Circuit diagram. Inteded use. Function

Transcription

1 SNA 4043 K SNA 4063 K SNA 4044 K SNA 4064 K Basic unit for emergency stop and guard door applications Basic unit as per EN and EN ISO For safety category 4 and stop category 0 Single or twin channel control With or without cross short detection Reset, manually monitored SNA 406xK or automatic SNA 404xK 4 release current circuits SNA 40x4K or 3 release current circuit, 1 signal generator current circuit SNA 40x3K Equipment versions SNA 40xxK SNA 40xxK-A SNA 40xxK-C SNA4043K, SNA4063K SNA4044K, SNA4064K with screw terminals, fixed with screw terminals, plug-in with spring force terminals, plug-in Circuit diagram Inteded use The SNA 40xxK is a safety switch unit. It must only be used as part of the protection devices on machines for the purpose of personal, material and machine protection. It may only be used by competent persons and only on the machine where it has been fitted and commissioned by a competent person in accordance with the operating instructions. In the event of any other use and in the event of modifications to the unit - even in the framework of fitting and installation - any claim under warranty against Schleicher Electronic GmbH & Co. KG becomes invalid. The user must carry out a risk assessment in accordance with DIN EN ISO On this basis you must carry out validation of the entire installation/ machine in accordance with the applicable standards The quoted performance level (PL) is only reached if an average number of switching cycles per year is not exceeded, depending on the loading of the unit (EN ISO Table C.1) and the specific application (EN ISO , C.2.4 and Table K.1). Using an assumed B 10d value for maximum load 400,000 we get, for example, a maximum cycle number of 400,000 / (0.1 x 30) = 133,333 switching cycles/year. Function LED display Significance SUPPLY (green) Supply voltage is present K1 (green) Current circuit K1 switched K2 (green) Current circuit K2 switched Terminal allocation Allocation Description A1 Supply voltage U B+ A2 Supply voltage GND S V DC (control voltage) S21 0 V DC (control voltage) S12 + input circuit 1 (K1) S52 + input circuit 2 (K2) S22 input circuit 2 (K2) Manually monitored or automatic reset Release current circuit Release current circuit Release current circuit Release current circuit 4, SNA 40x4K Signal generator current circuit, SNA 40x3K The inputs to the safety relay are prepared for connecting the safety sensors listed in the section "Areas of application for the unit". Two separate input circuits control the internal relays. The release current circuits are designed as safe outputs. Setting up an emergency stop device according to stop category 0 is possible (EN 62061). The unit corresponds to category 4 for safety-relevant parts of control systems (EN ISO ). Functional description: Opening the input circuits causes the release current circuits to open immediately and the signal generator current circuit to close, if available. SNA 406xK, manual monitored reset: Closing the input circuits does not cause the current circuits to close immediately as this only happens when the reset button is pressed. The reset is performed with a rising edge. SNA 404xK, automatic reset: Closing the input circuits causes the current circuits to close immediately if the feedback circuit is closed. This function must be implemented using a corresponding switching circuit. Cross short detection: If the input circuits are switched across two channels, a cross short is detected if they are switched with a different polarity. Contactor monitoring: The contactor monitoring monitors the switched gates controlled by the release current circuits (e.g. motor contactors). The release current circuits close via the wiring on the signaling contacts of the switched gates connected in series to the feedback input, but only when all the switched gates are open. This monitoring only becomes active in reset. Page 4

2 SNA 406xK, manual monitored reset Functional diagrams A1 / A2, LED SUPPLY S12, LED K1 S52/S22, LED K2 13/14, 23/24, 33/34 (SNA 4063), 43/44 (SNA 4064) 41/42 (SNA 4063) SNA 404xK, automatic reset t A2 t B t M t R t W = response time = delay time = minimum switch-on time = fallback time = time required to be ready for operation again A1 / A2, LED SUPPLY S12, LED K1 S52/S22, LED K2 13/14, 23/24, 33/34 (SNA 4043), 43/44 (SNA 4044) 41/42 (SNA 4043) t A2 t R t W = response time = fallback time = time required to be ready for operation again Input switching Single channel operation The safety sensor is connected between S11 and S12. Connect a wire bridge between S12 S52 and S21 S22. Connect a wire bridge between S11 S52. Twin channel operation with cross short detection The two isolated switching elements on the safety sensor must be connected between S12 S52 or S21 S22. Connect a wire bridge between S11 S52. If there is a short circuit in the lines leading to the emergency stop button, the voltage applied to S11 and S21 is shorted (cross short detection). Relays K1 and K2 switch back to standby position, the release current circuits open and the electronic fuse triggers. Derating Max. total current I² of all current circuits depending on the ambient temperature DC devices AC devices Note: Diagram applies to max. operating voltage U O. Observe the max. steady current per current path I n! The diagram does not apply to UL/CSA applications! Observe I sum! Function test Function test with manual reset If the safety sensor is not actuated (e.g. emergency stop not pushed) and if the supply voltage is present, the unit is ready (LED SUPPLY lights up). After pressing the reset button, close the release current circuits (LED K1 and LED K2 light up). Actuating the sensor causes the release current circuits to open (LED K1 and LED K2 switch off immediately). Function test with automatic reset If the safety sensor is not actuated (e.g. emergency stop not pushed) and if the supply voltage is present, the release current circuits close (LED SUPPLY, LED K1 and LED K2 light up). Actuating the sensor causes the release current circuits to open (LED K1 and LED K2 switch off immediately). Regular testing of the protection equipment by competent persons Test the installation in accordance with the applicable national regulations at the intervals quoted therein. This is to show any changes to the machine or manipulation of the protection equipment since initial commissioning. Each safety application must be tested at the time intervals that you have stipulated. The effectiveness of the protection equipment must be checked by competent and appointed persons. If changes have been made to the machine or the protection equipment or if the safety relay has been replaced or repaired, you should test the installation again. Areas of application for the unit The safety relay SNA 40xxK can be used in accordance with EN to SILCL3 in accordance with EN ISO to PL e and Category 4 The actual performance level achieved and the safety category as per EN ISO depends on external switching, execution of the wiring, selection of command generator and its setup on the machine. The relevant actuators on the machine or plant can be safely deactivated via the touch-sensitive switching outputs on the safety relay. The safety relay was designed exclusively for use in conjunction with isolated safety sensors such as: emergency stop buttons (EN ISO ): single channel, twin channel, safety locking devices (EN 1088): single channel, twin channel Page 5

3 Technical data SNA 40xxK Supply circuit, (A1,A2) Minimum Typical Maximum Input voltage, AC/DC 20.4 V 24 V 26.4 V Ripple U pp 2.4 V pp at U N 1.6 W / 2.9 VA Peak current IPeak 1.5 A Operating voltage U O AC V AC 35.7 V AC 52.8 V 2.3 W / 2.6 VA Operating voltage U B AC V AC 97.8 V AC V 2.2 W / 2.5 VA Operating voltage U B AC 230 V AC V AC 253 V 2.1 W / 2.4 VA Device fuse T 0.5 A Nominal AC frequency 50 Hz 60 Hz Control voltage (S11, S21) Control voltage 22 V DC 40 V DC Short circuit behavior Short circuit proof without fail Input circuits S12, S52/S22, Input voltage, U I 19.2 V 26.4 V Input current S12/S52 25 ma 100 ma Fallback time, t F 10 ms Interruption time of Ue (test pulses) 1 ms Duration of interruption time 25 ms Reavailability time (t R) 750 ms Availability time (), t A 350 ms Response time of reset button (), (t R1) 150 ms 350 ms Response time of reset button (), (t A2) 50 ms 100 ms Minimum actuation time (), (t M) 100 ms Output circuit relay contacts (NO contacts, 13/14, 23/24, 33/34 <SNA 40x3K>, 43/44 <SNA 40x4K>) Release current circuits (NO contacts) 3,4 positively guided Signal generator current circuit (NC contact, not secure, SNA 40x3K) 1, positively guided Steady current per current circuit I n 8 A Steady current per current circuit I n for UL/CSA application 6 A Total current Itot See diagram 1 Total current Itot for UL/CSA applications 12 A Switching voltage U n 300 V Switching load 2000 VA Use category as per DIN EN AC-15 U e 230 V AC, I e 5 A / DC-13 U e 24 V DC, I e 5 A Limited short circuit current 450 A Contact fusing, gg max. 8 A Mechanical service life (cycles) 10 7 switching cycles Operating data Contact protection (EN ) Rated surge voltage Over-voltage category Contamination level Rated voltage Test voltage U eff 50 Hz as per DIN EN kv II 3 external, 2 internal 300 V AC 2 kv Protection rating housing/terminals as per DIN EN IP 40 / IP 20 Ambient/storage temperature -25 C to +55 C / -25 C to +75 C Terminal and connection data Screw terminals Spring-loaded terminals Single core or fine wire 1 x mm² / 2 x mm² 2 x mm² Stripped length max. 8 mm Fine wire with core ferule as per DIN x mm² / 2 x mm² 2 x mm² Permitted tightening torque Max. 0.6 Nm Weight of DC devices / AC devices 0.21 / 0.25 kg General system data Safety integration level SIL3 (IEC 61508), SILCL3 (EN 62061) Category Category 4 (EN ISO 13849) Performance Level PL e (EN ISO 13849) B 10d value (relay) AC-15, 230 V, I = 5 A switching cycles DC-13, 24 V, I = 2 A I = 2 A 2 x 10 8 switching cycles 7 x 10 8 switching cycles PFHd (average probability of a hazardous failure per hour) 1) 3 x 10 8 T M (service life) 20 years (EN ISO 13849) Stop category 0 (EN 62061) Page 6

4 Overview of devices / Part numbers Type Rated voltage Terminals Part no. SNA 4043K AC V 50-60HZ screw terminals, fixed R AC 230V 50-60HZ R AC 42-48V 50-60HZ R AC/DC 24V 50-60HZ R SNA 4043K-A AC V 50-60HZ screw terminals, pluggable R AC 230V 50-60HZ R AC 42-48V 50-60HZ R AC/DC 24V 50-60HZ R SNA 4043K-C AC/DC 24V 50-60HZ spring terminals, pluggable R SNA 4044K AC V 50-60HZ screw terminals, fixed R AC 230V 50-60HZ R AC 42-48V 50-60HZ R AC/DC 24V 50-60HZ R SNA 4044K-A AC V 50-60HZ screw terminals, pluggable R AC 230V 50-60HZ R AC 42-48V 50-60HZ R AC/DC 24V 50-60HZ R SNA 4044K-C AC/DC 24V 50-60HZ spring terminals, pluggable R SNA 4063K AC V 50-60HZ screw terminals, fixed R AC 230V 50-60HZ R AC 42-48V 50-60HZ R AC/DC 24V 50-60HZ R SNA 4063K-A AC V 50-60HZ screw terminals, pluggable R AC 230V 50-60HZ R AC 42-48V 50-60HZ R AC/DC 24V 50-60HZ R SNA 4063K-C AC/DC 24V 50-60HZ spring terminals, pluggable R SNA 4064K AC V 50-60HZ screw terminals, fixed R AC 230V 50-60HZ R AC 42-48V 50-60HZ R AC/DC 24V 50-60HZ R SNA 4064K-A AC V 50-60HZ screw terminals, pluggable R AC 230V 50-60HZ R AC 42-48V 50-60HZ R AC/DC 24V 50-60HZ R SNA 4064K-C AC/DC 24V 50-60HZ spring terminals, pluggable R Dimension diagram SNA 40xxK SNA 40xxK -A SNA 40xxK -C Page 7

5 Application example (SNA 4044K) Twin channel EMERGENCY STOP application (cross short detection) with automatic reset The twin channel emergency stop switching is equipped with an automatic reset. Terminals S12 and must be connected to enable the automatic reset. The automatic reset is activated if the emergency stop button is not pressed. If the emergency stop button is pressed, the device switches back to standby and the release current circuits 13/14, 23/24, 33/34, 43/44 open immediately. If the emergency stop button is unlocked again, the SNA 4044K is activated by the automatic reset. External contactors are activated via two of the release current circuits on the SNA 4044K. The function of the external contactors is monitored by the relevant NC contact. The NC contacts must be connected in series in the feedback circuit S12/. Note: An unmonitored manual reset with reset button can be connected in the feedback circuit. Application example (SNA 4063K) Twin channel emergency stop application (cross short detection) with manual reset and reset button monitoring. The application example is with reset button monitoring. The device is released when the reset button is pressed (terminals S11/ rising edge). The twin channel emergency stop switching is also deactivated if one of the two contacts on the emergency stop button does not open. If a fault occurs (e.g. the emergency stop contact on S22 does not open), the safety circuit is activated by the second (redundant) contact S12. Release current circuits 13/14, 23/24, 33/34 open immediately. During periodical self tests, the reset button is used to detect a contact between lines and prevents the release current circuits from interconnecting. Page 8