Railway Speed Sensors MTR series: Speed sensors for railway applications English Product Features Innovative screening concept (patent pending) High insulation resistance New sealing concept for long lifetime IP69K tightness on sensor side High pull out force of cable User benefits Superior electromagnetic immunity allows flexible installation (e.g. closer to a traction motor than standard sensors) Less risk of sensor damages due to differences in electric potential Longer lifetime Sensor withstands high pressure wash Less risk of damage during installation Target applications for railways On railways the speed signal is used for: Traction motor feedback Wheel slide protection (prevent wheels from not rotating) Wheel slip protection (prevent wheels from spinning) Speed indication Unstable running (roll monitoring) Generation of service signals such as for door opening Signaling Typical locations of speed measurement: Traction motor Gear box Wheel axis General Information The Baumer MTR series is designated for speed measurement in harsh environment, in particular for railway applications. It offers compliance with all relevant standards such as the EN 50155, EN 61373, EN 45455 and exceeds these requirements in many aspects to meet the expectations in real life. The measurement principle is based on measuring the changes in the magnetic field when a gear wheel rotates in front of the sensor. The sensors are available in many variants: Electronics: sensors with different number of signals, insulated systems and outputs are available Housing: railway typical housing with 42mm flange in straight and L-shaped (angled) versions Connection: customer specific connections at the cable end Screening: there are variants where the cable screen is either connect to the sensor housing or not Gear wheel: the sensors can be adjusted to operate with different wheels, in particular with different modules EN/2015.11.30 On the following pages it is described how the different variants can be generated: First the sensor electronics needs to be chosen, followed by the sensor housing, the connection, the target gear wheel, cable termination and cable length. Design and specifications subject to change without notice The robust stainless steel housing together with a rugged 13mm thick silicone cable provides a high mechanical stability for demanding applications. In particular, its high pull out force reduces the risk of damage during installation. The innovative screening concept (patent pending) transfers the cable screen to the inside of the sensor and guarantees that the sensor electronics is always protect from electromagnetic disturbances which are present for example in the vicinity of traction motors. In addition, the internal screen provides a high insulation resistance between electronics and sensor housing. This reduces the risk of sensor damage, if there high differences in electric potential between sensor housing and electronics. The sensors were qualified in very demanding environmental and EMC tests. The associated test reports are available upon request. Speed generation down to 0 Hz allows for accurate measurements of slow speed. www.baumer.com Product Data Sheet, MTR_01 1 / 10 Compression ring kit Railway ZPX1-006 Speed Sensors MTR For LBFS series: sliding Speed connection sensors for railway applications Technical data (general) Environmental specification Electrical interface (general) Vibration resistance (functional) Switching frequency range 0 ... 20 kHz Voltage supply +Vs (permanent) 9 ... 30 VDC extended versions available upon request Vibration resistance (long time) Nominal voltage Un (according EN 50155) 15 ... 21.4 VDC Shock resistance Current consumption max. (no load) EN 60068-2-64 Fh 10 minutes, 38m/s2, 5-250 Hz EN 61373: category 3 EN 60068-2-64 Fh 5h per axis, 144m/s2, 5-250 Hz EN 61373: category 3 EN 60068-2-27 Ea EN 61373: category 3 6 bumps per axis, 1000m/s2, 6 ms 30 mA Constant temperature (operational cold) IEC 60068-2-1 Ad Voltage outputs push-pull (for each output) Constant temperature (operational dry heat) IEC 60068-2-2 Bd Maximal output current < 20 mA (for each output) exceeds EN 50155 (12.2.4) Short circuit protection (output to GND) yes Constant temperature (damp heat) IEC 60068-2-78 Reverse polarity protection (+Vs to GND) yes Constant temperature (storage cold) IEC 60068-2-1 Ab Insulation strength (electronics to housing) 2.5 kVrms Duty cycle Constant temperature (storage dry heat) 90° +/- 45° (minimal phase shift φ>45°) more accurate versions available upon request 50% +/- 10% more accurate versions available upon request 72h, -40°C IEC 60068-2-1 Bb 1000h, 125°C Temperature variation (constant humidity) IEC 60068-2-14 Nb Temperature variation (varying humidity) IEC 60068-2-30 Db 20 cycles (exposure 3h), -40°C … 120°C, 1°C/min exceeds EN 50155 (12.2.5) 6 cycles (exposure 24h), 25°C … 60°C, 1°C/min, 90-100% humidity Constant humidity 30 days, 85°C, 95% humidity Fast temperature changes IEC 60068-2-14 Na 35 cycles, -20°C … 100°C, changing time <5 min As a standard the cable shield is not connected to the sensor housing. Other variants available upon request. Mechanical data Housing material stainless steel 1.4404 Cable (standard) silicone cable Ø13mm (black) AWG 20 fire protection: HL2 (EN 45545-2) O-ring HNBR 70 Shore A Ø22 x 2,5 Gear wheel requirements Tooth size 21 days, 40°C, 93% humidity exceeds EN 50155 (12.2.13) Shielding Connection of cable shield 6h, 125°C exceeds EN 50155 (12.2.3 and 14) Signal quality Phase shift (only applicable to sensors with quadrature output) -2h, 40°C modules 1 to 3 (others on request) Fast temperature changes followed by immersion IEC 60068-2-14 Na Salt resistance 96h in salty atmosphere, 35°C 10 cycles, 5°C … 85°C, changing time <10 s at the end: immersion in water 24h, 1.5m EN 50155 (12.2.10) Electromagnetic compatiblity Electrostatic discharge EN 61000-4-2 EN 50121-3-2 (9.3): criterion B ±6 kV (contact discharge) ±8 kV (air discharge) Radio frequency immunity (radiated) EN 61000-4-3 EN 50121-3-2 (9.2): criterion A 80 Hz … 1000 MHz: 20 V/m, 80% AM, 1kHz 1400 MHz … 2100 MHz: 10 V/m, 80% AM, 1kHz 2100 MHz … 2500 MHz: 5 V/m, 80% AM, 1kHz Electrical fast transient/burst EN 61000-4-4 EN 50121-3-2 (7.2): criterion A level 4: ±2 kV, 5 kHz Electrical fast transient/burst EN 61000-4-4 (direct on signal lines) criterion A level 3: ±1 kV, 5 kHz Width ≥ 10 mm (smaller wheels on request) Material ferrous (μr>>1) Surge immunity EN 61000-4-5 EN 50121-3-2 (7.3): criterion B ±2kV, 1.2/50 μs Shape involute gear (DIN 867) Conducted radio frequency EN 61000-4-6 EN 50121-3-2 (7.1): criterion A 0.15 … 80 MHz, 10 Vrms, 80% AM, 1kHz Radio frequency emission (conducted) EN 55011 Ambient conditions Operating temperature -40 … 120°C Storage temperature -40 … 120°C Protection class IP67 / IP68 (24h, 1m under water) / IP69K exceeds EN 50155 (12.2.12) www.baumer.com EN 50121-3-2 (4.1) Radio frequency emission (radiated) EN 50121-3-2 (6.1) Product Data Sheet, MTR_01 9 KHz … 150 KHz: no limits 150 KHz … 500 KHz: 99 dBμV/m, quasi-peak 500 KHz … 30 MHz: 93 dBμV/m, quasi-peak EN 55011 30 MHz … 230 KHz: 40 dBμV/m, quasi-peak 230 MHz … 1 GHz: 47 dBμV/m, quasi-peak 2 / 10 Compression ring kit Railway ZPX1-006 Speed Sensors MTR For LBFS series: sliding Speed connection sensors for railway applications Overview of variants The sensor design is based on a platform which allows the generation of variants. Within the platform , 8 modules can be selected and are listed on the following pages: 1) Electronics 2) Mechanical interface 3) Cable outlet 4) Cable and screening 5) Target (gear wheel) 6) Direction definition 7) Cable end termination 8) Cable length Baumer is experience in the design of customised variants. If you do not find a the right variant in this document, please contact Baumer. 1) Electronics variants with 1 supply voltage Electronics variant Type code Schematics Single channel with voltage output U1P Dual channel with voltage output (quadrature signals) UQP www.baumer.com Product Data Sheet, MTR_01 3 / 10 Compression ring kit Railway ZPX1-006 Speed Sensors MTR For LBFS series: sliding Speed connection sensors for railway applications 1) (continued) Electronics variants with 2 independent supply voltages Electronics variant Type code Sensor with 2 galvanically separated systems: UCP Schematics System 1: dual channel with voltage output (quadrature signals) System 2: galvanically separated copy of signal A from system 1 (voltage output) Sensor with 2 galvanically separated systems: UEP System 1: dual channel with voltage output (quadrature signals) System 2: galvanically separated copies of signal A and B from system 1 (voltage output) www.baumer.com Product Data Sheet, MTR_01 4 / 10 Compression ring kit Railway ZPX1-006 Speed Sensors MTR For LBFS series: sliding Speed connection sensors for railway applications 2) Mechanical variants (interface on gear wheel side) Mechanical variant Type code Flange housing FSP 42 mm bore distance 29mm head length With mounting pin Flange housing: 42 mm bore distance 29mm head length Without mounting pin Other interfaces www.baumer.com Drawings FSN Available on request Product Data Sheet, MTR_01 5 / 10 Compression ring kit Railway ZPX1-006 Speed Sensors MTR For LBFS series: sliding Speed connection sensors for railway applications 3) Cable outlet variants Cable outlet variant Type code Straight cable outlet S L-shape (angled) cable outlet A Drawings B C D E F G cable H Other cable outlets www.baumer.com Available on request Product Data Sheet, MTR_01 6 / 10 Compression ring kit Railway ZPX1-006 Speed Sensors MTR For LBFS series: sliding Speed connection sensors for railway applications 4) Cable and screening Cable variant Type code Details Screen not on housing (standard variant) SZN Cable: 13mm silicone Protective tube: none Screening: cable screening not connected to sensor housing Cable: 13mm silicone Protective tube: none Screening: cable screening connected to sensor housing Screen on housing: SZS Other cables and protective tubes Available on request 5) Target (gear wheel) Gear wheel Type code Details Module 1.0 (involute gear) 10 Air gap range: 0.1 … 0.8 mm Module 1.5 (involute gear) 15 Air gap range: 0.1 … 1.2 mm Module 2.0 (involute gear) 20 Air gap range: 0.1 … 1.5 mm Module 2.5 (involute gear) 25 Air gap range: 0.1 … 1.6 mm Module 3.0 (involute gear) 30 Air gap range: 0.1 … 1.6 mm Other gear wheel geometries Available on request 6) Direction definition Direction of rotation Type code A leads B if wheel rotates from pin/pin hole towards center of sensor S A leads B if wheel rotates from center of sensor towards pin/pin hole T Drawings Not applicable as single channel Z sensor www.baumer.com Product Data Sheet, MTR_01 7 / 10 Compression ring kit Railway ZPX1-006 Speed Sensors MTR For LBFS series: sliding Speed connection sensors for railway applications 7) Cable termination Cable termination Type code Tinned litz wires (standard variant) C Details Connection and wire assignment see 1) electronics Connector or other termination Available on request 8) Cable length Cable length in cm Type code Details 1m 0100 Measured from flange (straight housing) or center line (angled housing) to end of sheath 2m 0200 Measured from flange (straight housing) or center line (angled housing) to end of sheath 5m 0500 Measured from flange (straight housing) or center line (angled housing) to end of sheath Other lengths www.baumer.com up to 10m possible, indicate in cm, e.g. 0250 = 2.5m Product Data Sheet, MTR_01 8 / 10 Compression ring kit Railway ZPX1-006 Speed Sensors MTR For LBFS series: sliding Speed connection sensors for railway applications Installation information (general) Setup sensor to gear wheel Details Working distance The allowable air gap range is dependent on the gear wheel and is listed in the section 5) target. The closer the sensor is mounted to the gear wheel the more stable the signals will be. During operation, the gear wheel must not touch the front face of the sensor, as this might damage the sensor. Alignment of sensor to wheel In order to get optimal signals, the sensor should be centered with respect to the toothed gear. This means that side offset should be kept minimal. Mechanical interface Details Clamping of cable Worst case conditions: Sensor is mounted horizontally Cable is not bent until first clamp Vibrations class: EN 61373 category 3 (wheel axis) In worst case conditions, the first clamping point of the cable must be at maximal L=500mm. Please consult Baumer if longer free cable length is required. Pull out force The sensor variant with the silicone cable has a high pull out force 200 N. Installation aid Alignment pin (standard) Connection of wires The color designation of the wires is listed in section 1) electronics. www.baumer.com Product Data Sheet, MTR_01 9 / 10 Compression ring kit Railway ZPX1-006 Speed Sensors MTR For LBFS series: sliding Speed connection sensors for railway applications Ordering code The ordering code for the railway speed sensor is composed as follows: Sensor series Railway speed sensor . - . . / MTR 1) Electronics Single channel with voltage output Dual channel with voltage output (quadrature signals) Sensor with 2 galvanically separated systems (1 copy) Sensor with 2 galvanically separated systems (2 copies) 2) Mechanical variants Flange housing with pin (bore distance 42mm, head length 29mm) Flange housing without pin (bore distance 42mm, head length 29mm) 3) Cable outlet variants Straight cable outlet L-shaped (angled) cable outlet (0°) Angled cable outlet (45°) Angled cable outlet (90°) Angled cable outlet (135°) Angled cable outlet (180°) Angled cable outlet (225°) Angled cable outlet (270°) Angled cable outlet (315°) U1P UQP UCP UEP FSP FSN S A B C D E F G H 4) Cable and screening Screen not connected to housing (silicone cable, no protective tube) Screen connected to housing (silicone cable, no protective tube) SZN SZS 5) Target wheel Module 1.0 Module 1.5 Module 2.0 Module 2.5 Module 3.0 10 15 20 25 30 6) Direction definition A leads B if wheel rotates from pin/pin hole towards center of sensor A leads B if wheel rotates from center of sensor towards pin/pin hole Not applicable as single channel sensor 7) Cable termination Tinned litz wires S T Z C 8) Cable length (in cm) 1.5 meter cable length 2 meter cable length 5 meter cable length 0150 0200 0500 Customer specific variants with options not shown in this document are available, please contact Baumer for further details. Example: MTR.UQP-FSPS.SZN.20TC/0500 Railway speed sensor Dual channel with voltage output (quadrature signals) Flange housing with pin (bore distance 42mm, head ength 29mm) Straight cable outlet Screen not connected to housing (silicone cable, no protective tube) Module 2.0 A leads B if wheel rotates from center of sensor towards pin/pin hole Tinned litz wires 5 meter cable length www.baumer.com Product Data Sheet, MTR_01 10 / 10