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5. ENVIRONMENTAL CHARACTERISTIC 

AMBIENT TEMPERATURE AND HUMIDITY(operational) 
 

Temperature : 0 ~50

˚

 

Humidity : 85

RH (without condensation) 

ALLOWABLE AMBIENT TEMPERATURE AND HUMIDTY(storage) 
 

Temperature : -20 ~ +60

˚

 

Humidity : 95

 RH(without condensation) 

VIBRATION 

The equipment shall not be damaged electrically and mechanically when the following 

vibration has been applied to the package keyboard. 

 

The testing method shall be in accordance with 201A of MIL-STD-202E 

 

No. of vibration :10 ~ 55Hz(to be logarithmically receiprocated for one minute) 

 Amplitude 

0.5mm(0.02in) 

 

Direction of vibration : direction of X,Y,Z 

 

Time of vibration : 2 hours 

IMPACT 

There shall be no abnormally in operation and appearance of the keyboard when an 

impact of 10G has been applied to package keyboard. 

The testing method shall be in accordance with 213B of MIL-STD-202E 

 
 

6.  DURABILITY AND RELIABILITY 

Every key on the this keyboard shall function stably for mean 10 million cycles key strokes under 
normal operation 

 

 

Summary of Contents for SKM-2040

Page 1: ...1 User s Manual M N SKM 2040 Sejin Electron Inc ...

Page 2: ... may cause harmful interference to radio communication However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or...

Page 3: ...ed OPERATING FORCE 60 25gf LIFE exceed 10 million operations 2 2 KEY TOP The keytop pull out force shall be 0 5kg or more at normal temperature during initial state The keytop shall be not pulled out by an ordinary typing operation 2 3 KEYTOP DEFLECTION Keytop deflection to on side shall be 0 8mm or less 2 4 VARIATIONS IN KEYTOPS 2 5 KEYTOP AND KEY ARRANGEMENT according to the attached drawing 2 6...

Page 4: ...applied at the rate of 3 to 6 times a second from any point within the region 45 conical to the vertical axis of key stem SLOW OPERATION The operating 1kg shall be applied at the rate of once a second from any point within the region 45 conical to the vertical axis of the key stem CHATTERING AND BOUNCE Operating force shall be applied according to Item OPERATING METHOD at 12V DC 0 2mA There shall ...

Page 5: ...comprises the key swith section and signal processing circuit The keyboard cable connects to the system with a 6 pin MINI DIN connector The following table shows the pin configuration and signal assignments Frame GND Shield 6 Pin Keyboard Data Keyboard Clock Vcc Ground Reserved Description 5 4 3 1 2 1 2 3 5 4 6 6 Pin ...

Page 6: ... The testing method shall be in accordance with 201A of MIL STD 202E No of vibration 10 55Hz to be logarithmically receiprocated for one minute Amplitude 0 5mm 0 02in Direction of vibration direction of X Y Z Time of vibration 2 hours IMPACT There shall be no abnormally in operation and appearance of the keyboard when an impact of 10G has been applied to package keyboard The testing method shall b...

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