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Figure 54 5V Toggle Switch Example
Note: Your 5V supply could come from TB2 on the Apollo I.
7.1.4 Sinking Inputs (NPN)
For most NPN proxys place the jumper on the top two pins. Then connect your signal into the corresponding input. See
the example below.
Figure 55 Standard NPN Proxy
If your proxy has an internal pullup, then you may have to completely remove the jumper. You will have to use a 3.9k
ohm resistor and connect it between XSL and C0+ (where S is your input number). For example, if you are using input
X5, connect a resistor between any of the C0+ terminals and the X5L terminal (located on the bottom row of the TB2
connector).
Below is an example of a 24V NPN proxy with an internal pullup resistor. The jumper on the Apollo I must be
completely removed for this to work.
Figure 56 NPN Proxy with Internal Pullup
Isolated Inputs
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