A restart may only be carried out after an additional reset of the controller "Safety relay" sample circuit The following figure shows the basic connection of an external safety relay (according to the before mentioned requirements) to MOVITRAC B. The information in the respective manufacturer's data sheets must be observed for connection. 1-pole disconnection of the 24 V supply voltage: Approved EMERGENCY STOP actuator element Fuses in accordance with the manufacturer specifications of the emergency stop relay 24 V 24 V voltage supply Emergency stop relay with certification for at least category 3 according to EN954-1 or performance level "d" according to EN ISO Safety-oriented 24 V supply of the emergency stop relay (e.g. PNOZ...) Reset button Functional safety MOVITRAC B 15

16 3 Safety-Relevant Conditions Startup requirements 3.5 Startup requirements Startup must be documented and the functionality of the safety functions must be demonstrated. Startup checks of the disconnecting device and the correct wiring must be performed and documented for MOVITRAC B with safe disconnection of the drive according to stop category 0 or 1 of EN , fail-safe protection against restart according to EN 1037 and compliance with safety category 3 according to EN or performance level "d" according to EN ISO At startup, the safety-related 24 V control voltage must be included in the functional test. 3.6 Operation requirements Operation is only allowed within the limits specified in the data sheets. This applies both to the external safety relay as well as MOVITRAC B. The safety functions must be checked at regular intervals to ensure proper functioning. The period of time between the tests should be specified in accordance with the risk analysis. 16 Functional safety MOVITRAC B

17 Connection Variants Disconnection of single drives 4 4 Connection Variants Refer to the publication "Safe Disconnection for MOVITRAC B - Applications" for examples of approved connection variants of units listed in the section "Approved Units" for safe disconnection of the drive according to stop category 0 or 1 of EN and fail-safe protection against restart according to EN 1037 and fulfillment of the safety category according to EN or performance level "d" of EN ISO The publication "Safe Disconnection for MOVITRAC B - Applications" is constantly being supplemented by possible applications. The publication includes checklists, which offer additional assistance in project planning and installation as well as operating MOVITRAC B drives in safety-oriented applications. It is essential that you comply with the publications listed in the section "Safety and warning instructions" for all the connection variants listed in the publication "Safe Disconnection for MOVITRAC B - Applications". 4.1 Disconnection of single drives Requirements The requirements of the manufacturers of safety relays (such as protecting the output contacts against welding) or other safety components must be strictly observed. In addition, the basic requirements described in the manual "Safe Disconnection for MOVITRAC B - Conditions" apply for cable routing. For reasons of EMC, the length of the cable between connection X17 on MOVITRAC B and the safety components (e.g. safety relay) is limited to a maximum of 100 m. Other instructions by the manufacturer on the use of safety relays for specific applications must also be observed. Functional safety MOVITRAC B 17

18 4 Connection Variants Disconnection of single drives Internal 24 V supply, stop category 0 +24V STOP START Mains connection EMEGENCY STOP Safety relay Feedback EMERGENCY STOP Reset digital input PLC digital output X12 L1 L X1 L3 * DC + 24 V '0'=Ctrl. inhibit '1'=Ctrl. enable '0'=Halt '1'=START CW '0'=Stop '1'=Enable 24VIO 9 } no factory setting Safety circuit X17 VO V output MOVTRAC B SOV24 SVI24 Reference + 24 V safe stop input +24 V safe stop input X U V W M * external DC 24 V voltage supply. Required for BG0S and BG0L! 18 Functional safety MOVITRAC B

19 Connection Variants Disconnection of single drives External 24 V supply, stop category 0 +24V HALT START Mains connection EMERGENCY STOP Safety relay Feedback EMERGENCY STOP Reset digital input PLC digital output X12 L1 L X1 L3 * DC + 24 V '0'=Ctrl. inhibit '1'=Ctrl. enable '0'=Halt '1'=START CW '0'=Stop '1'=Enable 24VIO 9 } no factory setting Safety circuit X17 VO V output MOVITRAC B SOV24 SVI24 Reference + 24 V safe stop input +24 V safe stop input X U V W M * external DC 24 V supply. Required for BG0S and BG0L! Functional safety MOVITRAC B 19

20 4 Connection Variants Disconnection of single drives Internal 24 V supply, stop category 1 +24V [1] EMERGENCY STOP Safety relay Feedback EMERGENCY STOP Reset HALT digital input PLC digital output START X12 Mains connection L1 L X1 L3 t 1 * DC + 24 V '0'=Ctrl. inhibit '1'=Ctrl. enable '0'=Halt '1'=START SW '0'=Stop '1'=Enable 24VIO 9 } no factory setting Safety circuit X17 VO V output MOVITRAC B SOV24 SVI24 Reference + 24 V safe stop input +24 V safe stop input X U V W M * external DC 24 V supply. Required for BG0S and BG0L! [1] Safety relay with adjustable time delay t1. Observe the following procedure for stop category 1: Decelerate the drive using an appropriate brake ramp specified by the setpoint. Disconnect the safety-oriented 24 V voltage supply. 20 Functional safety MOVITRAC B

21 Connection Variants Disconnection of single drives External 24 V supply, stop category 1 +24V [1] EMERGENCY STOP Safety relay Feedback EMERGENCY STOP Reset HALT digital input PLC digital output START X12 Mains connection L1 L X1 L3 t 1 * DC + 24 V '0'=Ctrl. inhibit '1'=Ctrl. enable '0'=Halt '1'=START SW '0'=Stop '1'=Enable 24VIO 9 } no factory setting Safety circuit X17 VO V output MOVITRAC B SOV24 SVI24 Reference + 24 V safe stop input +24 V safe stop input X U V W M * external DC 24 V supply. Required for BG0S and BG0L! [1] Safety relay with adjustable time delay t1. Observe the following procedure for stop category 1: Decelerate the drive using an appropriate brake ramp specified by the setpoint. Disconnect the safety-oriented 24 V voltage supply. Functional safety MOVITRAC B 21

22 4 kva i P f n Hz Connection Variants Disconnection of group drives 4.2 Disconnection of group drives Requirements For group drives, the 24 V supply of several MOVITRAC B units can be made available by a single safety relay. The maximum possible number of units (n units) results from the maximum permitted contact load of the safety relay and the maximum permitted voltage drop of the DC supply for MOVITRAC B units. Other requirements of the safety relay manufacturer (such as protecting the output contacts against welding) must be strictly observed. In addition, the basic requirements described in the manual "Safe Disconnection for MOVITRAC B - Conditions" apply for cable routing. For reasons of EMC, the length of the cable between connection X17 (MOVITRAC B) and the safety components (e.g. safety relay) is limited to a maximum of 100 m. Other instructions by the manufacturer on the safety relay used in the specific application must also be observed. Determining the maximum number of MOVITRAC B drives for disconnection of group drives The number (n units) of MOVITRAC B units that can be connected to a group drive with safe disconnection is limited by the following points: 1. Switching capacity of the safety relay. A fuse must be connected in front of the safety contacts according to the specifications of the safety relay manufacturer to prevent the contacts from sticking or welding. The project planner is responsible for ensuring that the specifications on the switching capacity according to EN , 02/1 and EN , 11/97 as well as on contact fuse protection given in the operating instructions of the safety relay manufacturer are strictly observed. 2. Maximum permitted voltage drop in the 24 V power supply cable. Values concerning cable lengths and permitted voltage drops must be observed during project planning for group drives. 3. Maximum cable cross section of 1x1.5 mm 2 or 2x0.75 mm 2. A calculation based on the technical data of MOVITRAC B must be performed separately for each group drive application. 22 Functional safety MOVITRAC B

23 Connection Variants Disconnection of group drives External 24 V supply, stop category 0 +24V Mains connection HALT START EMERGENCY STOP Safety relay Feedback EMERGENCY STOP Reset Safety circuit digital input PLC digital output * DC + 24 V X '0'=Ctrl. inhibit '1'=Ctrl. enable '0'=Halt '1'=START CW '0'=Stop '1'=Enable X17 24VIO 9 L1 L X1 L3 } no factory setting MOVITRAC B VO V output SOV24 Reference + 24 V safe stop input SVI V safe stop input X U V W M * DC + 24 V X '0'=Ctrl. inhibit '1'=Ctrl. enable '0'=Halt '1'=START CW '0'=Stop '1'=Enable X17 24VIO 9 X1 } no factory setting MOVITRAC B VO V output SOV24 Reference + 24 V safe stop input SVI V safe stop input X2 * external DC 24 V supply. Required for BG0S and BG0L! Functional safety MOVITRAC B 23

24 4 Connection Variants Disconnection of group drives External 24 V supply, stop category 1 +24V Mains connection HALT START [1] EMERGENCY STOP Safety relay t 1 Feedback EMERGENCY STOP Reset Safety circuit digital input PLC digital output * DC + 24 V X '0'=Ctrl. inhibit '1'=Ctrl. enable '0'=Halt '1'=START CW '0'=Stop '1'=Enable X17 24VIO 9 L1 L X1 L3 } no factory setting MOVITRAC B VO V output SOV24 Reference + 24 V safe stop input SVI V safe stop input X U V W M * DC + 24 V X '0'=Ctrl. inhibit '1'=Ctrl. enable '0'=Halt '1'=START CW '0'=Stop '1'=Enable X17 24VIO 9 X1 } no factory setting MOVITRAC B VO V output SOV24 Reference + 24 V safe stop input SVI V safe stop input X2 * external DC 24 V supply. Required for BG0S and BG0L! [1] Safety relay with adjustable time delay t1. Observe the following procedure for stop category 1: Decelerate the drive using an appropriate brake ramp specified by the setpoint. Disconnect the safety-oriented 24 V voltage supply. 24 Functional safety MOVITRAC B

25 Technical Data kva i P f n Hz 5 5 Technical Data X17 safety input, terminal 4 Voltage / cross-section / duration Min. Typ. Max. Unit Safety-oriented 24 V supply voltage DC V Power consumption (size / capacity) BG0S / BG0L / 27 µf BG1 / 270 µf BG 2/2S / 270 µf BG3 / 270 µf BG4 / 270 µf BG5 / 270 µf Cable cross-section of safety-oriented 24 V supply voltage mm 2 Time between disconnection of the safety-oriented 24 V supply voltage at MOVITRAC B until the disconnection of the pulse pattern at output stage t switch-off. Size 0 Sizes 1 to W ms Functional safety MOVITRAC B 25

26 Index Index A Approved devices...12 MOVIDRIVE MDX60B/61B ( VAC)..12 C Connection variants...17 Content of this publication...5 Copyright...5 D Disconnection of group drives...22 Connection variant "external 24 V supply, stop category 1"...24 Connection variant "external 24 V supply, stop cat. 0"...23 Determining the maximum number of MDX60B/61B drives...22 Disconnection of single drives...17 Connection variant "external 24 V supply, stop category 0"...19 Connection variant "external 24 V supply, stop category 1"...21 Connection variant "internal 24 V supply, stop category 0"...18 Connection variant "internal 24 V supply, stop category 1"...20 Requirements...17 Documentation, applicable...6 Drive coasting (information)...13 E Exclusion of liability...5 External safety relays...14 O Operation, requirements...16 P Publications, applicable...6 R Requirements External safety relays...14 Installation...13 Operation...16 Startup...16 Rights to claim under limited warranty...5 S Safety concept...7 Limitations...8 Schematic representation...9, 10 Safety notes Structure...4 Safety relays, external...14 Requirements...14 Sample circuit...15 Switching capacity...15 Safety-relevant conditions...11 Startup, requirements...16 Stop categories, information...11 Structure of the safety notes...4 U Use of the manual...4 G Group disconnection Requirements...22 I Installation Notes on routing control lines...13 Permitted terminal connections...13 Requirements...13 N Notes, general Functional safety MOVITRAC B

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