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Computer Hardware & Peripherals

We are leaders in the market for providing best range of Metal Keyboards, Membrane Keyboard, PC Compatible Sealed Keyboard Panels, Illuminated Keyboards and Silicon Rubber Keyboard

Metal Keyboards

Metal Keyboards are made using stainless steel material or aluminium which makes them very tough and can be used in very harsh environments. The switch elements are embedded inside the stainless steel or aluminium due to which they are completely protected from any external abuse. Thus these are also termed as vandal proof keyboards.
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Membrane Keyboard

  • Current/Voltage Rating 10 mA at 24 VDC (Max) in to resistive load only
  • Contact Resistance 10-150 ohms depending on track length.
Membrane keyboard, These membrane keypads comprise of a Snap Dome Switch and a screen printed (with Silver Alloy Paste) polyester layer, which is used as a base and for the circuit. A layer of Polyester or Polycarbonate covers and seals this assembly using Industrial Grade Adhesives made by manufacturers like 3M, Avery Dennison, etc. These type of sealed keyboards can be offered in any size and shape and are made as per customer's specifications and requirements.
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PC Compatible Sealed Keyboard Panels

  • Contact Arrangement SPST, Normally Open.
  • Current/Voltage Rating 10 mA at 24 VDC (Max) in to resistive load only
  • Contact Resistance Compatible with MOS, TTL & DTL Circuits.
  • Contact Bounce Less than 10 milliseconds at make & 20 milliseconds at break.
  • Key Travel 380 microns.
  • Life Expectancy One million to 3 million operations per switch.
  • Operating Temperature -20oC to + 65oC.
  • Humidity 95% RH at 40oC.
  • Base Glass Epoxy PCB FR4 Grade in thicknesses ranging from 0.4 mm to 3.2 mm.
  • Plating Gold Over Nickel; Bright Acid Tin.
  • Adhesives Industrial Grade from 3M.
  • Overlays Different types of Polyesters from Autotype

These are Industrial Sealed Keyboards which can be connected to a computer directly as the switches are programmed to give an ASCII code through a PS2/USB output. The Industrial Sealed Keyboards can be customized as per requirement not only by way of size, shape, number of switches, etc., but by even programming each switch to give a customized code. SBL has tied up with Sprintek USA who offer different type of ICs/EEPROMs that can offer various types of configurable PC based keyboards.

Industry :

Industrial Electronics, Process Controls, Defense Equipment, etc.

Applications:

PLCs, CNC based Machine Tools, Special Purpose Machines (SPMs), Defense Applications, etc.

Technology :

PC based keyboards are programmed to offer ASCII codes by using special ICs/EEPROMs. These ICs/EEPROMs are programmed to offer the code as per customers requirements. These Chips can configure up to 256 switches and can also control 128 LEDs. SBL offers both the Hardware (interface cards) and the software programming required in customized versions. Besides offering the PC based keyboard switches, Sealed Touchpads are also offered to make an integrated PC based Sealed Keyboards with Touchpad.

Overview

Industrial processes are now controlled more and more by computer systems. All such computers used are usually located in Shop Floor environments, which by any standards tend to be unclean. Normal switch keyboards used to operate such systems are always affected by the harsh environments in the Shop Floor area.

SBL therefore offers a Industrial Sealed PC compatible keyboard which can with stand these harsh conditions prevailing on Shop Floors or other areas. The Keyboard is similar in construction to the Snap Dome Sealed Keyboard. It is housed in an IP55 grade enclosure and can be used as a desktop device. Keyboards with out enclosures can also be provided for direct assembly on the Panels.

Besides the standard 104 switch keyboard (with Trackpad) SBL can also customize the layouts and size of such keyboards. SBL also offers the freedom of using customized ASCII codes to suit every requirement.

Features
  • Replaces the normal ASCII Keyboard with respect to the software, dimensions, circuits, legends, etc. No complicated fitments or programming is required.
  • Just plug in the PS2/USB socket into the Keyboard port and it's ready to use!
  • Industrial grade components used to withstand harsh environments.
  • Multiple data entry protection provided. Auto reset facility offered.
  • IP55 Grade Enclosures offered.
  • Function Keys can be programmed as per Customer's requirements.
  • Additional function keys can be offered.
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Illuminated Keyboards

  • Specifications for Illuminated Keyboards (Using Omron switches) :
  • Contact Arrangement Contact Arrangement
  • Current/Voltage Rating 10 mA at 24 VDC (Max) in to resistive load only
  • Contact Resistance 100 Mega Ohms (max).
  • Contact Bounce 5 milliseconds (max).
  • Key Travel 500 microns.
  • Operating Force 160 gram force.
  • Life Expectancy One million operations per switch.
  • Operating Temperature -20oC to + 65oC.
  • Humidity 85% RH at 35oC.
  • Base Glass Epoxy PCB FR4 Grade in thicknesses ranging from 0.4 mm to 3.2 mm.
  • Plating Gold Over Nickel; Bright Acid Tin.
  • Overlay Polyester, Silicon, Metal.
  • Adhesives Industrial Grade from 3M.
  • Specifications for Illuminated Keyboards (Using Snap dome switches) :
  • Contact Arrangement SPST, Normally Open.
  • Contact Resistance Compatible with MOS, TTL & DTL Circuits.
  • Contact Bounce Less than 10 milliseconds at make & 20 milliseconds at break.
  • Key Travel 380 microns.
  • Life Expectancy One million to 3 million operations per switch.
  • Humidity 95% RH at 40oC.
  • Overlays Polyester, Silicon, Metal.

Keyboards having illuminated switch areas are commonly termed as Illuminated Keyboards. Illumination can be of two types entire switch area or only for the text/legends. Illuminated is achieved by using a light source under the switch. In most of the cases, illuminated push buttons made by reputed manufacturers like Omron, Rafi, etc. are used.

Industry :

Consumer Electronics, Process Controls, Access Controls, Machine Tools, etc.

Applications:

Special Purpose Machines (SPMs), Water Dispensers, Elevators, Ultra Sound Machines etc.

Technology :

Illumination is achieved by using LEDs under the switches. The Overlay can be of different materials like Polyester, Metal Caps, Silicon, etc. where the illuminated portion is made translucent of semi-transparent to allow the light to pass through.

Illuminated Keyboards can be made by using snap domes, or push buttons where the LED is inbuilt in the switch self. These switches are assembled on a separate PCB which is then mounted behind the Overlay Panels and sealed. However, Illuminated Keyboards using snap domes can be made only by using a silicon material as the Overlay.

Overview

Illuminated Keyboards can be used in all types of environments especially where the equipment has to be used in areas of low lighting. They are also used in systems where it is necessary to highlight the functions in operation by illuminating the respective switches. These include Medical Devices, Access Controls, Machine Tool Controls, Elevators, as well as Defense applications.

Features
  • Illumination of Key Switch areas as well as for text/legends.
  • Various colour illuminations offered.
  • Illuminated keyboards using Polyester, Silicon, Metal Caps can also be offered.
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Silicon Rubber Keyboard

These Silicon Rubber Keyboards comprise of a Snap Dome Switch and a Glass Epoxy PCB, which is used as a base and for the circuit. A layer of Silicon material covers and seals this assembly using Industrial Grade Adhesives. These type of sealed keyboards can be offered in any size and shape and are made as per customer's specifications and requirements. Silicon Keyboards can also be offered by using a carbon contact instead of a snap dome arrangement. However, in this case the overall life of the switch will be relatively lower.
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Industrial Keyboard

These are Industrial Sealed Keyboards which can be connected to a computer directly as the switches are programmed to give an ASCII code through a PS2USB output. The Industrial Sealed Keyboards can be customized as per requirement not only by way of size, shape, number of switches, etc., but by even programming each switch to give a customized code. SBL has tied up with Sprintek USA who offer different type of ICsEEPROMs that can offer various types of configurable PC based keyboards.
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