Mindray WATO EX-55Pro, Service Manual

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2-25
Definition of alarm light board J1
Pin No. Signal Name Discription
1)
VPP 12V supply
2)
GND Ground
3)
SDA Main control board IIC data signal
4)
SCL Main control board IIC data signal
5)
VDD 3.3V supply
2.1.5.4 Encoder Board
User can rotate it to left or right, or press it down.
Definition of encoder board J1
Pin No. Signal Name Discription Note
1)
VCC 5V supply 0.06A
2)
A Encoder output A
High electrical level: [2.4, 5.25]V
Low electrical level: [0, 0.4]V
3)
B Encoder output B
High electrical level: [2.4, 5.25]V
Low electrical level: [0, 0.4]V
4)
S2 Encoder is pressed down
High electrical level: [2.4, 5.25]V
Low electrical level: [0, 0.4]V
5)
GND Ground /