TSL-ESCHA PK2x push button – construction type 7

Versatile and durable

PK2x push button – construction type 7

• 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)
• Screws concealed by additional insert ring
• With text printing and/or braille embossing (see construction type 2)

Touch surfaces and LED variants

PK21-3 Touch surface flat Pictogram flat

6-LED standby signal plus 6-LED operation signal

PK25-3 Touch surface flat Pictogram flat

4-LED standby signal

PK28-3 Touch surface raised Pictogram tactile EN 14752

6-LED standby signal plus 6-LED operation signal

PK29-3 Touch surface raised Pictogram tactile

4-LED standby signal

About the PK2x Series

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 nine 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

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

Downloads

• Brochure Products for Busses
• Brochure Products for Door Area
• Brochure Products for Trains
• E1 PK2x
• ECE-R118
• PK2x Checklist
• PK2x Push Button Brochure