BL
one button, many shapes
Round or square, BL is the basic solution for all purposes.
BL at a glance
→ EN 81-70 push-button with raised symbol
→ Compliant to new EN81-70:2021+A1:2022 color contrast requirement (LRV)
→ Shot-peen stainless steel pressel avoiding unpleasant fingeprints on the button surface
→ Outer ring available in many shapes
→ Frontal mounting (no studs) with metal collar, fastening by jam-nut
→ Flush mounting without metal collar and pressel flush to the faceplate
→ Raised symbol with single, double or twin-light illumination (see details below)
→ IP51
A closer look
Raised symbol/number
Stainless steel EN 81-70 push-button with raised symbol. Outer ring available in different shapes.
Tactile Braille available for square BL buttons
Single, double or twin illumination
EN81-70:2021+A1:2022
Great contrast, better visibility
The EN81-70:2021+A1:2022 norm requires that luminance contrast between adjacent surfaces shall be evaluated in numerical light reflectance value (LRV).
The black metal ring added around BL frontal mount button provides enhanced luminance contrast to the surrounding faceplate.
Mounting
Front
The frontal mount version of the BL can be inserted in both round-shaped and square-shaped 30mm cut-outs.
When mounted on stainless steel faceplates, the additional black metal collar can be added to achieve full compliance with the newest EN81-70:2018 norm.
Flush mounting
BL most stylish version fits into squared-shaped 30mm cut-outs.
The pushbutton is back mounted with studs and is beautifully flush with the face plate.
Compliance with the newest EN81-70:2021+A1:2022 norm is achieved with the twin-lighting option.
Illumination
Single light
Upon activation, the button halo lights up in red or blue.
White illumination is also available on request for some pushbuttons.
By default, all DMG buttons are available primarily with this basic illumination pattern.
Double Light
Symbols are always white or green illuminated.
Upon activation, the button halo lights up while the symbol/number remains illuminated in white or green (the following combinations are available white-red, white-blue or green-red).
Twin light
DMG introduced the Twin-light solution as a way to enhance button visibility in darker cabins.
Twin light means that both the halo and the symbol of the button are permanently illuminated in WHITE.
Upon activation, the button lights up in RED or BLUE while the white light goes off.
This advanced illumination pattern is available for some DMG pushbuttons, including the BL.
Which electronics?
Screw terminals contact module
The screw terminals contact module is good for all types of modernizations. It requires a conventional wiring during installation.
It is suited for installations where no acoustic call acknowledgment is required.
Screw terminals contact module
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call acoustic acknowledge module
If an acoustic call acknowledge is required (compliance to EN81-70), the screw terminals contact module con be supplied with a separated small module generating an acoustic signal.
It requires conventional wiring during installation. This solution is suited for both car and floor applications.
JST connector
contact module
Best solution for pre-wired fixtures allowing an easy and fast “plug&play” connection.
A JST cable must be added to connect the push-buttons.
