Everything began at TSL-ESCHA in the 1980s with the PK2x series. Meanwhile, the push buttons of the PK2x series are available in a variety of designs. The special feature: a one-piece housing design. This has the great advantage that the switching chamber of the push buttons is hermetically sealed. The self-cleaning contacts and absence of moving parts make the push buttons wear and maintenance-free. These features are the basis for a long service life while facilitating trouble-free operation. And it keeps your costs down. On the front side, the switch housing of the PK2x series has no gaps where dust or water can penetrate, and nothing grates or jams when the push button is pressed. This allows you to use the push buttons of the PK2x series in very different regions. For example, in regions with very frigid temperatures such as Scandinavia or Siberia, as the door opening push buttons are frost-proof. And thanks to being dustproof, the PK2x series is also suitable for desert areas.

PK2x push buttons for every installation situation

The PK2x push button family offers the largest number of variations in TSL’s push button range. There are eight construction types alone. There are also various switching functions, LED colors and mounting rings, as well as a large selection of pictograms. This means that you can optimally adapt the push buttons to suit your vehicle and installation situation.

We want to provide our customers with tailor-made products, and installation should be as simple as possible. Construction type 7 and 8 push buttons, for example, come with an integrated mounting aid. We have also developed a centering assistance for you to protect against glass breakage caused by screws. The centering assistance also facilitates mounting, which saves you time and money when installing the push buttons. The glass mounting variant has a new modern and optimized design for installation in the glass cutout. The new spacer ring is now restrained and therefore adapts perfectly to the door design.

The railway standard EN 14752 is complied with

Thanks to the PK2x series’ modular structure, all available pictograms and tactile touch surfaces can be combined. Door opening push buttons PK23, PK28 and PK28-Z comply with the EN 14752 standard for side entrance systems for railway vehicles. This means that the push buttons’ active operation surfaces have a minimum dimension of 30 millimeters. Furthermore, the touch surface is raised by three millimeters, and the tactile symbols are raised by 0.5 millimeters. Due to the special design, the functionality becomes noticeable especilly for visually impaired persons. The push buttons also comply with the maximum switching force of 15 newtons required by the standard. The glass mounting variants for installation in the glass cutout now feature a modern and optimized design. The new spacer ring is much more delicate and thus fits perfectly to the door design.

PK2x series product highlights

  • Wide selection of different switching functions, touch surfaces, mounting rings, LED colors and pictograms
  • Configurable tone and light signals
  • Coating resistant to graffiti remover (additional option)
  • Space-saving installation thanks to a mounting cutout of only Ø43 millimeters
  • Complies with the current standards for rail vehicles (TSI-PRM, EN 50155, EN 45545-2 and EN 61373); some models also comply with the EN 14752 standard
PK29-S Taster von TSL um die Tür zu öffnen oder zu schließen

The push buttons of the PK2x series are versatile for use in rail vehicles and buses.

Switching principle
  • 4-point contact
  • Self-cleaning contacts
  • Integrated air-pressure compensation system (constant switching pressure under all environmental conditions)
Signaling
  • 12 individually configurable LED displays (high-end version): PK21, PK22, PK23, PK28, PK41 and PK-Z
  • 4 LED displays (economy version): PK25, PK26, PK27 and PK29
  • Luminous colors red, green
  • Orientation, confirmation or warning tones (individually parameterized)
  • Orientation tone and confirmation tone as continuous or intermittent tones max. 52 dB(A), depending on the installation
Environmental conditions
Switching cycles > 7 million
Operating temperature -40 … +80 °C
Degree of protection IP67
Electrical data
Nominal voltage 24 VDC, 36 VDC, 72 VDC, 110 VDC
Nominal current Up to 50 mA @ 24 VDC, depending on the version
Switching current Up to 200 mA, depending on the version
Switching function Normally open (NO), PNP or NPN

PK2x series variants at a glance on the basis of construction types

PK28-S Türöffnungstaster TSL rot
  • Function one-sided
  • Installation from front side with standard mounting ring
  • Visible screws
  • Application area: wall panel or door element
Tastfläche PK21-25

PK21
Touch surface flat
Pictogram flat

PK21_6led

6-LED standby signal plus 6-LED operation signal

Tastfläche PK21-25

PK25
Touch surface flat
Pictogram flat

PK25_4LED

4-LED standby signal

Tastfläche PK28-29

PK28
Touch surface raised
Pictogram tactile
EN 14752

PK21_6led

6-LED standby signal plus 6-LED operation signal

Tastfläche PK28-29

PK29
Touch surface raised
Pictogram tactile

PK25_4LED

4-LED standby signal

PK29-s Türöffnungstaster TSL gelb
  • Function one-sided
  • Installation from front side with standard mounting ring
  • Screws concealed by additional insert ring
  • Insert ring with text printing and/or braille embossing
  • Application area: wall panel or door element
Tastfläche PK21-25

PK21 with insert ring
Touch surface flat
Pictogram flat

PK21_6led

6-LED standby signal plus 6-LED operation signal

Tastfläche PK21-25

PK25 with insert ring
Touch surface flat
Pictogram flat

PK25_4LED

4-LED standby signal

Tastfläche PK28-29

PK28 with insert ring
Touch surface raised
Pictogram tactile
EN 14752

PK21_6led

6-LED standby signal plus 6-LED operation signal

Tastfläche PK28-29

PK29 with insert ring
Touch surface raised
Pictogram tactile

PK25_4LED

4-LED standby signal

PK27-S Türöffnungstaster grau
  • Function one-sided
  • Installation from front side; stepped mounting ring
  • Screws concealed by additional cover caps
  • Application area: wall panel or door element
Tastfläche PK22-26

PK22
Touch surface flat
Pictogram flat

PK21_6led

6-LED standby signal plus 6-LED operation signal

PK23-27

PK23
Touch surface raised
Pictogram tactile
EN 14752

PK21_6led

6-LED standby signal plus 6-LED operation signal

Tastfläche PK22-26

PK26
Touch surface flat
Pictogram flat

PK25_4LED

4-LED standby signal

PK23-27

PK27
Touch surface raised
Pictogram tactile

PK25_4LED

4-LED standby signal

PK41 Türöffnungstaster TSL orange
  • Function one-sided
  • Installation from front side with a screw connection pitch circle diameter of 76 mm; stepped mounting ring
  • Visible screws
  • Application area: wall panel or door element
PK23-27

PK41

Touch surface raised
Pictogram tactile

PK21_6led

6-LED standby signal plus 6-LED operation signal

Taster PKZ TSL-ESCHA
  • Function one-sided
  • Screwless installation from front side with Zentraflex mounting ring
  • Flush installation (reduces driving resistance and driving noise)
  • Pressure-tight thanks to Zentraflex mounting rings and closed switch housing
  • Ideal for usage in high-speed trains
Tastfläche PK21-25

PK21-Z

Touch surface flat
Pictogram flat

PK21_6led

6-LED standby signal plus 6-LED operation signal

Tastfläche PK28-29

PK28-Z
Touch surface raised
Pictogram tactile

PK21_6led

6-LED standby signal plus 6-LED operation signal

Taster PK28 TSL-ESCHA
  • Function one-sided
  • Installation from front side with a mounting cutout diameter of 74 mm
  • Back wall mounting with mounting claws
  • Visible screws
  • Application area: wall panel or door element
Tastfläche PK21-25

PK21-5
Touch surface flat
Pictogram flat

PK21_6led

6-LED standby signal plus 6-LED operation signal

Tastfläche PK21-25

PK25-5
Touch surface flat
Pictogram flat

PK25_4LED

4-LED standby signal

Tastfläche PK28-29

PK28-5
Touch surface raised
Pictogram tactile
EN 14752

PK21_6led

6-LED standby signal plus 6-LED operation signal

Tastfläche PK28-29

PK29-5
Touch surface raised
Pictogram tactile

PK25_4LED

4-LED standby signal

PK2x Glaseinbau einseitig TSL-ESCHA
  • Function one-sided with blind cover
  • Mounting of push button in the spacer ring
  • Integrated mounting aid
  • Visible screws (Photo: with cover ring)
  • Application area glass door
  • The following angles are available for adapting the housing to the door profile slope: 0°/6°/10°/15°/25°
  • Degree of protection IP67 (vehicle exterior)
  • Optional:
    • Screws concealed by additional insert ring
    • With text printing and/or braille embossing (see construction type 2)
Tastfläche PK21-25

PK21-3
Touch surface flat
Pictogram flat

PK21_6led

6-LED standby signal plus 6-LED operation signal

Tastfläche PK21-25

PK25-3
Touch surface flat
Pictogram flat

PK25_4LED

4-LED standby signal

Tastfläche PK28-29

PK28-3
Touch surface raised
Pictogram tactile
EN 14752

PK21_6led

6-LED standby signal plus 6-LED operation signal

Tastfläche PK28-29

PK29-3
Touch surface raised
Pictogram tactile

PK25_4LED

4-LED standby signal

  • Function double-sided
  • Mounting of push button in the spacer ring
  • Integrated mounting aid
  • Visible screws
  • Application area glass door
  • The following angles are available for adapting the housing to the door profile slope: 0°/6°/10°/15°/25°
  • Degree of protection IP67 (vehicle exterior)
  • Optional:
    • Screws concealed by additional insert ring
    • With text printing and/or braille embossing (see construction type 2)
Tastfläche PK21-25

PK21-2
Touch surface flat
Pictogram flat

PK21_6led

6-LED standby signal plus 6-LED operation signal

Tastfläche PK21-25

PK25-2
Touch surface flat
Pictogram flat

PK25_4LED

4-LED standby signal

Tastfläche PK28-29

PK28-2
Touch surface raised
Pictogram tactile
EN 14752

PK21_6led

6-LED standby signal plus 6-LED operation signal

Tastfläche PK28-29

PK29-2
Touch surface raised
Pictogram tactile

PK25_4LED

4-LED standby signal

  • Function one-sided
  • Front mounting
  • Screws concealed by snap-on cover ring
  • Exclusively raised touch surface
  • Application area wall panel or door elements
Tastfläche PK28-29

PK28
Touch surface raised
Pictogram tactile
EN 14752

PK21_6led

6-LED standby signal plus 6-LED operation signal

Tastfläche PK28-29

PK29
Touch surface raised
Pictogram tactile

PK25_4LED

4-LED standby signal

Acoustic signals

Orientation tone

Confirmation tone

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