Encoder

HTL-INCREMENTAL ENCODER SERIES SENC

Incremental encoders are the simplest and most commonly used type of encoder. They are suitable for monitoring speed, position, and direction of rotation. They can be connected to common PLC and PC control systems and are a very robust fundamental element of industrial control systems.

SERIES SENC

Automation systems often require a high level of risk minimization. In such systems, equipment with functional safety can be part of the solution. Wieland offers encoders with functional safety for almost any application or electrical interface requirement. These encoders are rated SIL3 (PLe) and enable safe operation in setup, production, and maintenance modes, significantly reducing operational risks.

FEATURES OF THE 
SAFE ENCODERS SENC

  • Speed or position monitoring up to SIL 3 and PL e for 1 axis, and up to SIL 2 and PL d for 2 axes
  • Special form fit with positive lock for hollow shaft
  • Compact 58 mm flange size with minimal space requirement in the machine
  • Flexible mounting options with hollow shaft, solid shaft, radial or axial connector
  • Compatible HTL output for fast safe inputs of the samos® PRO MOTION safety controller
  • Resolutions of 360 ppr and 1024 ppr
  • PUR encoder cable resistant to oil, UV, ozone, and solvents
  • More than 100,000 hours of operational life
  • Maximum peak speed of 9000 RPM and continuous speed of 4000 RPM

DESIGNED FOR MAXIMUM ROBUSTNESS AND HIGHEST SAFETY

Safe drive through keyed connection.
Robust mechanical design with an additional bearing in the cover.
A unique device for through hollow shafts that effectively prevents slipping with locking pins.

APPLICATIONS WITH SAMOS® PRO MOTION

  • Safe speed, direction of rotation, or position monitoring according to EN/IEC 61800-5-2
  • Standstill monitoring during commissioning or maintenance
  • Safe direction detection (SDI) for rollers, gate systems, or machines
  • Safely limited speed (SLS) during setup operation
  • Safely limited position (SLP) for rotary or linear axes
     

LEARN MORE ABOUT SAFETY CONTROL

ARCHITECTURE EXAMPLES

The integration of encoders for speed monitoring into a safety architecture can be achieved in various configurations. Depending on the required safety level and/or existing hardware, we present different solutions below.

NOTE

The use of safety encoders in a safety application requires external monitoring of the encoder signals. 
The safety modules offered by Wieland meet these requirements transparently for the user.

STANDARD INSTALLATION 
WITHOUT SIL CERTIFICATION

Safety level: 0

SOLUTION FOR 
MODULAR SAFETY

Safety level: up to SIL 3/PL e
 
Achieving Compliance for an Existing System
Seamless Integration:  ⊕⊕⊕
Cost-effective Solution:  ⊕⊕⊕
New Design
Seamless Integration:  ⊕⊕
Cost-effective Solution:  ⊕⊕

SOLUTION FOR 
INTEGRATED SAFETY

Safety level: up to SIL 3/PL e
 
Achieving Compliance for an Existing System
Seamless Integration: ⊕
Cost-effective Solution: ⊕
New Design
Seamless Integration: ⊕⊕⊕
Cost-effective Solution: ⊕⊕⊕

VARIANTS

SENC-58S 
with solid shaft
SENC-58H 
with hollow shaft

ACCESSORIES FOR SENC ENCODERS

Torque supports provide a high degree of rotational stability to prevent the encoder from rotating with the shaft. Flange adapters are used to flange-mount the encoder to a motor. 

With reducer sleeves, you can reduce the diameter of a hollow shaft encoder. PUR encoder cables with M23 connectors (encoder-side) and open wires (control-side) offer high flexibility, robustness, and resistance.

TECHNICAL DATA

SENC-58Sxx
SENC-58Hxx
TECHNICAL DATA
Function of Incremental Encoder:

Detection of positional or angular changes via square-wave pulses using photoelectric scanning.

Detection of positional or angular changes through square-wave pulses using photoelectric scanning.

Rated Voltage (UN)

24 V DC

24 V DC

Operating Voltage Range (U)

11 – 30 V DC

11 – 30 V DC

Galvanic Isolation Supply Circuit-Output Circuit 
Supply current

100 mA no-load current

100 mA no-load current

Electrical Specifications
Output Signals

Digital HTL Signals (11-30 V DC)

Digital HTL Signals (11-30 V DC)

Pin Configuration

A, A/, B, B/ for safe incremental pulses

A, A/, B, B/ for safe incremental pulses

Color coding of encoder cable (CABLE-M23CKW...)

A: gray, A/: pink, B: brown, B/: green, 0: red, 0/: black, +V: blue and green/brown, 0V: white and white/green

A: gray, A/: pink, B: brown, B/: green, 0: red, 0/: black, +V: blue and green/brown, 0V: white and white/green

Resolution

360 ppm and 1024 ppm

360 ppm and 1024 ppm

Current per channel pair

40 mA

40 mA

Short-circuit protection
reverse polarity protection
Mechanical specifications
Physical dimensions

58 mm

58 mm

Type of shaft

Solid shaft

Hollow shaft

Shaft diameter

10mm

14mm

Material (housing)

Powder-coated zinc die-cast

Powder-coated zinc die-cast

Material (flange)

Aluminum
 

Aluminum
 

Material (shaft)

AISI 303 stainless steel

AISI 303 stainless steel

Bearing

Series 6800  – sealed

Series 6803  – sealed

Maximum loads

Axial: 40 N, Radial: 80 N

Axial: 20 N, Radial: 40 N


Moment of inertia of the shaft

Less than 2800 g.mm²

Less than 2800 g.mm²

Static/dynamic torque

5 / 35 mN.m

10 / 85 mN.m

Maximum peak speed

9,000 RPM

9,000 RPM


Maximum continuous speed

6,000 RPM

4,000 RPM

Theoretical mechanical life - continuous maximum speed - 1/2 maximum load - according to ISO 281:1990, L10

Greater than 29.7 x 109 revolutions / 82,365 hours

Greater than 24 x 109 revolutions / 100,000 hours

Weight (approx.)

0.300 kg

0.280 kg

General data
Degree of protection according to DIN 60529

IP65

IP65

Ambient temperature / Storage temperature

-25°C to +85°C / -20°C to +85°C

-25°C to +85°C / -20°C to +85°C

Standards

EN/ IEC 61508, IEC 13849-1, IEC 61800-5-2, IEC 62061

EN/ IEC 61508, IEC 13849-1, IEC 61800-5-2, IEC 62061

Approvals

CE, TüV, cULus Listed

CE, TüV, cULus Listed

CAREFREE TO CE MARKING  - 
WITH THE WIELAND SAFETY EXPERTS

Safety has been our daily business – for more than 30 years. On the way to CE marking and safe operation, we are your reliable partner and contribute our experience to your project. Whether training or consulting: We put together your individual all-round carefree package for  thestandard-compliant implementation of your machines. We support manufacturers and operators either in specific sub-steps such as inspection and overrun measurement, risk assessment of machines or validation of safety functions according to EN ISO 13849-2, or we accompany them holistically through the CE process up to CE conformity assessment according to machine directives.
 

Carefree to ce marking of your Machines

DOWNLAODS

Safety - Catalog

0860.1 | 29 MB

Safety Service - Machine Safety

0875.1 | 477 KB

FAQ

How does a rotary encoder/incremental encoder work?

A rotary encoder is a sensor used to measure angular rotation, providing digital output signals that are decoded for evaluation. Therefore, rotary encoders are often referred to as encoders. There are two main types of rotary encoders: incremental encoders and absolute encoders. Additionally, a rotary encoder may be equipped with or without bearings.

Incremental encoders determine position by counting a specific number of pulses per revolution, including a zero pulse that repeats each revolution as a reference. By analyzing two different tracks offset by a quarter pulse, not only speed but also direction of rotation can be determined. Detection is achieved using a magnetic wheel, optical disk, or gear teeth flanks.

Which safety standards do the safe HTL encoders of the SENC series comply with?

The safe HTL encoders of the SENC series comply with the safety standards EN/IEC 61800-5-2. They provide safe speed, direction, and position monitoring.

 

Which applications do the safe HTL encoders of the SENC series support?

The encoders support applications such as safe speed, direction of rotation or position monitoring, standstill monitoring for commissioning or maintenance, safe direction detection (SDI) for rollers, door systems or machines, safely reduced speed (SLS) for set-up operation and safely limited position (SLP) for rotary or linear axes.

Up to which safety level (SIL) and performance level (PL) can the encoders be used?

The encoders can be used up to SIL 3 and PL e for one axis and up to SIL 2 and PL d for two axes.

What special features do the safe HTL encoders in the SENC series offer?

The encoders offer a special positive lock for hollow shafts, a compact 58 mm flange size, flexible mounting options (hollow shaft, solid shaft, radial or axial connector) and a compatible HTL output for fast, safe inputs on samos®PRO MOTION.

What resolutions are available for the safe HTL encoders in the SENC series?

The encoders are available with resolutions of 360 ppr and 1024 ppr, depending on the accuracy required.

How durable are the bearings of the hollow shaft encoders in the SENC series?

The bearings of the hollow shaft encoders have a service life of more than 100,000 hours.

How resistant is the PUR encoder cable of the safe HTL encoders?

The PUR encoder cable is resistant to oil, UV radiation, ozone and solvents.

What maximum speed can the safe HTL encoders in the SENC series achieve?

The encoders can have a maximum peak speed of 9000 rpm and a continuous speed of ... (the exact continuous speed would have to be added as it is not fully specified in the source text).

What are the advantages of the compact 58 mm flange size of the encoders?

The compact 58 mm flange size minimises the space required in the machine and enables easy integration into existing systems.

What advantages does the compatible HTL output of the encoders offer?

The compatible HTL output enables fast and secure inputs to samos®PRO MOTION, ensuring efficient and reliable data processing.

CONTACT

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Please contact our experts.

Call: +49 951 9324 999

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