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Elevator technology

Elevators must be safe and comfortable. Encoders from HEIDENHAIN, AMO, and RENCO make this possible. When installed on the main motor, brakes, shaft copying system, and doors, these encoders help the elevator car start gently, stop at just the right height, rapidly open and close its doors, and smoothly speed off again, all while meeting the highest safety standards. They also deliver the data needed for operational monitoring.

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Motor control

Ruggedness, reliability, and high resolution are key qualities of HEIDENHAIN rotary encoders. These characteristics make them proven and dependable motor control solutions on conventional traction elevators, able to meet the following elevator manufacturer requirements:

  • High speed
  • High travel height
  • Compact design
  • Low operating cost
  • Numerous electrical interfaces to downstream electronics
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KCI 419 Dplus: position and brake monitoring

With the pending arrival of the ISO 8100 standard, brake monitoring for Uncontrolled Car Movement (UCM) will become more important. The KCI 419 Dplus inductive elevator rotary encoder therefore delivers far more than position feedback for motor control on traction elevators. It can also detect the brake stroke without additional microswitches and measure the brake temperature. The KCI 419 Dplus is therefore optimally suited for brake monitoring. Via the EnDat interface, it even provides diagnostic data to downstream electronics, which can then derive the brake status (released or engaged) and the level of brake wear.

The new KCI 419 Dplus not only offers greater availability and safety; it also significantly reduces the time and effort necessary for installation, cabling, adjustment, and maintenance. The following capabilities are integrated in this device:

  • Motor feedback
  • Brake release monitoring
  • Wear indication data
  • Temperature monitoring
  • Online self-diagnostics
  • Digital data transmission
Product page KCI 419 Dplus Read the technology report

By virtue of its direct proximity to the motor and brake, the KCI 419 Dplus rotary encoder for elevators also provides meaningful temperature monitoring data without the need for additional sensors. These temperature data can then be used to infer the presence of malfunctions.

Because all of these parameters are transmitted on a single cable via the purely digital EnDat 2.2 interface, overall system cabling is greatly simplified. Further benefits include improved remote monitoring and predictive maintenance capabilities.

In addition to these completely new innovations, the KCI 419 Dplus also includes all of the familiar strengths of classic rotary encoders from HEIDENHAIN. Its inductive scanning method is highly immune to contamination and vibration, and is renowned for its operational reliability.

Product information KCI 419 Dplus rotary encoder
AEF 1300: the absolute specialist for elevators
ERN 1300: the incremental standard motor encoder
ECN 100: for particular demands

Future cableless elevators will move horizontally.
All thanks to encoders from HEIDENHAIN.

​​​​​​​Find out more about LINA 200

Shaft copying

For properly timed, jerkless braking, and exact positioning of the elevator car, its position in the shaft must be precisely measured and transmitted to the control. Absolute rotary encoders from HEIDENHAIN enable digital shaft copying with clear advantages:

  • The absolute position of the car is continuously available, even after a power outage.
  • Thanks to this continuously available actual position information, the car can be moved straight to its destination. 
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EQN 400

For particularly high shaft loads of up to 150 N axially and 350 N radially, the EQN 400 is available with a bearing assembly. This assembly decouples the encoder’s bearing from the forces and prevents overloading.

View the EQN 400

Door motors

Shorter elevator stopping times and higher transport volume can be attained if doors are opened and closed with speed and precision. The key to this is accurate and dynamic position measurement. HEIDENHAIN rotary encoders for door motors deliver the necessary rotational speed and position feedback in a highly compact design, with all models featuring an outside diameter smaller than 40 mm.

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ECI 1000 and EBI 1000
ERN 1023
RENCO R35i and R35iL

Easy implementation with EnDat

EnDat is the ideal interface for digital drive systems and position control loops using position encoder feedback. In particular, the interface’s purely serial design offers numerous benefits of great value to applications in the elevator industry. Purely serial data transmission via EnDat is:

  • Universal
  • High-performance
  • Communicative
  • Diagnostic
  • Safe

Implementation is made easier with the EnDat Master, or in the elevator industry, the EnDat Master Mini. Designed specifically for fast and cost effective implementation, it handles communication between the purely serial EnDat encoder and the higher-level application. For more information, see the Implementation Guide.

Find out more about the EnDat interface and its implementation
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