Incremental encoders

• Информационные материалы

  Функции

  Incremental encoders (sin/cos 1 V_pp/RS422) with cable and connector, andor Synchro flange

  Incremental encoders deliver a defined number of electrical pulses per revolution, which represent the measurement of the traveled distance or angle.

  Incremental encoders operate on the principle of optoelectronic scanning of dividing disks with the transmitted light principle. The light source is a light emitting diode (LED). The light-dark modulation generated as the encoder shaft rotates is picked up by photoelectronic elements. With an appropriate arrangement of the line pattern on the dividing disk connected to the shaft and the fixed aperture, the photoelectronic elements provide two trace signals A and B at 90° to one another, as well as a reference signal R. The encoder electronics amplify these signals and convert them into different output levels.

  The following output levels are available:

  • Analog signals sin/cos with 1 V_pp level
    Better resolution can be achieved for encoders with sinusoidal signals by interpolating them in the higher-level controller.
  • RS422 difference signals (TTL)
    In the case of RS422 incremental encoders (TTL), the resolution can be improved by a factor of four by means of edge evaluation.

  Технические данные

  Product name	Incremental encoder with sin/cos 1 Vpp	Incremental encoder with RS422 (TTL)
  	6FX2001-3....	6FX2001-2....
  Operating voltage Vp on encoder	5 V DC ± 10 %	5 V DC ± 10 % or 10 ... 30 V DC
  Limit frequency, typ.	≥ 100 kHz (- 3 dB) ≥ 200 kHz (- 6 dB)	–
  Scanning frequency, max.	–	300 kHz
  No-load current consumption, max.	150 mA	150 mA
  Signal level	Sinusoidal 1 Vpp	TTL (RS422)
  Outputs protected against short-circuit to 0 V	Yes	Yes
  Switching time (10 ... 90 %) (1 m cable and recommended input circuit)	–	Rise/fall time t+/t- ≤ 50 ns
  Phase angle, signal A to B	90° ± 10°el.	90°
  Edge spacing, min. at 300 kHz	–	≥ 0.45 µs
  Cable length to downstream electronics, max.1)	150 m (492 ft)	100 m (328 ft)
  LED failure monitoring	–	High-resistance driver
  Resolution, max.	2500 S/R	5000 S/R
  Accuracy (in angular seconds)	± 18 mech. × 3600/number of signals/revolution z	± 18 mech. × 3600/number of signals/revolution z
  Speed, max.
  Electrical	(18 × 106 rpm)/number of signals/revolution (at - 6 dB)	(18 × 106 rpm)/number of signals/revolution
  Mechanical	12000 rpm	12000 rpm
  Friction torque (at 20 °C (68 °F))	≤ 0.01 Nm (0.09 lbf‑in)	≤ 0.01 Nm (0.09 lbf‑in)
  Starting torque (at 20 °C (68 °F))	≤ 0.01 Nm (0.09 lbf‑in)	≤ 0.01 Nm (0.09 lbf‑in)
  Shaft loading capacity
  n ≤ 6000 rpm
  Axial	40 N (8.99 lbf)	40 N (8.99 lbf)
  Radial at shaft extension	60 N (13.5 lbf)	60 N (13.5 lbf)
  n > 6000 rpm
  Axial	10 N (2.25 lbf)	10 N (2.25 lbf)
  Radial at shaft extension	20 N (4.50 lbf)	20 N (4.50 lbf)
  Shaft diameter
  Synchro flange	6 mm (0.24 in)	6 mm (0.24 in)
  Clamp flange	10 mm (0.39 in)	10 mm (0.39 in)
  Shaft length
  Synchro flange	10 mm (0.39 in)	10 mm (0.39 in)
  Clamp flange	20 mm (0.79 in)	20 mm (0.79 in)
  Angular acceleration, max.	105 rad/s2	105 rad/s2
  Moment of inertia of rotor	1.45 × 10-6 kgm2 (12.8 × 10-6 lbf‑in‑s2)	1.45 × 10-6 kgm2 (12.8 × 10-6 lbf‑in‑s2)
  Vibration (55 ... 2000 Hz) to EN 60068‑2‑6	≤ 300 m/s2 (984 ft/s2)	≤ 300 m/s2 (984 ft/s2)
  Shock acc. to EN 60068‑2‑27
  2 ms	≤ 2000 m/s2 (6562 ft/s2)	≤ 2000 m/s2 (6562 ft/s2)
  6 ms	≤ 1000 m/s2 (3281 ft/s2)	≤ 1000 m/s2 (3281 ft/s2)
  Degree of protection acc. to EN 60529 (IEC 60529)
  Without shaft input	IP67	IP67
  With shaft input	IP64	IP64
  Ambient temperature
  Operation
  Flange outlet or fixed cable
  At Vp = 5 V ± 10 %	-40 ... +100 °C (‑40  … +212 °F)	-40 ... +100 °C (‑40  … +212 °F)
  At Vp = 10 ... 30 V	–	-40 ... +70 °C (‑40  … +158 °F)
  Leitung bewegt
  At Vp = 5 V ± 10 %	-10 ... +100 °C (+14  … +212 °F)	-10 ... +100 °C (+14  … +212 °F)
  At Vp = 10 ... 30 V	–	-10 ... +70 °C (+14  … +158 °F)
  Weight, approx.	0.3 kg (0.66 lb)	0.3 kg (0.66 lb)
  EMC	Tested in accordance with the guidelines for electromagnetic compatibility 89/336/EEC and the regulations of the EMC guidelines (generic standards)	Tested in accordance with the guidelines for electromagnetic compatibility 89/336/EEC and the regulations of the EMC guidelines (generic standards)
  Approvals, according to	CE, cULus	CE, cULus

  
  
  

  S/R = signals/revolution

  ¹⁾ With recommended cable and input circuitry of the downstream electronics, observe max. permissible cable length of module to be evaluated.