T401 - T402 Operating Instructions 383E-64618
Contents
1. Warning A new configuration only becomes effective after the parameters have been downloaded from the PC into the T401 T402 EEPROM T400 Write Parameters 6 3 1 Machine Factor Configuration System Machine Factor After the input of a Machine Factor M f n e with f Hz signal frequency of the speed transmitter at a determined machine speed and n rpm machine speed The limits for the frequency relay and the measuring range for the frequency current converter can be entered directly in rpm 6 3 2 Minimum Measuring Time Configuration System Fix Time The minimum measuring time determines the minimum time during which the input frequency is measured By choosing a longer minimum measuring time frequency jitter is filtered out but that also results in a delayed response to a step change 6 3 3 Minimum Displayed Measured Value Configuration System Min etc For an input frequency below the minimum displayed measured value the measured value displayed on the PC shows 0000 6 3 4 Definition of the Alarm Configuration System Alarm Definition This function allows for the selection of only a system error or also a sensor current outside the defined limits of min and max During an Alarm the OK LED is off and the Alarm on the PC is shown as active 6 3 5 Sensor Current Minimum Configuration Sensor Current Min As long as the sensor current consumption is a2. 25 mA This supervision is activated when active sensor type is activated Monitoring of passive electromagnetic VR Mag Pick Up sensors open circuit state of passive sensors This supervision is activated when passive sensor type is activated Both monitoring functions can be switched off via the configuration SW status 2 3 2005 5 18 Operating instructions T401 T402 JAQUET LTD Binary input For external selection between two sets A B of programmable relay controls and acknowledge functions No external pull up needed active low U lt 1 5V Relay control parameter set B high open U gt 3 5V Relay control parameter set A Common reference potential with negative pole of sensor supply The simple method to activate the binary input is to short circuit the Bin input with the sensor supply reference OVS Data communication Serial interface similar to EIA RS 232 but with a 5V CMOS level 3 pole 3 5 mm stereo headphone connector on front side common reference potential with negative pole of sensor supply Power supply T401 T402 10 36 VDC Power consumption max 10V 2 3W 24V 2 6W 36V 3W maximum allowable power supply interruption with 16V 4ms 24V 25ms 36V 75ms Climatic conditions KUE according to DIN 40 040 Operating temperature 40 85 C Storage temperature 40 90 C relative humidity 75 average over a year up to 90 for 30 days max condensation is t
3. Limits switch into the position corresponding to the measured value If there is no input frequency after a time of 2 sec 2 period of 1 Hz the relays switch assume the state corresponding to measured value below Limit low The delay time is zero if there is no binary input selected or if the selected binary input is not activated In that case the relays are instantly under control of parameter function A 7 2 Measuring Each measurement starts with a positive edge of the frequency input signal After the selected Fix Time has elapsed the next positive edge of the input signal finishes the actual measurement and simultaneously starts the next measurement The total resultant measurement time is computed with a resolution of 0 4 us The calculation and control of the outputs immediately takes place at the beginning of the next measurement Transmission and display ofthe measured values and states on the screen of the PC are accomplished once during each display interval For input frequencies out of range the analog output goes to the corresponding extreme value status 2 3 2005 11 18 Operating instructions T401 T402 JAQUET LTD 7 3 Behaviour with activated Hold Function Acknowledge Hold Function with relay function normal and with simultaneous selection of Relay is held if active inactive If the input frequency goes above the upper limit value or below the lower limit value the relay changes it
4. JAQUET TECHNOLOGY GROUP T401 T402 Operating Instructions 383E 64618 Frequency Measurement and Switching Instruments Series T400 berreicht durch present by SCHRIEVER amp SCHULZ amp Co GmbH Vertriebsb ro f r Mess amp Regeltechnik seit 1958 Eichstr 25B gt D 30880 Laatzen Tel 49 0 511 864541 Fax 49 0 511 8641 56 schriever schriever schulz de www schriever schulz de T401 One Channel tachometer with relay and 0 4 20 mA output 383Z 05307 T402 One Channel tachometer with relay and 0 2 10 V output 383Z 05308 Operating instructions T401 T402 Contents 1 SAFETY INSTRUCTIONS 2 FUNCTIONAL PURPOSE 3 SPECIFICATIONS 4 PRINCIPLE OF OPERATION 5 INSTALLATION 6 CONFIGURATION WITH PC SOFTWARE AND OPERATION 6 1 Software Concept 6 2 List of Parameters and Text Displays 6 3 Parameters 6 3 1 Machine Factor Configuration System Machine Factor 6 3 2 Minimum Measuring Time Configuration System Fix Time 6 3 3 Minimum Displayed Measured Value Configuration System Min etc 6 3 4 Definition of the Alarm Configuration System Alarm Definition 6 3 5 Sensor Current Minimum Configuration Sensor Current Min 6 3 6 Sensor Current Maximum Configuration Sensor Current Max 6 3 7 Measuring Range Starting Value Configuration Analog Output 6 3 8 Measuring Range End Value Configuration Analog Output 6 32 9 Output Range Configuration Ana
5. Time of 2 5 10 20 response 50 100 200 500 ms 1 2 5 second For input frequencies with a period shorter than the Fix Time maximum 2 Fix Time max period of the input frequency 7 5 ms typical Fix Time 1 period of the input frequency 7 5ms For input frequencies with a period longer than the Fix Time Maximum period of the input frequency 7 5ms Hysteresis of setpoints For each limit an upper and a lower setpoint may be set independently Relay functions Monostable change over contacts relay function individually selectable as normal or inverse and without or with acknowledge resp hold via binary input Relay output AC Load max 250 VAC 1250VA DC Load ar DC load breaking capacity Ste H So E 10 5 10 20 Ti DC current A 0 05 referred to the setpoint Temperature tolerance Max 10 ppm Time delay The minimum measuring time is programmable as a one period or a Fix Time of 2 5 10 20 50 100 200 500 ms 1 2 5 second For input frequencies with a period shorter than the Fix Time the delay time is maximum 2 Fix Time max period of the input frequency 10 5 ms typical Fix Time 1 period of the input frequency 10 5 ms For input frequencies with a period longer than the Fix Time the delay time is maximum max period of the input frequency 10 5 ms Open Collector out
6. am of the ear phone connector on the instrument displays the names with respect to the instrument port The instrument s RXD has to be connected with the PC s TXD and vice versa The T401 T402 instrument does not generate the standard RS 232 signal 12 12V Instead RXD has a 5V CMOS level which is compatible with most PCs as long as the cable length is below 2 m status 2 3 2005 13 18 Operating instructions T401 T402 JAQUET LTD 8 Mechanical Construction Housing The housing consists of a frame in front with terminals and a protective cover with fixing elements for mounting rails Internally the terminals have connectors with the mating part soldered onto the PCB This allows the terminals to unplugged plugged for easier connection Housing Material Lower part and terminal frames made out of Makrolon 2800 UL 94 V 2 green on rails according to EN 50 022 35 and DIN 46 277 AWG 24 AWG 12 Protection acc to EN Housing IP 40 Terminals IP 20 resp IEC 925 Dimensions i anf an Sp i et s Il are N y Na 72 i Pa status 2 3 2005 14 18 Operating instructions T401 T402 JAQUET LTD 9 Connection diagrams Sh OVs Sign Col V Bin IQ Emit JAQUET Tee T7401 2 HNOLOGY GRAUP NC NO COM 24V OV PE Sensor interface SH Screen for the sen
7. between the signal frequency f of a speed sensor and the rotational speed n of a pole wheel is the following f n p 60 with f Frequency of the speed transmitter in Hz n Rotational speed of the pole wheel in rom p Number of poles on the pole wheel Consequently for rotational speed measurement the machine factor M p 60 Instead of the rotational speed n any frequency proportional physical quantity to be measured may be used in the above formula For the two limits on the frequency relay the switch on point Limit high and the switch off point Limit low can be entered separately thus allowing for the realisation of practically any hysteresis With the binary input connected to OV low relay control parameter set B is active With the binary input left open high relay control parameter set A is active Hold Function When selected if the input frequency goes above the upper limit value or below the lower limit value the relay changes its state and will be held in this state unless it is reset even if the input frequency later goes below the upper or above the lower limit value The configuration of the Relay Control Selection of Actuator allows the relay s hold function to be independently selected for both parameter sets A and B activate de activate gt upper limit value or lt lower limit value The relay is reset by momentarily opening and closing again of the binary input if param
8. bove the value min the sensor is considered to be working properly status 2 3 2005 9 18 Operating instructions T401 T402 JAQUET LTD 6 3 6 Sensor Current Maximum Configuration Sensor Current Max As long as the sensor current consumption is below the value max the sensor is considered to be working properly 6 3 7 Measuring Range Starting Value Configuration Analog Output The measuring range starting value Zero is the value corresponding to the starting value of the output range e g 0 mA 6 3 8 Measuring Range End Value Configuration Analog Output The measuring range end value Full Scale means the value corresponding to the full scale value of the output range e g 20 mA For a falling transfer function the measuring range end value has to be choosen smaller than the measuring range starting value 6 32 9 Output Range Configuration Analog Output For standard converters this range is normally set to 0 20 mA or 0 10V A different output range may be selected out of the menu according to the option of the instrument 6 3 10 Time Constant Configuration Analog Output At the time of delivery the time constant for the current output is set to 0 In order to smooth out variations on the analog output signal the selection of a larger time constant allows the activation of a software lowpass filter with the selected time constant 6 3 11 Status of
9. defect agreed upon by JAQUET within a period of 12 twelve months from date of delivery Travelling and labour costs are excluded from the guarantee The guarantee does not cover any damage due to misuse or to improper handling Complaints due to visible defects are only accepted if adressed to JAQUET within 14 days after receipt of the goods Ihr kompetenter Ansprechpartner Your competent contact partner SCHRIEVER amp SCHULZ amp Co GmbH Ing und Verkaufsb ro seit 1958 Eichstr 25B D 30880 Laatzen Tel 49 0 511 864541 Fax 449 0 511 864156 www schriever schulz de schriever schriever schulz de
10. e device behaviour depends on the software configuration See table below In case of sensor ffailure the output behaviour depends on the configuration Alarm configuration Outputs System System or Sensor LED Analog output Relay 0 20mA 10V 4mA 2V 20mA 10V X On depending on configuration and sensor signal X Off 0mA 0V OmA OV De energized 7 4 1 System Alarm If the microprocessor detects a RAM ROM or EEPROM Checksum error the measured value is set to 0 rpm and the output goes to its lowest level OmA or 4mA or OV or 2V and the relays get deenergized 7 4 2 Power Failure For power supply interruptions longer than the maximum allowable time the analog output will go to OmA resp OV and the relays become deenergized When the supply voltage returns above the specified minimum level the instrument will go through its initialization routines according to paragraph Power on A break down of the internal supply voltage due to a power supply voltage below the specified minimum level will be detected as a power failure status 2 3 2005 12 18 Operating instructions T401 T402 JAQUET LTD 7 5 Communication with the PC Any communication via the serial RS 232 interface is initiated by the PC Transmission speed 2400 Baud Parity Bit none Data Bits 8 Stop Bits 2 Connector Type 3 5mm stereo headphone Connection Diagram GND TXD RXD The connection diagr
11. e of to 10 seconds T400 Start Reading Mesure Data 7 Operating 7 1 Power on Analog Output After power on the output corresponds to the value determined as measuring range starting value until the first measurement has been completed Relay outputs with binary input not activated After power on the relays stay deenergized or they assume the state defined under Relay selection The first positive edge of the input signal starts the first measurement interval After completion of the first measurement those relays which are related to Limits switch into their corresponding position If there is no input frequency after a time of 2 sec 2 period of 1 Hz the relays switch into the state corresponding to lt setpoint low if 1 Hz is defined as minumum indicated measuring value Relay outputs with binary input originally activated not yet implemented After power on the relays stay deenergized or they assume the state defined under relay selection parameter function B An eventually defined bridging time is only starting when the binary input is deactivated e g is opened During this time the relays are still controlled by the parameter function B After this time has elapsed the relays assume the state defined under the parameter function A The first positive edge of the input signal starts the first measurement interval After completion of the first measurement those relays which are related to
12. eter set B is activated resp by momentarily closing and opening again of the binary input if parameter set A is activated for a time between 0 1 0 3 s If the binary input is opened resp closed for a time longer than 0 3 s the parameter set A resp B will go active and the communicated values also displayed on the PC and the relay will go to the actual state corresponding to the parameter set A resp B The input of all measuring parameters is made by the user the manufacturer or the supplier via a PC and the RS232 interface according to order specifications All parameters are stored independent of the power supply by an EEPROM The green LED on the front only indicates whether the instrument is working correctly LED bright or is in error LED dark status 2 3 2005 7118 Operating instructions T401 T402 JAQUET LTD 5 Installation The instrument shall be used only when mounted firmly and the supply line shall contain a switch or another adequate means for disconnection from power Before switching on the apparatus make sure the power supply is in the specified range The shield of the sensor cable should be connected to terminal Sh for reasons of electromagnetic compatibility This is internally connected to protective earth PE and to the negative pole of power supply 6 Configuration with PC Software and Operation 6 1 Software Concept Parameters are entered from a per
13. immediately disconnected and returned to the manufacturer for repair 2 Functional Purpose T400 tachometers measure and monitor frequencies speed proportional values within the range 0 to 35 000 Hz The family consists of the two types e T401 One channel frequency current converter with output 0 4 20 mA and switching limit with relay Article No 3832 05307 e T402 One channel frequency voltage converter with output 0 2 10 V and switching limit with relay Article No 383Z 05308 3 Specifications Reference conditions ambient temperature 20 C power supply voltage within specifications Bandwidth T401 T402 Lowest Measuring Range 0 1 000 Hz Highest Measuring Range 0 35 00 kHz Measuring range and setpoints are entered directly in physical units e g rpm after the determination of the Machine Factor M frequency Hz measured value rpm sc EEE Execution T401 0 20 mA resp 4 20 mA Current output selectable for rising or falling transfer function Maximum Load 500 Ohm corresponding to a maximum of 10 V Execution T402 0 10V resp 2 10V Voltage Output selectable for rising or falling transfer function Minimum Load 7 kOhm corresponding to a maximum of 1 4 mA Maximum open circuit 12V Voltage 0 5 referred to the analog output end of range value status 2 3 2005 3 18 Operating instructions T401 T402 JAQUET LTD Response Time step The minimum measuring time is programmable as a Fix
14. log Output 6 3 10 Time Constant Configuration Analog Output 6 3 11 Status of the Setpoints Limits Configuration Relay Control 6 3 12 Mode of Operation of the Setpoints Limits 1 and 2 Configuration Limits 6 3 13 Relay Control Configuration Relay Control 6 3 14 Selection of the Display Intervall Settings Display Interval 7 OPERATING 7 1 Power on 7 2 Measuring 7 3 Behaviour with activated Hold Function Acknowledge 7 4 Sensor Failure 7 4 1 System Alarm 7 4 2 Power Failure 7 5 Communication with the PC 8 MECHANICAL CONSTRUCTION HOUSING 9 CONNECTION DIAGRAMS 10 HARDWARE CONFIGURATION 11 MAINTENANCE REPAIR 12 WARRANTY 13 DECLARATION OF CONFORMITY JAQUET LTD vovovovoeo m 0 N WW W status 2 3 2005 2 18 Operating instructions T401 T402 JAQUET LTD 1 Safety instructions Certain components within the T401 T402 tachometers are only under dangerous voltages if the connected circuits have dangerous potentials The instruments comply with Protection Class Hence it is mandatory to connect a protective earth on the PE terminal The instruments are designed and manufactured according to IEC Publication 348 and they left the works in perfect condition These operating instructions contain information referring to risks which must be strictly adhered to for safe operation of the instrument Instruments in a doubtful condition after electrical climatic or mechanical overload must be
15. me constant 0 0 9 9s Configuration lt Limits gt Status of operation On relay status depends on the corresponding limit Off limit is inactive resp the relay is deenergized Mode of operation Normal Inverse status 2 3 2005 8 18 Operating instructions T401 T402 JAQUET LTD Lower setpoint of limit 1 e g 200 00 Hz min value 0 1Hz Upper setpoint of limit 1 e g 300 00 Hz max value 35kHz Lower setpoint of limit 2 e g 400 00 Hz min value 0 1Hz Upper setpoint of limit 2 e g 500 00 Hz max value 35kHz Configuration lt Relay selection gt Selection A B start activation None always selection A Binary input Delay 0 2 000 s Selection A Alarm Sensor monitoring Limit 1 Limit 2 Window On Off Selection B Alarm Sensor monitoring Limit 1 Limit 2 Window On Off Alarm the relay depends only on alarm defined under lt System gt Sensor monitoring the relay depends also on sensor current limits defined under lt Sensor gt Limit the relay depends on setpoints defined under lt Limit gt Window the relay depends on the measured value within or out of the Window defined by limits 1 and 2 On the relay is always energized Off the relay is always deenergized Acknowledge A resp B without no hold function relay is hold if control is inactive 6 3 Parameters Parameter configuration is via the RS232 interface by selecting the required programme menu and changing the appropriate parameters
16. o be avoided Insulation Galvanic separation between power supply current output and the sensor power supply Isolation 700 VDC 500VAC Relay contact isolation 1500 VAC Compatibility Radiated emissions EN 55011 Electro Magnetic Immunity in accordance with international standards and EN 50082 2 Compatibilit Conducted high frequency IEC 61000 4 6 3V eff 130 dBuV 10kHz 80 MHz AM 80 1000Hz sinuswave power lines Pulse modul Elec field ENV 50140 900 MHz 100 pulse mod 200Hz gt 10V m Power frequency magnetic IEC61000 4 8 50Hz 100 A m 2 minutes field Standards EN 50155 API 670 GL IEC 61508 SIL 2 status 2 3 2005 6 18 Operating instructions T401 T402 JAQUET LTD 4 Principle of Operation T400 tachometers are controlled by a microprocessor They work according to the period measurement principle with subsequent computing of the reciprocal value computer principle The frequency is measured continuously The number of cycles considered for one measurement depends on the minimum measuring time Fix Time and the level of the input frequency respectively on the limits to be monitored After entering the Machine Factor M f n with f Hz signal frequency of the speed transmitter at a determined machine speed and n rpm machine speed the limits for the frequency relay and the measuring range for the frequency current converter can be entered directly in rpm The relation
17. put S O Insulation status 2 3 2005 4 18 Operating instructions T401 T402 JAQUET LTD Sensor input Sensor monitoring Reference potential floating galvanically separated from power supply and the outputs especially the current voltage output The terminal for the cable shield is galvanically connected to the minus pole of the sensor supply Input resistance 30 kOhm Built in sensor power supply 14 V max 35 mA short circuit proof in case of activation of the protection the circuit must be opened in order to rearm the protection Built in Pull up 14 V resistor 820 Ohm for connection of two wire transmitters J1 must be set on position 2 see chapter 10 Frequency range 3dB 0 01 Hz 35 kHz Trigger level adaptive Trigger level approximately Vin peak 4 with minimum 500 mV factory configuration and maximum value 5V The minimum value of the trigger level can be set down to 20 mV by moving strap J2 Minimum trigger level depending on the input signal Frequency Trigger level Vpeak Frequency Hz Monitoring of powered active sensors 2 and 3 wire sensors selection via strap 1 with a current consumption lt I min resp gt max will be signalled defective according to behaviour description in chapter Sensor Failure 0 5 mA lt I min lt 25 mA 0 5 mA lt max lt
18. s in sets A and B may be defined independently With the modes of operation for Limits 1 and 2 identical e g both normal or both inverse the relay control function Window energizes the relay only when the measured value lies between the two Limits 1 and 2 With different modes of operation for Limits 1 and 2 e g one normal and the other inverse the relay is deenergized if the measured value lies between the two Limits 1 and 2 The binary input on the frequency relay is used for selecting between parameter set A and B but it may also be used for resetting the relay if a hold function is selected Once the relay control has been activated the relay status no longer changes irrespective of the input frequency The relay may however be reset by momentarily opening resp closing the binary input for 0 1 to 0 3 s As soon as there is an alarm active measurements are stopped and the relay is deenergized independent of status 2 3 2005 10 18 Operating instructions T401 T402 JAQUET LTD the selected acknowledge function After the disappearance of the error resp alarm status the acknowledge function only considers the last correct measured value Any violation of limit values during alarm are not considered 6 3 14 Selection of the Display Intervall Settings Display Interval The refresh cycle for the display of measured values and states on the PC can be selected in the rang
19. s state and will be held in this state unless it is reset even ifthe input frequency later goes below the lower resp the upper limit value The LED displays only whether the instrument is working correctly LED bright or is in error LED dark The relay is reset by momentarly opening and closing again of the binary input if relay control parameter set B is activated resp by shortly closing and opening again of the binary input if relay control parameter set A is activated for a time between 0 1 0 3s If the binary input is opened resp closed for a time longer than 0 3 s the relay control parameter set A resp B becomes active and the values communicated displayed on the PC and the relay and the LED will without further resetting via the binary input or by power on reset go to the actual states corresponding to the relay control parameter set A resp B 7 4 Sensor Failure For active sensors with amplifiers sensor failure detection is based on current consumption monitoring For these sensors a loss of the sensor signal sets the output of T401 T402 to the 0 rpm state If false current consumption is detected the sensor failure flag is set and the device behaviour depends on the software configuration See table below For passive electromagnetic sensors sensor failure detection is based on open circuit state detection If this state is detected the sensor failure flag is set and th
20. sonal computer PC via the serial RS 232 interface by means of a self explanatory user friendly programme menu Several forms and tables allow for the easy selection from a choice of functions or parameters To activate comms settings Interface select COM1 6 2 List of Parameters and Text Displays If you already have the configuration file you can open it using the T400 windows software to view the parameters Alternatively connect a unitand go to T400 Read Parameters to interrogate the T400 you have Normal windows file handling applies You can print the parameters set out via File Print Factory activated parameters respectively their values are indicated in bold letters Instrument type Manufacturing code Software version Date of calibration Configuration lt System gt Machine factor 1 0000E 07 1 0000 9 9999E 07 Minimum measuring time 2 5 10 20 50 100 200 500 ms 1 2 5s Minimum indicated measured value 1 0000E 12 1 9 9999E 12 Alarm definition ONLY system error System error OR Sensor monitoring Configuration lt Sensor gt Minimum sensor current 0 5 5 25 0 mA Maximum sensor current 0 5 25 0 mA Sensor type active passive Configuration lt Analog output gt Measuring range starting value 0 0000 Hz max 90 of measuring range end value Measuring range end value 1Hz 2000 0 Hz 34 999 kHz Output range 0 20mA 4 20MA resp 0 10V 2 10V resp Ti
21. sor cable OVS Sensor reference voltage V Sensor power supply Sign Sensor signal Pulse output Col Open collector of the pulse output Emit Signal reference for the open collector pulse output IQ reserved Relay Output NC Normally Closed contact NO Normally Open contact Com Common contact Current output l Analog output positive pole Analog output negative pole Main Power 24V Power line for T401 T402 OV Power reference for T401 T402 PE Earth status 2 3 2005 15 18 Operating instructions T401 T402 JAQUET LTD 10 Hardware configuration Su J1 Sensor type J2 Trigger level 2 wires active 20 mV to 5V sensor Factory setup 3 wires sensor or electromagnetic sensore Factory setup 500mV to 5V status 2 3 2005 16 18 Operating instructions T401 T402 JAQUET LTD 11 Maintenance Repair These instruments do not require any maintenance since they have very low drift rates and they contain neither batteries nor other components subject to wear When cleaning the instruments please note the limited protection against accidental electrical shock Whenever possible the power supply should be interrupted during cleaning For cleaning the surfaces use only spirit pure alcohol or soap suds Other solvents must not be used 12 Warranty The standard guarantee includes the replacement or repair of instruments showing a manufacturing
22. the Setpoints Limits Configuration Relay Control The relay output can be assigned to one of the two setpoints resp Limits 1 or 2 For test purposes the Limits can also be deactivated 6 3 12 Mode of Operation of the Setpoints Limits 1 and 2 Configuration Limits Each setpoint is defined by an upper and a lower threshold value With the mode of operation set to normal an input frequency rising above the upper threshold value activates the Limit and energizes the assigned relay With the input frequency falling below the lower threshold value the Limit is deactivated and the assigned relay is deenergized With the mode of operation set to inverse an input frequency rising above the upper threshold value deactivates the Limit and deenergizes the assigned relay With the input frequency falling below the lower threshold value the Limit is activated and the assigned relay is energized 6 3 13 Relay Control Configuration Relay Control The setpoints and the relay on the T 401 402 are normally controlled by parameter set A For testing control or to gain an additional setpoint a set B may be activated via the binary input Dependent on the status of the binary input either connected to OV low or left open high control set B or A is activated For reasons of safety switching over from parameter set B to set A can be delayed by a selectable 0 to 2000 seconds All the function
Download Pdf Manuals
Related Search