630.2111.047

Table of contents Magnetic switches – General features Electromechanical magnetic switches - Selection aid cylindrical and metric housing - Selection aid rectangular housing Page 195 Page 196 Page 198 Page 201 Electronical magnetic switches - Selection aid cylindrical and rectangular housings Page 204 Page 205 Page 199 Rectangular housings Page 202 Page 206 Rectangular housings Page 207 Overview Electromechanical magnetic switches Cylindrical and metric housings Overview Electronic magnetic switches Cylindrical and metric housings Magnets Page 210 Accessories - Overview magnets Page 210 - Mounting brackets Page 215 - Connecteurs Page 215 Output diagrams Page 203 Dimension diagrams/Magnetic switches Page 208 Model code Page 276 Wiring diagrams Page 278 194 Magnetic switches – General features Electromechanical and electronic models BERNSTEIN has extended its range of electromechanical magnetic switches with electronic versions which operate according to the Hall and magnetoresistive principle. Sensors Electromechanical and electronic magnetic switches have special properties which ensure optimal use in their respective environments. The electronic versions are characterised by their improved mechanical characteristics (high resistance to vibration, shock or impact) and are absolutely wear-free. The traditional electromechanical magnetic switches have a very high operational reliability thanks to the use of only one single "active" component (reed contact). The multi-voltage capability and low procurement costs allow these switches to be used in a wide range of applications. The matrix below highlights the main features for each principle of function and helps you to decide on which magnetic switch to use for your application. Technical features and fields of use More detailed information about the technical features and fields of use for the two principles of function is available in the following chapters. Downsizing; large sensing distances with compact design Encapsulated design, high protection classes High vibration resistance High switching frequency Improved pressure resistance 2-wire multi-voltage versions Multi-voltage capability (AC / DC) Alternative for inductive sensors (3-wire technology) Short-circuit proof and polarity reversal protection Low-cost versions Plastic, stainless steel and brass enclosures Electromechanical magnetic switches Electronic magnetic switches 195 Electromechanical magnetic switches Bernstein magnetic switches – the advantages ● reliability even under extreme ambient conditions. They are unaffected by dirt, humidity, gases, dust, etc. and operate completely free from wear and tear ● IP 67 protection ● repeatable switching point precision of approx. 0.1 mm ● may be operated from several directions ● can be mounted in any position ● electromechanical magnetic switches normally contain only a single component, thus ensuring high reliability ● easy to mount ● long electrical life (> 108 switching cycle lifetime if contacts are suitably protected) ● special types available for extreme temperature ranges (- 40° C to + 150° C) ● AC/DC switching Design, function and effect of an electromechanical magnetic switch The basic elements of this type of switch are the components which change their behaviour when approaching a magnet. The contact paddles invert their polarity (north and south pole) under the influence of a magnetic field. The approach can be made by either permanent magnets or electromagnets; the sensitivity of the switch and the field strength of the magnet determine the sensing distance. Correspondingly the approach or moving away of the magnet controls the opening and closing of the reed contacts. Normallyclosed, normally-open and changeover contacts are available in our range of products. The magnetic switches and their auxiliary components (resistors, diodes, triacs, output stages etc.) are cast in high-quality isolating material or casting compound to increase their resistance to vibration and to guarantee the protection class up to IP 67. For use under extreme ambient conditions such as wider temperature ranges, metal versions (non-corrosive steel, aluminium and brass) as well as standard plastic versions are available. Actuating direction Body (glass) N, H; or evaporated On On contact material FeNi paddle: Rhodium Actuating direction Detection area Construction of a reed contact Off Biasing On On On Bias magnets energise or hold the bistable or normally-closed contact closed, until a stronger magnet with opposite polarity neutralises the biasing. N.C. bistable “on-off” System: 1 System: 4 Actuating direction Detection area Off N.O. System: 2 bistable change-over On System: 5 change-over System: 3 Actuating direction Types of reed contacts bistable Actuation and switching behavior Switching behavior is principally determined by the movement and polarity of the magnet. The following drawings show typical characteristics. Body material and external dimensions are specified in the product overview. The magnetic switches with reed-contact output are identified by an „A“ in the second position of the type code (MA...). Switching frequency Up to 200 Hz, depending on the size of load to be switched (i. e. considerably faster than relays, contactors, etc.). 196 Detection area Off Switching distances Refer to tables of this catalogue to indentify which switching magnet may be used and therefore which minimum switching distance will be realised. Temperature ranges The standard version may be used in environments from – 5° C to + 70° C. Special types are also available offering an extended operating temperature range of – 40° C to + 150° C. In AC voltage applications, two solutions may be applied. 1) Voltage peaks induced by switching off inductive loads are suppressed by connecting a Voltage Dependent Resistor (VDR) in parallel to the reed contact. It should however be as large as possible to reduce the discharge current to a permissible value to ensure reliable contact protection. These considerations are also valid for charging capacitors. Electrical life Cable To maintain the long operational life of the electrical contacts, it is important to ensure the maximum supply voltage and maximum switching current are not exceeded. The following graphs show the load values for different contacts. Sensors Cable Relay Relay Guidelines for reed contact protection The values for current, performance and voltage specified in the catalogue are valid only for resisitive loads. Very often however, these loads will be used in conjunction with inductive or capacitive components when it is advisable to protect the reed contacts against voltage and current spikes. Whilst it is not possible to recommend a safe contact protection that applies to all load ranges (each individual case will require its own evaluation) we would like to present a general introduction to how reed contacts may be connected to different loads for improved operation. Suppression of reverse voltage peaks with a VDR 2) A Resistive/Capacitive (RC) element is connected in parallel to the contact, thus being in series with the load (vice versa is also possible). Relay 1. Inductive loads In DC voltage applications, contact protection is realised relatively easily with the help of a reverse polarity diode connected in parallel to the load. The diode polarity is selected so that it will block the normal operating voltage applied but will short-circuit any reverse voltage resulting from the switch being opened. (Note: these reverse voltage peaks can significantly exceed the normal operating voltage.) Relay Suppression of reverse voltage peaks with RC network Contact protection with resistors 2. Capacitive loads Using the selection matrix In contrast to inductive loads, increased making currents can occur in connection with capacitive loads and lamp loads. If charged capacitors are switched (including inherent cable capacities), a sudden discharge occurs that can damage and even weld contacts closed. The intensity of this discharge depends on the capacity and length of the cable leading to the switch but may be decreased by inserting a series resistor. The size of the resistor is determined by the characteristics of the corresponding switching circuit. To assist the user in selecting the right sensor for their application, Bernstein developed the following selection matrix. The individual fields match those in the product index to allow rapid selection of the most suitable sensor starting with the model description. By not using detailed technical descriptions the selection is considerably simplified. The corresponding output diagrams are shown on page 223. Suppression of reverse voltage peaks with a reverse polarity diode 197 Selection guide electromechanical magnetic switches in threaded and smooth barrels Switching capacity S/Imax. Model MA-30 ø 6 x 28 mm MA-46 ø 6.5 x 40 mm Switching voltage Umax. ø 12 x 86 mm MA-16 ø 12 x 86 mm MA-26 ø 12 x 92 mm MA-36 Output Housing material 10 VA/0.5 A 250 V 19 mm N.O. 5 VA/0.25 A 100 V 19 mm change over 20 VA/0.5 A 250 V 18 mm N.O. 20 VA/1 A 150 V on request change over 7 mm N.O. 250 V 10 mm change over 18 mm bistable 7 mm N.O. 12 mm change over 7 mm N.O. 12 mm change over 100 VA/3 A MA-06 Switching distance San 60 VA/1 A 250 VA/5 A 100 VA/3 A 250 V 60 VA/1 A 100 VA/3 A 250 V 60 VA/1 A Connection plastic PA 6.6 cable plastic PA 6 cable aluminium cable stainless steel cable plastic PA 6 cable 250 VA/5 A 250 V 13 mm bistable plastic PA 6.6 cable 80 VA/1 A 250 V 6 mm change over plastic PC plug 250 V 18 mm N.O. ø 13 x 108 mm MA-04 ø 15.5 x 145 mm MA-08 M 8 x 1 x 32 mm (Cable) M 8 x 1 x 40 mm (Plug) MA-18 M 12 x 1 x 60 mm MA-28 10 VA/3 A 100 V 20 VA/1 A stainless steel 13 mm change over plug 30 V 10 VA/0.5 A 18 mm N.O. 12 mm change over 250 V 60 VA/1 A cable brass, nickel-plated cable 60 VA/1 A 250 V 15 mm N.O. plastic PA cable 100 VA/3 A 250 V 6 mm N.O. brass, nickel-plated cable 7 mm N.O. 250 V 10 mm change over plastic PA 6 cable 22 mm bistable M 12 x 1 x 60 mm MA-23 M 12 x 1 x 80 mm 100 VA/3 A MA-33 M 12 x 1 x 80 mm MA-17 60 VA/1 A 250 VA/5 A 30 VA/0.5 A 250 V 12 mm change over plastic PA 6 cable 60 VA/1 A 250 V 17 mm change over brass, nickel-plated cable Pg 9 x 60 mm MA-43 Pg 9 x 80 mm 198 Smooth barrels MA-30, Ø 6 x 28 mm PA 6.6 MA-46, Ø 6.5 x 39 mm PA 6 MA-06, Ø 12 x 86 mm Al Switching distance (San) Referring magnet (page) Switching capacity (diagr.-no.) Max. switching voltage Switching function Special features 19 mm T-62N/S (212) 10 VA (4) 250 V N.O. Standard 18 mm T-62N/S (212) 20 VA (7) 250 V N.O. Standard 7 mm T-62N/S (212) 100 VA (11) 250 V N.O. Standard Designation MAK-3012-B-1 MAK-3013-X-1 MAK-4612-A-2 MAK-4613-3 MAA-0612-F-1 MAA-0613-L-1 MAA-0614-P-1 Part number 631.1230.571 631.0246.500 631.4206.246 Smooth barrels MA-06, Ø 12 x 86 mm Al MA-16, Ø 12 x 86 mm Stainless steel 1.4305 MA-16, Ø 12 x 86 mm Stainless steel 1.4305 Switching distance (San) Referring magnet (page) Switching capacity (diagr.-no.) Max. switching voltage Switching function Special features 16 mm T-62N/S (212) 60 VA (9) 250 V N.O. Temp. range 7 mm T-62N/S (212) 100 VA (11) 250 V N.O. Standard 7 mm T-62N/S (212) 100 VA (11) 250 V N.O. Temp. range 19 mm T-62N/S (212) 5 VA (2) 100 V change over Standard 631.0330.572 10 mm T-62N/S (212) 60 VA (9) 250 V change over Temp. range on request 20 VA (6) 150 V change over Standard 641.0346.336 12 mm T-62N/S (212) 60 VA (9) 250 V change over Standard -40 °C…+150 °C -40 °C…+150 °C 10 mm T-62N/S (212) 60 VA (9) 250 V change over Standard 631.6306.248 631.0406.554 -40 °C…+150 °C Designation MAA-0612-NT-4 MAA-0613-LT-1 MAN-1612-F-3 MAN-1613-L-1 MAN-1612-FT-8 Part number 641.0206.399 631.4216.476 631.4216.585 Smooth barrels MA-26, Ø 12 x 92 mm PA 6 MA-36, Ø 13 x 108 mm PA 6.6 MA-04, Ø 15.5 x 145 mm PC Switching distance (San) Referring magnet (page) Switching capacity (diagr.-no.) Max. switching voltage Switching function Special features 7 mm T-62N/S (212) 100 VA (11) 250 V N.O. Standard 12 mm T-62N/S (212) 60 VA (9) 250 V change over Standard 13 mm T-62N/S (212) 250 VA (12) 250 V bistable Standard 6 mm T-62N/S (212) 80 VA (10) 250 V change over plug Designation MAK-2612-F-1 MAK-2613-L-1 MAK-3614-P-2 MAK-0413-M-S Part number 631.4226.423 631.6326.426 631.0436.553 631.7304.313 631.6306.004 18 mm T-62N/S (212) 250 VA (12) 250 V bistable Standard 631.6316.259 Amphenol 199 Sensors Overview electromechanical magnetic switches in smooth barrels Overview electromechanical magnetic switches in threaded barrels Threaded barrels MA-08, M8 x 1 x 32 mm Stainless steel 1.4305 MA-08, M8 x 1 x 39 mm Stainless steel 1.4305 MA-18, M12 x 1 x 60 mm CuZn39Pb3 Switching distance (San) Referring magnet (page) Switching capacity (diagr.-no.) Max switching voltage Switching function Special features 18 mm T-62N/S (212) 10 VA (4) 250 V N.O. Standard 13 mm T-62N/S (212) 20 VA (5) 30 V change over plug Ø 6.5 18 mm T-62N/S (212) 10 VA (4) 250 V N.O. Standard Designation MAN-0812-B-1 MAN-0813-Y-1 MAN-0813-STK MAM-1812-B-1 MAM-1813-L-1 Part number 631.1208.596 631.0308.595 631.1218.294 Threaded barrels MA-28, M12 x 1 x 60 mm PA MA-23, M12 x 1 x 80 mm CuZn39Pb3 MA-33, M12 x 1 x 80 mm PA 6 Switching distance (San) Referring magnet (page) Switching capacity (diagr.-no.) Max switching voltage Switching function Special features 15 mm T-62N/S (212) 60 VA (9) 250 V N.O. Standard 7 mm T-62N/S (212) 100 VA (11) 250 V N.O. Standard 7 mm T-62N/S (212) 100 VA (11) 250 V N.O. Standard 10 mm T-62N/S (212) 60 VA (9) 250 V change over Standard Designation MAK-2812-L-3 MAM-2312-F-1 MAK-3312-F-2 MAK-3313-L-1 MAK-3314-P-2 Part number 641.6228.260 631.4223.268 631.4233.002 631.6333.005 641.0433.350 Threaded barrels MA-17, Pg 9 x 60 mm PA 6 MA-43, Pg 9 x 80 mm CuZn39Pb3 Switching distance (San) Referring magnet (page) Switching capacity (diagr.-no.) Max switching voltage Switching function Special features 12 mm T-62N/S (212) 30 VA (8) 250 V N.O. Standard 17 mm T-62N/S (212) 60 VA (9) 250 V change over Standard Designation MAK-1713-K-1 MAM-4313-L-2 Part number 631.5317.001 631.6343.544 200 13 mm T-62N/S (212) 10 VA (3) 100 V change over Standard 631.0308.597 12 mm T-62N/S (212) 60 VA (9) 250 V change over Standard 631.6318.002 22 mm T-62N/S (212) 250 VA (12) 250 V bistable Standard Selection guide electromechanical magnetic switches in rectangular housings Model Switching capacity S/Imax. MA-11 28.6 x 6.4 x 18 mm MA-01 Switching voltage Umax. Switching distance San Output Housing material 10 VA/0.5 A 250 V 10 mm N.O. 3 VA/0.25 A 130 V 8 mm change over 10 VA/0.5 A 250 V 25 mm bistable 10 VA/0.5 A 250 V 10 mm N.O. 10 mm N.O. 5 mm change over 18 mm N.O. 12 mm change over Connection plastic PA 6.6 cable plastic PA 6.6 cable plastic PA 6.6 cable plastic PC cable plastic PA 6 cable plastic PA 6.6 cable plastic PA 6.6 plug MA-45 45 x 9 x 25.5 mm MA-13 68 x 30 x 15 mm 10 VA/0.5 A 250 V 60 VA/1 A 10 VA/0.5 A 250 V 60 VA/1 A 100 VA/3 A MA-02 80 x 15 x 20 mm 30 VA/0.5 A 250 V 250 VA/5 A 100 VA/3 A MA-12 80 x 15 x 20 mm 250 V 60 VA/1 A 100 VA/3 A MA-44 80 x 15 x 30 mm MA-32 80 VA/1 A 250 V 250 VA/5 A 21 mm N.O. 18 mm change over 20 mm bistable 21 mm N.O. 24 mm change over 25 mm bistable 19 mm N.O. 22 mm change over 20 mm bistable 16 mm bistable cable 250 VA/5 A 250 V plastic PBT plug 85 x 24 x 26 mm 100 VA/3 A MA-42 88 x 13 x 25 mm 80 VA/1 A 250 V 250 VA/5 A 100 VA/3 A MA-03 105 x 25.5 x 58 mm Sensors 45 x 9 x 13 mm 80 VA/1 A 250 VA/5 A 250 V 25 mm N.O. 28 mm change over 20 mm bistable 10 mm N.O. 10 mm change over 15 mm bistable plastic PA 6.6 cable aluminium die casting screw termination 201 Overview electromechanical magnetic switches in rectangular housings Rectangular housings MA-11, 28.6 x 6.4 x 18 mm PA 6.6 MA-01, 45 x 9 x 13 mm PA 6.6 MA-45, 45 x 9 x 25.5 mm PA 6.6 Switching distance (San) Referring magnet (page) Switching capacity (diagr.-no.) Max. switching voltage Switching function Special features 10 mm TK-11-11 (229) 10 VA (4) 250 V N.O. Standard 10 mm TK-11-01 (229) 10 VA (4) 250 V N.O. Standard 10 mm TK-45 (229) 10 VA (4) 250 V N.O. Standard Designation MAK-1112-B-1 MAK-1113-1.5 MAK-1114-B-5 MAK-0112-B-1 MAK-4512-B-1 MAK-4513-L-1 Part number 631.1211.541 631.1201.288 631.1245.539 Rectangular housings MA-13, 68 x 30 x 15 mm PC MA-02, 80 x 15 x 20 mm PA 6.6 MA-02, 80 x 15 x 20 mm GDAlSi 12 Switching distance (San) Referring magnet (page) Switching capacity (diagr.-no.) Max. switching voltage Switching function Special features 8 mm T-62N/S (212) 60 VA (9) 250 V N.O. Standard 21 mm TK-21-02 (229) 100 VA (11) 250 V N.O. Standard 18 mm TK-21-02 (229) 30 VA (8) 250 V change over Standard Designation MAK-1313-L-1 MAK-0212-F-1 MAK-0213-K-1 MAK-0214-P-3 MAA-0212-FT-5 MAA-0213-LT-1 Part number 631.6313.004 631.4202.204 631.5302.309 Rectangular housings MA-12, 80 x 15 x 20 mm PA 6.6 MA-44, 80 x 15 x 30 mm PA 6.6 Switching distance (San) Referring magnet (page) Switching capacity (diagr.-no.) Max. switching voltage Switching function Special features 21 mm TK-21-12 (229) 100 VA (11) 250 V N.O. Standard 24 mm 25 mm TK-21-12 (229) T-62N/S (212) 60 VA (9) 60 VA (9) 250 V 250 V change over bistable Standard Standard 19 mm TK-44 (229) 100 VA (11) 250 V N.O. Standard 22 mm TK-44 (229) 80 VA (10) 250 V change over Standard Designation MAK-1212-F-1 MAK-1213-L-1 MAK-1214-L-2 MAK-4412-F-1 Part number 631.4212.217 631.6312.220 641.0412.143 631.4244.536 8 mm 25 mm TK-11-11 (229)T-67N/S 3 VA (1) 10 VA (4) 130 V 250 V change over bistable Standard Standard 641.0311.368 631.1411.603 20 mm T-62N/S 250 VA (12) 250 V bistable Standard 10 mm T-62N/S (212) 100 VA (11) 250 V N.O. Temp. range 5 mm TK-45 (229) 60 VA (9) 250 V change over Standard 631.6345.540 30 mm T-62N/S (212) 60 VA (9) 250 V change over Temp. range -40 °C…+150 °C -40 °C…+150 °C 202 641.9402.397 631.4202.522 631.6302.389 MA-32, 85 x 24 x 26 mm PBT 20 mm T-62N/S (212) 250 VA (12) 250 V bistable Standard 15 mm T-67N/S 100 VA (11) 250 V bistable Standard 16 mm T-62N/S (212) 250 VA (12) 250 V bistable Standard MAK-4413-M-1 MAK-4414-P-2 MAK-3214-F-3 MAK-3214-P-1 631.7344.538 631.0444.562 631.4432.609 631.0432.598 Overview electromechanical magnetic switches in rectangular housings MA-32, 85 x 24 x 26 mm PBT MA-42, 88 x 13 x 25 mm PA 6.6 MA-03, 100 x 29.5 x 58 mm GK-AlSi 12 Switching distance (San) Referring magnet (page) Switching capacity (diagr.-no.) Max. switching voltage Switching function Special features 15 mm T-62N/S 100 VA (11) 250 V bistable plug flat plug 6.3 16 mm T-62N/S (212) 250 VA (12) 250 V bistable plug flat plug 4.8 25 mm TK-42 (213) 100 VA (11) 250 V N.O. Standard 22 mm TK-42 (213) 80 VA (10) 250 V change over Standard 20 mm T-62N/S (212) 250 VA (12) 250 V bistable Standard 10 mm TA-31 (214) 100 VA (11) 250 V N.O. Standard 10 mm TA-31 (214) 80 VA (10) 250 V change over Standard Designation MAK-3214-F-STK 6.3 MAK-3214-P-STK 4.8 MAK-4212-F-1 MAK-4213-M-1 MAK-4214-P-1 MAA-0312-F MAA-0313-M MAA-0314-P Part number 631.4432.612 631.0432.590 631.4242.533 631.7342.535 631.0442.534 631.4203.232 631.7303.312 631.9403.532 15 mm T-62N/S (212) 250 VA (12) 250 V bistable Standard Technical data standard versions electromechanical magnetic switches Switching current Temperature range Protection class (IEC 529, EN 60 529) Repeatable accuracy Mech. operational life see output diagram -5 °C…+70 °C IP 67 ≈ ± 0.1 mm > 3 x 108 switching cycles Output diagrams electromechanical magnetic switches U[V] 3 VA 130 U [V] I [A] 24 48 120 230 0,125 0,063 0,025 - U[V] 5 VA 100 U [V] I [A] 24 48 120 230 0,125 0,104 - 20 U[V] 10 VA 100 U [V] I [A] 24 48 120 230 0,417 0,208 - I [A] 24 48 120 230 0,417 0,208 0,083 0,043 20 0,500 I[A] 0 0 0,250 I[A] 0,050 (2) 20 VA 250 U [V] I [A] 24 48 120 230 0,833 0,417 0,167 0,087 U[V] 0 0,500 I[A] 0,100 (3) 30 VA 250 U [V] I [A] 24 48 120 230 0,500 0,500 0,250 0,130 60 U[V] 0 (7) 12 24 48 I [A] 1,000 0,833 - (4) 60 VA 250 U [V] I [A] 24 48 120 230 1,000 1,000 0,500 0,261 U[V] 0,667 1,000 I[A] (5) 0,080 0 (8) 0,120 0 (9) U [V] I [A] 24 48 120 230 0,833 0,417 0,167 - 80 VA 250 U [V] I [A] 24 48 120 230 1,000 1,000 0,667 0,348 0 1,000 I[A] 0,133 100 VA U[V] 250 U [V] I [A] 24 48 120 230 3,000 2,083 0,833 0,435 U[V] 250 VA 250 U [V] I [A] 24 48 120 230 5,000 5,000 2,083 1,087 80 60 0,500 I[A] 20 VA (6) 50 33,333 1,000 I[A] U[V] 150 20 0,040 20 0 U [V] 30 20 0,250 I[A] 0,023 (1) U[V] 20 VA U[V] U [V] 20 12 0 10 VA U[V] 250 0,240 1,000 I[A] 0 (10) 0,320 1,000 I[A] 0 0,400 (11) 3,000 I[A] 0 1,000 5,000 I[A] (12) 203 Sensors Rectangular housings Dimension diagrams magnetic switches MA-01 Page 202 MA-02 Page 202 MA-03 Page 203 MA-04 Page 199 cable version plug version MA-06 Page 199 MA-08 Page 200 MA-11 Page 202 MA-12 Page 202 MA-13 Page 202 MA-16 Page 199 MA-17 Page 200 MA-18 Page 200 MA-23 Page 200 MA-26 Page 199 MA-28 Page 200 MA-30 Page 199 208 MA-32 (cable) Page 202 MA-32 (plug) Page 203 MA-33 Page 200 MA-36 Page 199 MA-42 Page 203 MA-43 Page 200 MA-44 Page 202 MA-45 Page 202 Page 207 MA-61 Page 206 active surface active surface MA-46 Page 199 MA-52 Page 207 MA-55 active surface MA-62 Page 206 MA-63 Page 206 MA-70 Page 206 MA-80 Page 207 209 Sensors flat plug Magnets 1. Hard Ferrite Magnets Barium and strontium hard ferrites are economical, reliable components that are also used in automation, control and measurement applications. If operated in higher temperature ranges, the specified switching distance will decrease by a factor of 0.2% per 1°C. Chemical characteristics: Ferrite magnets are oxide ceramics. They are made from approx. 80% iron oxide and 20% barium- or strontium oxide. The magnets are resistant to a large number of chemicals including solvents, dyes and weak acids. If strong organic and inorganic acids (e.g. hydrochloric, sulphuric and hydrofluoric acid) are used, their resistance is basically determined by the temperature, concentration and reaction time of the medium. In general, the resistance should first be determined using longterm tests. Mechanical characteristics: Due to their ceramic character, ferrites are brittle and are sensitive to shock and bending loads. 2. Rare-earth magnets Permanent magnets that are made from samarium cobalt and neodymium iron boron are high-performance and highquality components that are especially used in drive and control engineering. If used in higher temperature ranges, the specified switching distance has to be decreased by a factor of 0.02% per 1°C. Chemical characteristics: All rare-earth magnets are metallic materials and show the corresponding characteristics associated with these materials (e.g. the polished shine immediately after being processed). The magnets will oxidise in moist surroundings and acidic environments may decompose them. Conversely, the magnets are extremely resistant to alkaline environments. In water with a pH-value of 7, rare-earth magnets will show only slight surface oxidation but otherwise are resistant. 210 Mechanical characteristics: Minor chips may occur if rare-earth magnets are submitted to impact stress. They respond very sensitively to vibrations and may become demagnetised. Mechanical characteristics: Plastic magnets can be submitted at any time to bending and vibrations without breaking or chipping. Application in explosion-hazardous surroundings 3. Plastic magnets Plastic-bound permanent magnets have an interesting cost-performance ratio and can be produced in a large variety of shapes. Sprayed magnets are typical composite materials. The magnetic powder is embedded in thermoplastics (polyamides), allowing the most diverse shapes to be created. Magnets must not be handled in explosion-hazardous surroundings since they can cause sparks. Grit and chips from rare earth magnets are self-igniting and burn off with very high temperatures. They should therefore only be machined using a lot of water and never in dry conditions since even dried grinding dust can ignite. Strong magnetic fields Chemical characteristics: Surface corrosion can rarely be found on plastic-bound magnets. For this reason, they can be used in most application fields without additional coating. Strong magnetic fields can interfere or even damage electronic or mechanical equipment. This includes cardiac pacemakers. Appropriate safety clearances are specified in the corresponding manuals or may be requested from the manufacturers. Applications Permanent magnets must not be submitted to long term radioactive radiation or they may lose their magnetisation. ● counting ● position indication in lifts ● end-stop switches in pneumatic and hydraulic installations ● indication on claps, sliders and valves ● conveyors in high-bay shelving ● position detection in textile, packaging and meat-cutting machines ● run-time and down-time monitoring of machines ● control of machine tools ● level control of liquids (see page 240 ff. for more details) General stability Rare earth magnets must be stored in dry conditions in order to avoid oxidisation. They are not suitable for all environments since they are also partially soluble. Effects on persons There are no known side-effects caused by touching magnet materials. Magnet shapes Rectangular, circular and cylindrical magnets are the most common shapes of permanent magnets. In addition to these standard shapes, permanent magnets may be manufactured in many other shapes. The shape is in most cases designated during the pressing of the magnet, since any later shaping can only be performed using complex diamond tools. Holes and openings can only be inserted in line with the pressing direction. Magnetisation direction Magnetisation in alignment with the formed magnetic crystals is preferred since this allows the highest magnetic values to be achieved. The preferred direction is achieved by submitting the magnetic powder to a strong external magnetic field (coil) during the pressing process. As magnets have no preferred direction the magnetisation direction and type can be selected freely. Instructions for mounting a magnetic switch-system on ferromagnetic materials If magnetic limit switches and their corresponding magnets are mounted on magnetisable material (Fe, etc.), the nominal distance may be reduced. To ensure error-free operation, a minimum gap of 15 mm between the magnetic switch and any material which can be magnetised should be maintained as a guide value. The same applies to magnets. 211 Sensors Radioactive radiation Accessories Magnets without encapsulation Magnets without encapsulation T-75 T-06N/S T-61N/S T-67N/S Magnet material Temperature range (in relation to magnetic switch application) Temperature coefficient Housing material Part number Rare-earth -40 °C…+150 °C -40 °F…+302 °F 0.2 %/K - Neodym-Eisen-Bor (NdFeB) -40 °C…+150 °C -40 °F…+302 °F 0.2 %/K - Bariumferrite -40 °C…+150 °C -40 °F…+302 °F 0.2 %/K - Bariumferrite -40 °C…+150 °C -40 °F…+302 °F 0.2 %/K - 630.1175.057 630.1106.065 630.1261.035 630.1167.054 All dimensions in mm (inch) Marking: slit on north pole side Magnets without encapsulation T-62N/S T-69N/S T-68N T-68S Magnet material Temperature range (in relation to magnetic switch application) Temperature coefficient Housing material Part number Bariumferrite -40 °C…+150 °C -40 °F…+302 °F 0.2 %/K - Bariumferrite -40 °C…+150 °C -40 °F…+302 °F 0.2 %/K - Bariumferrite -40 °C…+150 °C -40 °F…+302 °F 0.2 %/K - Bariumferrite -40 °C…+150 °C -40 °F…+302 °F 0.2 %/K - 630.1262.039 630.1269.031 630.1268.028 630.1368.033 90° chamfering 90° chamfering on north pole side on south pole side All dimensions in mm (inch) 212 Magnets in plastic housings TK-11-11 TK-11-01 TK-21-02 TK-21-12 Magnet material Temperature range (in relation to magnetic switch application) Temperature coefficient Housing material Part number AlNiCo-500 -20 °C…+80 °C -4 °F…+176 °F 0.2 %/K PA 6.6 AlNiCo-500 -20 °C…+80 °C -4 °F…+176 °F 0.2 %/K PA 6.6 AlNiCo-500 -20 °C…+80 °C -4 °F…+176 °F 0.2 %/K PA 6.6 AlNiCo-500 -20 °C…+80 °C -4 °F…+176 °F 0.2 %/K PA 6.6 630.2111.047 630.3111.001 630.3121.002 630.2121.030 Magnets in plastic housings TK-45 TK-42 TK-44 Magnet material Temperature range (in relation to magnetic switch application) Temperature coefficient Housing material Part number AlNiCo-500 -20 °C…+80 °C -4 °F…+176 °F 0.2 %/K PA 6.6 AlNiCo-500 -20 °C…+80 °C -4 °F…+176 °F 0.2 %/K PA 6.6 AlNiCo-500 -20 °C…+80 °C -4 °F…+176 °F 0.,2 %/K PA 6.6 630.2145.048 630.2142.049 630.2144.050 Sensors Accessories Magnets in plastic housings All dimensions in mm (inch) All dimensions in mm (inch) 213 Accessories Magnets in metal housings Mounting brackets Magnets in metal housings TK-50 TK-57N TK-57S Magnet material Temperature range (in relation to magnetic switch application) Temperature coefficient Housing material Part number Bariumferrit -20 °C…+80 °C -4 °F…+176 °F 0.2 %/K PA 6.6 Bariumferrit -20 °C…+80 °C -4 °F…+176 °F 0.2 %/K PBT Bariumferrit -20 °C…+80 °C -4 °F…+176 °F 0.2 %/K PBT 630.2100.053 630.2257.060 630.2357.061 24 4 4 24 All dimensions in mm (inch) 34 10 10 S 16 30 48 16 30 48 Magnets in metal housing TA-21-02 TA-31 TA-33 Magnet material Temperature range (in relation to magnetic switch application) Temperature coefficient Housing material Part number AlNiCo-500 -40 °C…+150 °C -40 °F…+302 °F 0.2 %/K Al AlNiCo-500 -20 °C…+80 °C -4 °F…+176 °F 0.2 %/K Al Bariumferrit -20 °C…+80 °C -4 °F…+176 °F 0.2 %/K Al 630.5121.064 630.3131.005 630.3133.034 All dimensions in mm (inch) 214 active surface (red) 5.2 4.5 S 34 5.2 4.5 active surface (green) Accessories Miniature snap-in connectors Miniature snap-in connectors GDK-R06US/S00-2.5PU GDK-R06US/S00-5PU WDK-R06US/S00-2.5PU WDK-R06US/S00-5PU PUR PA 12 POM 60 VAC/75 VDC 3A -25 °C…+90 °C -13 °F…+194 °F 2.5 m 3 x 0.25 mm2 IP67/NEMA 4 PUR PA 12 POM 60 VAC/75 VDC 3A -25 °C…+90 °C -13 °F…+194 °F 5m 3 x 0.25 mm2 IP67/NEMA 4 PUR PA 12 POM 60 VAC/75 VDC 3A -25 °C…+90 °C -13 °F…+194 °F 2.5 m 3 x 0.25 mm2 IP67/NEMA 4 PUR PA 12 POM 60 VAC/75 VDC 3A -25 °C…+90 °C -13 °F…+194 °F 5m 3 x 0.25 mm2 IP67/NEMA 4 413.9100.219 413.9100.220 413.9100.221 413.9100.222 Mounting brackets BWN-M06NI/40 x 47 BWN-M06NI/27 x 38 BWN-M36NI Material for models Part number Dimension diagrams Niro 1.4301 Niro 1.4301 Niro 1.4301 MA-06, MA-16, MA-26, MA-15 MA-06, MA-16, MA-26, MA-15 MA-06, MA-16, MA-26, MA-15 Terminal code 1 = brown 2 = black 3 = blue 1 2 Material of cable sleeve Material of coupling Material of body Operating voltage Current-carrying capacity Temperature range Cable length Cable structure Protection class after installation Part number Dimension diagrams 410.2802.001 410.2802.002 Sensors 3 490.4700.035 215