clever HV-Motor assembly- and operating instructions ASSEMBLY- AND OPERATING INSTRUCTIONS HV-MOTOR/37500 SMART

Transcription

1 clever HV-Motor assembly- and operating instructions drive system motor control unit SMART 1

2 PREAMBLE Dear Customer, >> Thank you for deciding to purchase this product from our company. This operating instruction will explain how to assemble, use and service the sit - stand table. All sit - stand tables are subject to a function and quality test before they leave our factory. If you should still have problems with your table frame, you can contact our service department at any time. The table frame must be assembled according to this instruction. Changes to the table frame or improper use can have an effect on the safety, function and the service life! This operating instruction is for all sit - stand tables from the clever HV-Motor range. Figures can deviate from the actual items due to different models/types. Veyhl GmbH INDEX OF CONTENTS >> Intend use... 3 >> Target group and previous knowledge... 3 >> Symbols used in safety notices... 3 >> Safety notices... 4 >> General safety notices... 4 >> Before installing, uninstalling, or troubleshooting... 6 >> Before operation... 6 >> During operation... 7 >> Important information for resellers... 7 >> Important service information... 8 >> Repairs... 8 >> Warranty... 8 >> Maintenance / Cleaning... 9 >> Assembly ) Assembly the cantilever feet ) Assembly the beam and support plate ) Assembly the table top ) Assembly the control unit and control panel

3 >> Putting into operation ) Connectors on the SMART motor control unit ) Procedure for putting into operation ) Connecting drives ) Connecting the control panel ) Connect power cable >> Initialisation / Reset >> Operation ) Normal operation (with all control panel versions) ) Operation with COMFORT / Touch / inlay control panel with display and memory ) Enabling and disabling the screen lock TOUCH / inlay control panel: ) Function Slow moving speed areas ) Optional feature safety area >> Troubleshooting >> Error messages on the display of the control panel (optional) >> Control unit click codes >> Technical data >> Tests and Certificates

4 INTEND USE This sit-stand table may only be used as an office desk in the professional field. Changes to the table frames are not permitted. This sit-stand table must be assembled and put into operation and its function checked by skilled staff. The use of this sit-stand table for a purpose other than that mentioned above is permissible only with the consent of Veyhl GmbH. The basic function of the table is electromotive height adjustment of the table top. This function can be performed with all control panels available from us. TARGET GROUP AND PREVIOUS KNOWLEDGE This manual is intended for the following individuals: Set-up personnel who assemble the sit-stand tables and put them into operation. Staff who set up furniture and maintenance personnel who put the sit-stand tables into operation in stores or at premises of the end user The following skills are required to assemble the sit-stand tables and put them into operation: Basic knowledge of mechanical and electrical engineering (corresponding training) Reading the manual SYMBOLS USED IN SAFETY NOTICES Danger. This safety notice indicates a threat of danger to the life and health of individuals! Failure to follow these instructions can result in effects on health, life-threatening injuries, and damage to property. Caution: This safety notice indicates possible electrical hazards! Failure to follow these instructions can result in injury and damage to property! Note: This safety notice indicates important information that must be observed for safe operation of the sit-stand table. Danger: This safety notice indicates a possible risk of crushing in exceptional circumstances. Failure to follow these instructions can result in effects on health, lifethreatening injuries, and damage to property. 4

5 Note: Indicates the obligation to read the operating instructions! Note: The power plug must be disconnected before the next step! SAFETY NOTICES This manual contains safety notices that draw your attention to possible dangers and thus enable the safe operation of the sit-stand table. Make sure you observe these safety instructions! In this section you will find general safety notices that do not relate to any specific operation. The activity-specific safety notices can be found in to the relevant section of the assembly and operation instructions. Additional safety information can be found directly on the individual parts of the sit-stand table. GENERAL SAFETY NOTICES Note: Make sure you read and observe the operating instructions before assembling the sit-stand table/ putting it into operation! Caution: Never open the SMART motor control unit! There is a risk of electric shock. Caution: The sit-stand tables are not designed for continuous operation. The table top height can be adjusted without interruption no longer than the operating time indicated on the type plate. Caution: The SMART motor control unit may essentially only be operated with the mains voltage specified on the type plate! Before putting the table into operation, check that the mains voltage on the motor control unit type plate matches your mains voltage! Danger: This unit can be used by children aged 8 years and above and by persons with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, if they are supervised or have been instructed in the safe use of the unit and understand the hazards involved. 5

6 Danger: Children must not play with the device. Danger: Cleaning and user maintenance must not be undertaken by children without supervision. Caution: Be sure to use the supplied power cable! Make sure that the power cable is not damaged. Operating the sit-stand table with a damaged power cable is prohibited! Caution: If the power cable of this appliance is damaged, it must be replaced by the manufacturer or its customer services or a similarly qualified person to avoid danger Caution: Before connecting or disconnecting drives, control panels, or other accessories to the motor control unit, be sure to disconnect the power cable from the mains. Caution: Use only original accessories from Veyhl GmbH. The use of parts and components from third parties is prohibited! Using unsuitable accessories may cause damage or destruction of the table frame. Caution: If a fault occurs (e.g. unwanted movement of the table top, for example, if a button on the control panel gets stuck), please unplug the power cable immediately! Danger: Protect the table frame and in particular all electrical components on the table frame against moisture and dripping or splashing water! Danger: There is a danger of crushing when changing the table top position! Therefore, make sure that no objects or people are in the danger zone and that no one will reach into the danger zone! Solid objects are usually detected by the optional collision protection, but the danger of crushing for persons still exists! The collision protection protects the system, NOT people! Danger: All moving parts of the table frame must be a necessary safety distance of min. 25 mm from adjacent components. 6

7 Caution: Modifications to the components of the table frame, including the motor control unit and the control panels, are not allowed! Danger: The electric motor-driven sit-stand table may not be operated in an explosive atmosphere! Danger: If an error occurs, the table might move slightly with every attempt to start it before the safety shutdown come into action. Please note that there is a crushing hazard during this. Danger: The optional collision protection is not active during any resets (Initialisation / reset section). Pay attention to a possible danger of crushing. Caution: If the product is visibly damaged, makes unusual noises, or causes odours, it may not be assembled or used! BEFORE INSTALLING, UNINSTALLING, OR TROUBLESHOOTING Stop the sit-stand table. Note: Turn off the power and unplug the power cord! Take any weight off the sit-stand desk. Electrical equipment may only be opened or replaced by qualified electricians. The table must not be operated in humid rooms such as bathrooms. The table must not be used in potentially explosive environments. BEFORE OPERATION Make sure that the table has been assembled according to these instructions. Check whether the operating voltage of the table matches your local power supply. (See type plate on the control unit, standard = 230V) Connect the control unit with the control panel and the electrical columns. Connect the control unit's power cable. 7

8 DURING OPERATION If the drive or the control unit causes unusual noises or smells during operation, unplug the power supply. Make sure that the cables are not damaged. During operation of the sit-stand table, make sure that there are no objects or body parts that can be pinched. All moving parts of the table frame must be a distance of min. 25 mm from adjacent components. IMPORTANT INFORMATION FOR RESELLERS Retailers are defined as those companies that purchase sit-stand tables from Veyhl GmbH, fit them with a table top, and sell them as their own product. Note: For the sake of EU-conformity and product safety, we recommend providing users of your products with operating instructions in the relevant official EU language. Note: Include operating instructions containing all safety notices required by the end user for the safe use of your product with your end product. Note: The operating instructions for your end product must contain the following notice: Be sure to read the operating instructions before putting the product (height adjustable workstation) into operation. Tell your end users that the operating instructions must be kept strictly in close proximity to the product (height adjustable workstation). Danger: Make sure you subject your product (height-adjustable workstation) to a risk analysis so that you can respond to possible residual risks (e.g. through constructive measures or notices in the operating instructions and/or safety instructions for your product). Note: Make sure that no unauthorised persons (e.g. infants, persons under the influence of medication, etc.) handle your product or the sit-stand table. 8

9 IMPORTANT SERVICE INFORMATION Danger: Use only original accessories! These may only be fitted by competent service personnel! Otherwise, you lose warranty and guaranty claims. Danger: In the event of a fault, please contact your customer services immediately! Only original spare parts are permitted for repairing the sit-stand table. These may only be replaced by competent service personnel! Otherwise, you will lose warranty and guarantee claims. REPAIRS In the event of a technical fault with this device, please contact a customer service centre authorised by us. You can find the solution for simple possible faults in the Error Messages section! Caution: To prevent malfunction, all repairs should be performed only by authorised service personnel. Caution: If components of this table frame are opened, there is a risk of subsequent malfunction. WARRANTY We give a warranty for these table frames for a period of 24 months. The warranty covers all material and production faults and is valid from the date of manufacture (see type plate). The guarantee is valid only under the condition that the table frames were assembled and installed properly and professionally within the parameters described and the maintenance and repair were only carried out by authorised service personnel. The sit-stand table may not be handled or used improperly, and no changes may be made to the table frame, otherwise the warranty will become invalid. For more information, please refer to our General Terms and Conditions. 9

10 MAINTENANCE / CLEANING Regularly remove dust and dirt from the table frame, in particular from the guide tubes, and make sure that there is no damage or cracks. Check all fastening bolts are tight, check all connectors, cables, and plugs, and check proper function. Danger: The control unit, the control panel, and the table frame may only be cleaned with a dry or slightly damp cloth. Danger for persons! Caution: Aggressive cleaning agents may cause damage or discolouration to the product. Only agents with a ph value of 6-8 may therefore be used. Danger: Make sure that no liquid gets into the system (control unit, control panel, cables, and frame). Danger for persons! 10

11 ASSEMBLY Use only the screws in accordance with the enclosed assembly diagram for assembling your desk frame. Caution: Incorrect screws can cause damage to the table. Danger: When assembling the table frame, the power cable of the motor control unit must be disconnected from the mains! Caution: Before assembling the sit-stand table and putting it into operation, make sure that the product is acclimatized to the temperature and humidity values specified in the technical data for operation! 1) Assembly the cantilever feet For side bases with fixed welded cantilever feet, continue with point 2 (assembly the beam and support plate). For side bases with bolted cantilever feet, they must first be assembly on the columns, using the screws according to the assembly diagram. The max. tightening torque is 10 Nm! The max. screw-in depth of the M10 screws in the drive column is 9 mm! For asymmetrical cantilever feet (C-leg), keep in mind that a left and a right side base is required. Screws M10 according frame drawing column cantilever feet screw M10 (2x) 11

12 2) Assembly the beam and support plate First assemble the mounting column in the appropriate sections of the beam. The M8 screws are only used when mounting the support plate. Note: Make sure that the hexagonal SW8.8 at the top of the mounting column is inserted smoothly into the hexagon of the drive motor premounted in the beam. For positioning, the hexagon of the mounting column can be rotated clockwise using an SW9 open-end spanner. The mounting column is rotationally symmetrical. Assembling overhead column button head screw M8x12 (4x) beam support plate Assembling in the operating position beam support plate button head screw M8x12 (4x) column Then assemble the support plate with the M8 screws according to the frame diagram through the thread in the mounting column on the beam. The maximum tightening torque for these screws is 10 Nm. 12

13 3) Assembly the table top Now fasten your table top to the table frame according to the frame diagram. There are Ø 6.5mm holes for this on the table frame, suitable for Ø 5mm to Ø 6mm screws. All provided screw points must be used. *1) 4) Assembly the control unit and control panel Now assemble the control unit and the control panel on the table top. There are Ø 5.4mm holes for this on the control unit and Ø 4.5mm holes on the control panel. You should use screws with a lens or cylinder head on the control unit. The tightening torque depends on the material of the table top, but should not exceed 2 Nm. *1) *1) The screws are not supplied with the table frame, because they must be selected based on the material and thickness of the table top. PUTTING INTO OPERATION Putting the device into operation involves those activities that are required so that an electrically adjustable sit-stand table can be height-adjusted by means of the SMART motor control unit. Requirements for putting the device into operation are: the table frame is fully assembled (Installation section 1-3) the SMART motor control unit and the control panel are mounted (Installation section 4) Danger: The motor control unit must be put into operation by expert personnel! Expert personnel have the necessary electro-technical training and are familiar with these operating instructions. Caution: Before assembling the sit-stand table and putting it into operation, make sure that the product is acclimatized to the temperature and humidity values specified in the technical data for operation! 13

14 1) Connectors on the SMART motor control unit pin assignment Clip-on control panel Motor socket 1 (M1) Motor socket 2 (M2) Mains socket 2) Procedure for putting into operation Caution: Only plug in the power cable after all other electrical connections have been made! (All motors, the control panel and any other accessories are connected to the control unit.) Proceed as follows to put the sit-stand table into operation: 3) Connecting drives Make sure that the connection cables of the drives on both sides up reach the respective connectors on the control unit. It may be necessary to mount the control unit off-centre in the case of angle combinations or extremely long tables. An extension cable for the connecting cable of the drives may be necessary for very large table frames. Connect the drives on the side bases to the control unit using the motor cable. The plug connections must lock firmly into the 8-pole motor sockets! In the case of control units with more connections for drives than there are drives, start with the (M1) connection. (Needles connections remain unused if necessary.) Note: When plugging in the motor cable, the sequence M1, M2 must be followed! 14

15 4) Connecting the control panel Connect the control panel to the 7-pole control panel socket (HS) on the control unit. Note: You can choose from a wide range of control panels suitable for the SMART motor control unit! For, information on the available types, please contact Veyhl GmbH. 5) Connect power cable Caution: Before connecting the power cable, check again whether the mains voltage corresponds to the type plate of your control unit that all components are plugged into the appropriate jacks The SMART motor control unit is ready for operation when the power supply cable is plugged in! Note: The first time you connect the power cord / power cable, initialisation of the table frame (RESET) is required; this is described in the Initialisation / Reset section. Caution: Use only the supplied power cord! The SMART motor control unit necessarily requires a 3-pin power cable with earth wire. Caution: Attach all cables to the table frame or the table top so that there can be no damage during operation. 15

16 INITIALISATION / RESET After assembly, or when the table has been disconnected from the power supply for a long time, or if there has been a malfunction with the table, or when the connection between the drives and the control unit has been separated - the table's control unit must be initialised. When the control unit is awaiting a new initialisation, only downward movement of the table with a reduced speed is possible. To initialise, move the table to the lowest position - hold the down button on the control panel down until all drives have reached the lowest position. Then press the down button again and keep it pressed (about 5 seconds) until the table has made a slight movement downward and up again; only release the button when the table no longer moves. Releasing the button too early leads to a malfunction of your table; if this happens accidentally, you need to repeat the process. Caution: The upper end position is preset in the control unit. For this reason, only control units that have been supplied to fit each table frame may be used! Danger: During all resets, the optional collision protection is not active. Pay attention to a possible danger of crushing. 16

17 OPERATION 1) Normal operation (with all control panel versions) The Up and Down buttons move the table up or down in direction of the arrow; the table stops when it reaches the end position. Hold the button until the desired position has been reached. down up down up down up 2) Operation with COMFORT / Touch / inlay control panel with display and memory This control panel is also equipped with a display to show the current table height in centimetres or inches, as well as being able to store 2 or 4 "Memory" positions (table heights). The display can be pushed under the front edge of the table top if desired. 15 mm moveable up up down memory position key display down up down display memory Key memory key display memory key memory position keys memory position Keys comfort - hand panel touch - hand panel inlay - control panel Note: For more information assembly, the push-push function, and advanced features of the TOUCH and inlay control panel, please refer to the separate operating instructions. a) Comfort control panel - Saving a position: Move the table to the desired height using the UP or DOWN buttons. Then press the SAVE button (the display shows "S -") and then one of the position buttons 1-4 (the display will show "S 1"). The control unit confirms the saving process with a double-click sound and after about 2 seconds, the display will show the current table height again. A maximum of 4 different positions can be saved in this way. 17

18 b) Comfort control panel - Calling up a saved position: Hold down the button of the desired saved position (1, 2, 3, or 4) and the table will move to the saved position regardless of the current position. The button must be pressed until the position is reached; if the button is released prematurely, the table will stop. c) Comfort control panel - Adjusting a height display If the height displayed does not match the actual height of the table top, the display can be corrected as follows: Press and release the SAVE button. Press the DOWN button for about 5 seconds, until the height display starts flashing. Measure the height of the table and enter the measured value (in centimeters or inches depending on the setting) using the UP or DOWN button. Confirm your entry by pressing the SAVE button briefly. To exit the menu without making a selection, wait about 10 seconds until the height display appears again. d) Comfort control panel - Changing the unit of the height display (S5 menu) The control panel display can show the height in both centimetres and inches. The unit can be changed using the S5 menu. If the display has been set to centimetres, after the menu selection the height is displayed in inches, while if the display was previously in inches, it can likewise be changed to centimetres. To change the unit, proceed as follows: Press 1, 2, and UP together until the display shows "S X". (X represents a number - continue to the step after the next one as soon as "S 5" is displayed) Press the UP or DOWN button until the display shows "S 5". Confirm by pressing the SAVE button. Now the display is changed from centimetres to inches or from inches to centimetres, depending on the previous setting. To exit the menu without making a selection, wait about 10 seconds until the height display appears again. 18

19 e) Comfort control panel - Container-stop and shelf-stop position These two functions can be used to limit the range of movement of the sit-stand table (for example if there is a container under the sit-stand table). A container-stop position can be set only in the lower half of the movement range, a shelf-stop position only in the upper half of the movement range. If a container stop position is set, it is used as the lower end position, while a shelf-stop position corresponds to the upper end position of the movement range. To save a container- or shelf-stop position, follow these steps: Move the sit-stand table to the position that you want to use as a new container- or shelf-stop position - Control panel up / down: Now press the up and down buttons simultaneously for 10 sec - COMFORT control panel: Press the Save button for 10 seconds The control unit confirms the saving process with a double-click sound To deactivate a container- or shelf-stop position, follow these steps: Move the sit-stand table to any position in the lower half of the movement range to deactivate the container-stop, or in the upper half of the movement range for the shelf-stop position - Control panel up / down: Now press the up and down buttons simultaneously for 10 sec - COMFORT control panel: Press the Save button for 10 seconds Note: These steps must be performed separately for the container-stop position and the shelf-stop position! This feature is only available for motor group 1! 19

20 3) Enabling and disabling the screen lock TOUCH / inlay control panel: The screen lock is enabled or disabled by swiping the display. A key is shown on the display when the key lock is activated. The key lock is activated and deactivated by swiping left or right below the display. Note: The swiping direction is not relevant. Note: Make sure that you only swipe across the display lightly without pressing any of the buttons. Note: At the time the key lock is activated / deactivated, the display must be active (e.g. showing the current height). Briefly pressing a button, for example on the UP button, activates the display. 4) Function Slow moving speed areas This function (low speed area) causes the speed to slow down automatically during adjustment of the table top before reaching the following positions: Uppermost and lowermost table top position All saved positions (e.g.: memory positions, container-stop position) 20

21 5) Optional feature safety area This function causes a safety stop at a defined table top position (preset by software in the control unit), for example, 25 mm above the lower table top position. The safety stop works as follows: Press the table position key down (and hold it down). The table top is moved to the beginning of the safety area. The adjustment of the table top is stopped above the safety margin. Press the table position key down again. The table top is then adjusted to the lowest table top position. Note: Table top positions cannot be saved in safety areas! 21

22 TROUBLESHOOTING Error Cause Remedy Table does not move Table only moves downwards slowly Table only moves slowly Table only moves briefly on one side and then stops No power supply No or loose connection to the drives / side bases No connection to the control panel max. lifting capacity exceeded max. operating time exceeded Defective drive Defective control unit Defective control panel Control unit is awaiting re-initialisation max. lifting capacity exceeded No or loose connection to the drives / side bases Defective drive Plug in the power cable, if necessary check connection on the control unit Check or reconnect the plug connections of the motor cables on the control unit and on the drives Check or reconnect the plug connection on the control unit Reduce weight Control unit reactivates automatically after about 3 minutes CAUTION! The max. movement time of 2 minutes is only available again after a rest period of min. 18 minutes. Contact customer services Contact customer services Replace control panel see Initialisation, page 16 Reduce weight Check or reconnect the plug connections of the motor cables on the control unit and on the drives Contact customer services 22

23 ERROR MESSAGES ON THE DISPLAY OF THE CONTROL PANEL (OPTIONAL) Display Cause Remedy HOT The control unit monitors the operating time (timecontrolled) and its max. temperature. A value has been exceeded. Wait until the control unit has cooled down and the "HOT" message on the display disappears. The table is then ready for use again. E00 M1 - Internal error Disconnect the mains plug! E01 M2 Internal error Contact customer services. E02 M3 Internal error E12 E13 M1 defect M2 defect Disconnect the mains plug! Remedy the external short circuit, check the cables to the motors for possible damage or Plug the correct motor into the affected socket. Reactivate the control unit. E24 E25 M1 overcurrent M2 overcurrent Collision? -> Rectify if necessary max. load exceeded -> remove the load from the table. If the fault persists after that, contact customer services. E36 M1 Not connected Motor not connected. E37 M2 Disconnected Check cable / plug connection to the motors and perform reset E48 Overcurrent Motor Group 1 E55 Motor Group 1 synchronisation lost Collision? -> Rectify if necessary max. load exceeded -> remove the load from the table. Motor position too different Reduce load on the table if necessary. Reinitialise (RESET) table. E60 Collision detected optional ISP and sensor function. Remove cause. E61 Motor replaced Connection to the motor has been interrupted or a new motor connected. Reinitialise (RESET) table. E62 Overcurrent Control unit Total overcurrent, overload E63 External sensor or cable not connected External anti-crush bar or other add-on module not connected, check connector if necessary. E64 Authentication error Reinitialise (RESET) table E65 Overcurrent and short If errors occur during movement. circuit Collision? Load too heavy? 23

24 Display Cause Remedy E67 Overvoltage Disconnect the mains plug! Contact customer services. Mains or power supply fluctuations? E70 Change in the drive configuration Unplug and wait min. 5 seconds, then reinitialise the table (RESET) E81 Internal Error Reinitialise (RESET) table. Unplug the power cable for a few seconds then plug in again. If this error occurs regularly, disconnect the power cable and contact customer services. (Motor = drive in the mounting column or in the side base) Note: The Power Fail Detection of the motor control unit detects power failures and saves all relevant data before the voltage drops below a critical level. In a few exceptional cases, the data cannot be saved and the next time the control unit is turned on, the display will show E81 and the control unit will click three times. To correct this error, a manual reset is required (See Initialisation / reset section). Note: If a power failure occurs or the power cable is pulled out during height adjustment, a manual reset may be necessary. If you cannot resolve an error as described, unplug the power cord, wait a few minutes, and try to initialise the table again! If an error persists even after that, disconnect the table from the mains and contact customer services. This list of errors is compatible with firmware and above! For older firmware versions, ask us for a separate list of errors if necessary. 24

25 CONTROL UNIT CLICK CODES Once the motor control unit is supplied with power, the control unit uses the built-in relay to acoustically inform the user about the system status and the reason for the last shutdown. Number of clicks 2x 1x 3x 6x When when mains on Status information Normal operation: The system is working without problems Emergency operation: The system is in emergency mode, the drives cannot be used. Check the LEDs if present and / or the error code on the display of the control panel. Last shutdown incomplete / Forced reset: Check the LEDs if present and / or the error code on the display of the control panel. 25

26 TECHNICAL DATA Drive system with SMART motor control unit General Supply voltage V / Hz Nominal voltage V / Hz Standby power at nominal voltage, primary (typical) 0.3 W Ambient temperature during operation 0-30 C Permissible relative humidity (for operation) 5-85% (non-condensing) Storage and transport temperature -40 C to +85 C Permissible relative humidity (for storage) 5-90% (non-condensing) Protection class I IP class IP 20 Max. operating time 10% (2 min. on / 18 min. off) Nominal lifting speed of drive columns (decreases under 38 mm/s max. load) Single drive (mounting column or side base, support foot) with SMART-e-2 Lifting force max. 600 N ( 60 kg) Stroke length depending on version see diagram Power consumption max., primary 216 W Table frame with 2 drives (mounting columns or side panels) with SMART-e-2 Lifting force max. (incl. weight of table top) 1000 N ( 100 kg) Stroke length depending on version see diagram Power consumption max., primary 216 W 26

27 TESTS AND CERTIFICATES The drive system is tested in accordance with: Electromagnetic compatibility (EMC Directive 2004/108/EC) EN :2005 Electromagnetic compatibility (EMC) EN : A1 Electromagnetic compatibility (EMC) EN : A1 +A2 Electromagnetic compatibility (EMC) EN :2008 Electromagnetic compatibility (EMC) Electrical Safety (Low Voltage Directive 2006/95/EC) EN :2012 Safety of electrical appliances for household and similar purposes Safety-related parts of control systems EN ISO :2008 Safety of machinery Safety-related parts of control systems Performance level "b" Please save this operating manual for future needs. 27

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