Omega XW-ED User Manual page 16

Each of the three input pins can be independently set to either have an internal 1.5k Pull Up or Pull Down and can be set to
be either Active High or Active Low. Internally supplied 3.3 power is available for biasing
Some typical Circuits are show below:
Debounce
Capacitor
Suggested
For Active High Select Normally Closed
For Active Low Select Normally Open
3 150 mA max. Using internal power or internal pullups will reduce battery life.
Relay or Switch
3.3V
P.8
P.2/3/4
P.7
For Active High Select Normally Closed
For Active Low Select Normally Open
Figure 24
NPN or N-MOS Transistor
Input
3.3V
P.8
P.2/3/4
P.7
Figure 26
Pulse / TTL Input
P.8
Do not Exceed
3.3V at Input Pin
P.2/3/4
P.7
For Active High Select Normally Open
For Active Low Select Normally Closed
Figure 25
PNP or P-MOS Transistor
Vext
Optional
External
Power
P.8
Do not
Exceed
3.3V at
P.2/3/4
Input Pin
P.7
For Active High Select Normally Open
For Active Low Select Normally Closed
Figure 27
3 .
3.3V
Input
3.3V
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