cPCI-FRM11 User’s Manual (Rev 1.1)
-
11
- http://www.daqsystem.com
[Photo-coupler Digital Input/Output]
DIN7..4
DIN_COM1
IN7..4
2.4K
VCC
DIN3..0
DIN_COM0
IN3..0
2.4K
VCC
< Photo coupler input>
D O U T
3..0
DOUT_COM0
OUT3..0
1K
VCC
D O U T
7..4
DOUT_COM1
OUT7..4
1K
VCC
<Photo coupler output>
[Figure 4-4. Photo-coupler Input/ Output circuit]
The input resistance is 2.4K
Ω(
ohms) thus the flow current is about 5mA when 12V input is applied
and about 10mA when 24V power applied. Maximum operation input voltage is from 9V to max 24V.
The output current is limited by output resistance, the output resistance is 1K
Ω(
ohms). Continuous
output current has to be used under 5mA at VCC. The user can change the Input/Output resistance for
special operation.
