Tachogenerators Blind hollow shaft ø12 to ø16 mm Housing ø85 mm, bearingless configuration GT 7 Features –– Temperature compensation of tacho voltage as standard –– Open circuit voltage 10...60 mV per rpm –– Blind hollow shaft ø12...16 mm –– High signal quality due to patented LongLife technology –– Low moment of inertia –– No auxiliary energy source required GT 7 Technical data - electrical ratings Technical data - mechanical design Reversal tolerance ≤0.1 % Size (flange) ø70 mm Linearity tolerance ≤0.15 % Shaft type ø12...16 mm (blind hollow shaft) Temperature coefficient ±0.05 %/K (open-circuit) Protection DIN EN 60529 IP 55 Isolation class B Torque 1.5 Ncm Calibration tolerance ±5 % Materials Climatic test Humid heat, constant (IEC 60068-2-3, Ca) Housing: stainless steel / plastic Shaft: stainless steel Operating temperature -30...+130 °C Armature-circuit time-constant <4 µs Resistance Open-circuit voltage 10...60 mV per rpm Interference immunity EN 61000-6-2 IEC 60068-2-6 Vibration 10 g, 10-2000 Hz IEC 60068-2-27 Shock 100 g, 6 ms Emitted interference EN 61000-6-3 Connection Approval CE Screw terminal connector Cable 0.6 m 0.3 W (speed ≥5000 rpm) GT 7.16 Performance Rotor moment of inertia 0.4 kgcm² Weight approx. 110 g GT 7.16 0.6 W (speed ≥5000 rpm) 1 Rotor moment of inertia 0.55 kgcm² Weight approx. 180 g www.baumer.com/motion 10/12/2014 Performance Subject to modification in technic and design. Errors and omissions excepted. GT 7.08 GT 7.08 Tachogenerators Blind hollow shaft ø12 to ø16 mm Housing ø85 mm, bearingless configuration GT 7 Part number GT7.08L/4 GT7.16L/4 Open-circuit voltage 10 10 mV per rpm 20 20 mV per rpm 30 30 mV per rpm Open-circuit voltage 40 40 mV per rpm 60 60 mV per rpm Data according to type Off-load voltage Type Minimum load required depending on speed range [rpm] Armature resistance Armature inductance 0-3000 0-6000 0-nmax RL [kΩ] RL [kΩ] RL [kΩ] nmax [rpm] R A (20°C) [Ω] LA [mH] ≥5 ≥20 ≥45 ≥40 ≥90 ≥12 ≥48 ≥108 ≥96 ≥215 ≥27 ≥108 ≥243 ≥216 ≥223 9000 9000 9000 9000 6100 60 230 550 410 760 20 80 180 160 360 U0 [mV/rpm] GT7.08L/410 GT7.08L/420 GT7.08L/430 GT7.16L/440 GT7.16L/460 Maximum operating speed 10 20 30 40 60 Superimposed ripple (for τRC = 0.3 ms): ≤0.6% (peak-peak) ≤0.25% (rms) Replacement switching diagram U(n) U0 (n) 2A1 U(n) Tachogenerator R RL n -n C 2A2 -U(n) τRC≈R·C LA τA≈ RL Polarity for positive rotating direction: U(n) = U0 (n) 2A1: + RL ≈ U0 (n) for R > R L >> R A R A + RL 2A2: - (VDE) 2 www.baumer.com/motion Subject to modification in technic and design. Errors and omissions excepted. LA 10/12/2014 RA Tachogenerators Blind hollow shaft ø12 to ø16 mm Housing ø85 mm, bearingless configuration GT 7 Terminal assignment Accessories View A - Connecting terminal Mounting cone Polarity for positive direction of rotation Carbon brushes - 3 www.baumer.com/motion 10/12/2014 Subject to modification in technic and design. Errors and omissions excepted. + Tachogenerators Blind hollow shaft ø12 to ø16 mm Housing ø85 mm, bearingless configuration GT 7 Dimensions GT 7.08 - Open-circuit voltage 10...30 mV per rpm Option: with cable ø ø ø Motor shaft ø ø ø ø ø ø ød 12 14 15 16 ø Positive rotating direction GT 7.16 - Open-circuit voltage 40...60 mV per rpm Option: with cable Subject to modification in technic and design. Errors and omissions excepted. ø ø ø Positive rotating direction 4 www.baumer.com/motion 10/12/2014 Motor shaft ø ø ø ø ø ø ø ød 14 15 16