Italsensor TDT40 - Incremental Encoder + Tacho

Italsensor TDT40 Encoder FAQ

1. What is the Italsensor TDT40?
   The TDT40 is a combination incremental encoder and tachogenerator, featuring a stainless steel shaft and a square flange. It provides incremental encoder resolutions from 2 to 2700 pulses per revolution (PPR) and a tachogenerator output of 20 V per 1000 RPM.

2. Which shaft loads can it handle, and what are its mechanical limits?

   • Axial Load: 200 N
   • Radial Load: 200 N
   • Rotational Speed:
     • 4000 RPM continuous
     • 2000 RPM with a protection shaft
       These ratings ensure reliable performance in many industrial setups.

3. How much torque is required to start rotation?

   • Starting Torque at 25°C: 0.040 Nm (standard), 0.070 Nm (with protection shaft)
     This value indicates the initial effort needed to overcome static friction and begin shaft rotation.

4. What are the encoder’s inertia and bearing life specifications?

   • Moment of Inertia: 50 g·cm²
   • Bearings Life: At least 5 × 10? revolutions
     These figures point to a robust design with long operational lifespan.

5. How does the tachogenerator element work?
   The built-in tachogenerator produces a voltage proportional to speed, specifically 20 V per 1000 RPM. This output can be used for speed monitoring, control, or feedback systems.

6. What are the encoder’s electrical characteristics?

   • Max Output Frequency: Up to 100 kHz
   • Synchronous Index Output: Default on channel A (B – A+B optional)
   • No Load Supply Current: Up to 150 mA
   • Protections: Short circuit protection (LD2/PP2 outputs only) and polarity inversion protection (except for 5 V DC).

7. Which materials are used in its construction?

   • Flange: Thermally stabilized anticorodal aluminium
   • Housing: Aluminium that’s been passivated and painted with an inhibiting treatment rated up to 180°C
   • Shaft: Stainless steel
     This combination offers corrosion resistance, mechanical strength, and heat tolerance.

8. What are the environmental operating conditions?

   • Operating Temperature: -10°C to +70°C
   • Storage Temperature: -30°C to +80°C
   • Relative Humidity: Up to 98% (non-condensing)
   • Vibration Resistance: 10 g (10 to 2000 Hz)
   • Shock Resistance: 20 g (for 11 ms)
     These specifications make the TDT40 suitable for demanding industrial environments.

9. How heavy is the TDT40?
   The encoder weighs about 0.45 kg. This moderate weight simplifies installation while still providing a sturdy housing.

10. Where can I find more information or support?
    Consult the official Italsensor datasheet for drawings, detailed instructions, and application notes. For further assistance, contact Italsensor’s technical support or an authorized distributor.