RPM871-H14 
 
Photo Link Module
 
 
 
3/7
 
Terminal description
Terminal
Circuit
Function
Pin No
1, 4
GND
GND
Pin1 and pin4 must be connected to the
ground.
This Terminal must be left open.
Connect to Ground.
Power-down Control Terminal
CMOS Logic Level Input
When input is H, it will stop the receiving
circuit, Pin-PD current and transmitting
LED operation.
H : POWERDOWN
L : OPERATION
Receiving Data Output Terminal
CMOS Logic Level Output
When PWDOWN (5pin)=H, the RXD
output will be pulled up to VCC at
approximately 300k&.
Transmitting Data Input Terminal
H : LED (PWDOWN=L)
CMOS Logic Level Input
Holding TXD="H" status, LED will be
turn off approximately 45祍.
LED ANODE Terminal
Other power source can be used
difference between LEDVCC and VCC.
LED current depends on LED load
resistance value.
2
NC
PWDOWN
RXD
TXD
LEDA
Shield Case
3
5
6
7
8

VCC
VCC
For preventing from infection, connect
a capacitor between VCC (3pin) and
GND (4pin).
VCC
VCC
200K
LED
VCC
VCC
300k
PWDOWN
 
 
 
 
 
 
 
 
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