Wiring Switches and Inputs on Apollo
There are 16 inputs on the Apollo III (15 available for your use as X0 is reserved for the drive fault signal). These can be used for limit/home switches, tool changer signals, alarm conditions, or most anything else.
Note: To learn how to set up limit switches, go to Setting up Limits and Homing.
As shown below, the inputs are located on the main green terminal block (note: your Apollo board should have black colored terminals for the outputs, not green as shown on the right side of this board).
Each input has an LED that shows the current state of the input. Both the LED and input are labeled with the input name. The inputs run from X0, up to X15. If the LED is on, then the input is activated. Different configurations can be selected for each input by using the jumpers near the bottom right of Apollo III. Each jumper corresponds to an input. For example, the jumper labeled X10 corresponds to the input terminal abeled X10 and the LED X10.
There are 3 jumper positions. Position 1 is the jumper in the lower position across the bottom 2 pins. Position 2 is the jumper in the upper position across the top 2 pins. Position 3 is the jumper removed (can be placed on jst the top or bottom pin with the other side of jumper not connected to any pin so that you can easily use it again if needed).
Input X0 is configured as drive fault by default.
DO NOT connect anything to X0. It could damage your drives or Apollo III motion controller.
There are helpful videos on our youtube channel:
Standard 24V Inputs
For a standard 24V input, place the jumper on the bottom two pins. Next, connect C0+ to 24V and C0- to GND on the input terminals (should already be jumper in place from factory for this). In the example below, all the inputs are set up as standard 24V inputs.
Then connect the input to the input terminal on the middle row (X1, X2, etc.). See the diagram below.
To activate the input, 24V must be supplied to the input. A floating signal or a ground will not turn on the input. The LED corresponding to the input will turn on brightly when the input is activated.
If the switches are not functioning or not reading in remove the switch and place a jumper wire between C0+ and the input (such as X1, X2 or X3..). If the LED on the Apollo board turns on than it is an issue with the proxy switch.
Sinking Inputs (NPN)
For most NPN proxies place the jumper on the top two pins. Then connect the signal into the corresponding input. See the example below.
If the proxy has an internal pull-up resistor, depending on its size, it could require the jumper to be completely removed. Use a 3.9k ohm resistor and connect it between XSL and C0+.
Below is an example of a 24V NPN proxy with an internal pull-up resistor. The jumper on the Apollo III must be completely removed for this to work.
Sourcing Inputs (PNP)
For PNP proxies place the jumper on the bottom two pins. Then connect the signal into the corresponding input.
If the switches are not functioning or not reading in remove the proxy switch and place a jumper wire between C0+ and the input (such as X1, X2 or X3..). If the LED on the Apollo board turns on than it is an issue with the proxy switch.
See more information about proxy switches at the following link:
Wiring Prox Switch Input
Keywords: Limit switches, switches, home switch, jumpers, proxy, prox