SIK 21

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Rugged Silicone Keypad

The SIK 21 Num is a numeric keypad with a rugged silicone surface, having been specifically designed for use in harsh environments, rugged applications, wet room applications and machine control.

Applications for this keyboard include military and emergency services, cold store, logistics/fork lift trucks, food production/catering, industrial equipment control and in other fields of activity where extreme environmental conditions are encountered.

The rugged silicon surface protects against dust and liquid ingress, being hermetically sealed to protect the entire keyboard, with the unit meeting the IP65 rating for fluid protection. This new keypad technology and the design of the unit allows operators to work seamlessly even when the operators need to wear protective gloves. The key surface provides enhanced protection against hard use by making use of a special PU coating to provide long term abrasion protection.

One special feature of this keyboard/keypad is the use of backlighting on each of the key buttons, providing users with enhanced key location and selection in harsh and limited lighting conditions. The underside of the keyboard features integrated screw threads arranged in a 75mm VESA mounting arrangement for ease of integration and mounting.

Possible options include:

Custom key graphics and product branding, epoxy coating, subject to quantity requirements. With the ability to offer rapid software design, electronic and embedded software development and final in-house testing, PrehKeyTec has been the partner of choice in many demanding applications and requirements in the field of data entry solutions. 

The SIK 21-Num keypad can also be offered as a base system onto which customer specific requirements are engineered into the solution, these could include: custom layout, key markings and final electronic hardware performance specification, this allows the customer to have a completely tailored solution which meets their exact requirements.

Technical Data


Features subject to build and final configuration Illuminated USB Keyboard rugged silicone surface
Key illumination can be adjusted in duration and intensity
Software update via USB interface
Resistant to liquids, such as: - hand lotion, sweat, soap, Detergent, motor oil, gear oil, diesel, Alcohol, antifreeze etc.
Keys resistant to abrasion (PU-coating)
Reliability Dust-tight and protected against water jets, rated to IP65
Temperature Operating -30° C to + 50° C, storage -30° C to 70° C
Key layout International, UK, German or Custom, 18 mm key pitch
Colour Black (similar to RAL 9011)
PC connection USB interface (<500 mA including lighting), others available on request
Lighting Red LED on each key
Life > 1 million operations per key
Compliance 1) CE
2) EN 55022:2010 + AC:2011 Class B, FCC Part 15 Subpart B Class A. Electro-magnetic field according to DIN EN61000-4-3, 30 V / m.
3) EN 55024:2010, ESD Electrostatic Discharge according to EN61000-4-2 ±20kV air discharge, ±8kV direct discharge.
Environmental 1) Vibration MIL -STD 810G; Method 514.6 - Functional
2) Mechanical Shock MIL STD 810G; Method 516.6, Procedure 1
3) Thermal Shock -40° F to +158° F/-40° C to +70° C
4) Salt Fog MIL -STD 810G (8 hours of 5% solution at 35° C)
5) Solar Radiation IEC 68-2-5 Procedure A for 3 d

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