Electronic magnetic switches Electronic magnetic switches The electronic magnetic switches from Bernstein are based on two different physical operating principles: the Hall effect and magneto-resitive (MR) effect. The sensors are characterised by their high sensing range and the absolute non-sensitivity to mechanical influences. MR sensor technology The prime elements of MR sensors are magnetic field dependent, ferromagnetic thin-film resistors. The base material of such a unit is made from silicon to which the ferromagnetic film is applied using electron gun vaporisation. Fields of use for MR sensors The main application areas for MR sensors are in the detection of current, angles, speed of rotation, position and magnetic fields. Detecting very low magnetic fields is possible with such sensors. An output voltage proportional to the magnetic field can be electrically conditioned. The ability to set the sensitivity or hysteresis allows these sensors to be used in a wide range of applications. Hall element technology Fields of use for Hall sensors The Hall effect is defined as the generation of a voltage difference on the opposing sides of a thin gold wafer through which a current is flowing. This effect also occurs in some semiconductors when certain geometrical conditions are fulfilled. The thickness of the wafer must be very small in relation to the length and width. Since, when the sensor is suitably installed, only the polarity of the Hall voltage or the zero crossing is evaluated, InSb is used as the sensitive material for these Hall elements as its high sensitivity to temperature is not a problem for this application. Having designed the Hall elements for various application areas, they can be used for: ● measuring induction ● measuring tangential and axial components of magnetic induction ● measurements at low temperatures ● contact-free signal generation ● replacing inductive sensors (large sensing distance) Signal Hall elements are used in all types of controllers as contact-free signal sensors. Since the signal voltage is independent of the speed of motion, and in contrast to inductive systems, targets with a very low speed, almost stopped, can be detected. Schematic description of the Hall effect 204 Selection guide electronic magnetic switches in smooth and threaded barrels and rectangular housings Designation MA-70 Switching current Imax. Operating voltage Ub Switching distance Sn* 200 mA 10…30 V 45 mm 200 mA 10…30 V 17 mm Activity: N = North Pole S = South Pole O = Omnipolar Output- and switching function: N.O. N.C. bi = bistable O PNP N.O. N PNP N.O. N PNP N.C. N PNP N.O. N PNP N.C. Housing material Connection stainless steel 1.4401 cable plastic PPE, red brass, nickel-plated cable plastic PA 6, red brass, nickel-plated cable** plastic PA 6, red brass, nickel-plated cable** brass, nickel-plated cable brass, nickel-plated cable** plastic PA 12, black cable** MA-61 M 10 x 1 x 40 mm MA-62 400 mA 10…30 V M 12 x 1 x 46 mm MA-63 35 mm 400 mA 10…30 V M 18 x 1 x 35 mm MA-80 17 mm 200 mA 10…30 V 400 mA 10…30 V N/S*** PNP bi N PNP N.O., NPN N.O. N PNP N.C., NPN N.C. 35 mm N/S*** PNP bi 45 mm O PNP N.O. N PNP N.O. N PNP N.C. N/S*** PNP bi O PNP N.O. PNP N.O. O PNP N.C. PNP N.C. 17 mm Sensors ø 6.5 x 25 mm 8 x 8 x 40 mm MA-55 12 x 12 x 55 mm MA-52 17 mm 35 mm 200 mA 10…30 V 26 x 13 x 43 mm 60 mm * Switching distance referring to magnet T-62N/S for magnet T-67N/S approx. 10 % lower switching distance for magnet T-69N/S approx. 30 % higher switching distance ** Plug on request *** Activity: south-pole – switches on north-pole – switches off 205 Overview electronic magnetic switches in smooth and threaded barrels Smooth and threaded barrels MA-70, Ø 6.5 x 25 mm Stainless steel 1.4401 Switching distance (San) Mag. sensivity Referring magnet (page) Switching function PNP Designation Part number MA-61, M 10 x 1 x 40 mm PPE, red MA-61, M 10 x 1 x 40 mm CuZn39Pb3, nickel-plated 45 mm 0.5 mT T-62N/S (212) N.O. 17 mm 10 mT T-62N/S (212) N.C. 17 mm 10 mT T-62N/S (212) N.O. 17 mm 10 mT T-62N/S (212) N.C. 17 mm 10 mT T-62N/S (212) N.O. MEN-70OP2-01.2-2/K MEK-61NP1-10.2-2/KL MEK-61NP2-10.2-2/KL MEM-61NP1-10.2-2/KL MEM-61NP2-10.2-2/KL 637.3270.067 637.1161.040 637.1261.041 637.1161.043 637.1261.042 Smooth and threaded barrels MA-62, M 12 x 1 x 46 mm PA 6, red Switching distance (San) Mag. sensivity Referring magnet (page) Switching function PNP Designation 17 mm 10 mT T-62N/S (212) N.C. 17 mm 10 mT T-62N/S (212) N.O. 35 mm 2.5 mT T-62N/S (212) bistable 17 mm 10 mT T-62N/S (212) N.C. 17 mm 10 mT T-62N/S (212) N.O. 35 mm 2.5 mT T-62N/S (212) bistable MEK-62NP1-10.4-2/KL MEK-62NP2-10.4-2/KL MEK-62SP4-03.4-2/KL MEM-62NP1-10.4-2/KL MEM-62NP2-10.4-2/KL MEM-62SP4-03.4-2/KL 637.1262.048 637.3462.049 637.1162.044 637.1262.045 637.3462.046 Part number 637.1162.047 MA-62, M 12 x 1 x 46 mm CuZn39Pb3, nickel-plated Smooth and threaded barrels MA-63, M 18 x 1 x 35 mm PA 6, red Switching distance (San) Mag. sensivity Referring magnet (page) Switching function PNP Designation Part number NPN Designation Part number 17 mm 10 mT T-62N/S (212) N.C. 17 mm 10 mT T-62N/S (212) N.O. 35 mm 2.5 mT T-62N/S (212) bistable 17 mm 10 mT T-62N/S (212) N.C. 17 mm 10 mT T-62N/S (212) N.O. 35 mm 2.5 mT T-62N/S (212) bistable MEK-63NP1-10.4-2/KL MEK-63NP2-10.4-2/KL MEK-63SP4-03.4-2/KL MEM-63NP1-10.4-2/KL MEM-63NP2-10.4-2/KL MEM-63SP4-10.4-2/KL 637.1163.053 637.1263.054 637.3463.055 637.1163.050 637.1263.051 637.3463.052 MEK-63NN1-10.4-2/KL MEK-63NN2-10.4-2/KL MEM-63NN1-10.4-2/KL MEM-63NN2-10.4-2/KL 637.1563.069 637.1663.070 637.1563.071 637.1663.072 206 MA-63, M 18 x 1 x 35 mm CuZn39Pb3, nickel-platet Overview electronic magnetic switches in rectangular housings MA-80, 8 x 8 x 40 mm CuZn39Pb3, nickel-plated MA-55, 12 x 12 x 55 mm CuZn39Pb3, nickelé Switching distance (San) Mag. sensivity Referring magnet (page) Switching function PNP Designation 45 mm 0.5 mT T-62N/S (212) N.O. 17 mm 10 mT T-62N/S (212) N.C. 17 mm 10 mT T-62N/S (212) N.O. 35 mm 2.5 mT T-62N/S (212) bistable MEM-80OP2-01.2-2/K MEM-55NP1-10.4-2/KL MEM-55NP2-10.4-2/KL MEM-55SP4-03.4-2/KL Part number 637.3280.057 637.1155.058 637.1255.059 637.3455.060 Rectangular housings MA-52, 43 x 26 x 13 mm PA 12, noir Switching distance (San) Mag. sensivity Referring magnet (page) Switching function PNP Designation Part number NPN Designation Part number 60 mm 0.1 mT T-62N/S (212) N.C. 60 mm 0.1 mT T-62N/S (212) N.O. MEK-52OP1-00.4-2/KL MEK-52OP2-00.4-2/KL 637.3152.075 637.3252.068 MEK-52ON1-00.4-2/KL MEK-52ON2-00.4-2/KL 637.3552.073 637.3652.074 Technical data standard versions electronic magnetic switches Operating voltage Rated operating current Switching frequency Output Reverse polarity protection LED for output function Temperature range Protection class Cable (2 m) Plug on request UB IB MA-70 10 V…30 V ≤ 200mA l MA-61 10 V…30 V ≤ 200mA MA-62 10 V…30 V ≤ 400mA MA-63 MA-80 10 V…30 V 10 V…30 V ≤ 400mA ≤ 200mA ≥ 5000 Hz short-circuit and overload protection yes l –20 °C/+70 °C IP 65/IP 67 l l l l MA-55 10 V…30 V ≤ 200mA MA-52 10 V…30 V ≤ 200mA l l l l l l l l l l l 207 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