4
3. ELECTRICAL SPECIFICATION
POWER SUPPLY VOLTAGE : +4.75 ~ +5.25V DC
POWER SUPPLY CURRENT CONSUMPTION : 250Ma max
SIGNAL INPUT VOLTAGE : -0.5 ~ +5.5V
KEY SWITCH MAXIMUM RATING : 5V DC 5Ma resistance load
CONTACT RESISTANCE : 800 ohm or less
KEY SWITCH INSULATION RESISTANCE : 100M ohm or more between terminal(at 250V
DC)
KEY SWITCH VOLTAGE : 250V AC(50/60 Hz)
OPERATING METHOD
NORMAL OPERATION
The operating force of 3kg Max, shall be 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 be no bounce and chattering should be within 10msec when measured using
the specially prepared chattering tester or synchroscope. Chattering and bounce are
defind as shown below.
A
B
C
A : C h a t t e r i n g
B : B o u n c e
