When you connect external devices to the RM2200D, you can not only exchange audio signals with them, but control signals too. Signals coming from external devices are connected to General Purpose Inputs (GPIs for short). Signals going out to external devices are connected to General Purpose Outputs (GPOs for short).
![[Warning]](../pics/warning.gif) | Warning |
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Before you are connecting any external signals to the RM2200D, make sure you have read and fully understand the technical specifications in this manual! (see Technical Specifications) Failing to do so can cause damage both to the RM2200D and any other equipment connected to it! | |
Here are two typical examples for using GPIOs: dimming the monitor signal using a GPI and switching on a red light when the RM2200D is On Air.
If you want an external signal to dim your monitor level, do the following:
Connect the external signal to one of the GPI contacts on one module in the DSP frame. Make sure you comply to the electrical specifications given later in this manual! (see Technical Specifications)
Start the RM2200D software in Configuration Mode. Select the tab Frame I/O. (see Frame I/O - Configuring the DSP Frame)
Find the connector you just used to connect the external signal to. Assign a descriptive label to the GPI used. If necessary, set up the input as inverted. This allows you to use both high- and low-active signals.
The input is now available as logic source. To use it to dim the monitor signal, go to the section Mod options and select it as Monitor dim source.
![[Tip]](../pics/tip.gif) | Tip |
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To check if a GPI (or other logic source) works properly, you can assign it as lamp source to any of the LEDs below the keys GP1…GP4. The LED should light up when the logic source becomes active. | |
If you want to switch on a red light when the microphone channels of the RM2200D are open, you can do the following:
Connect the red light electronics to one of the GPO contacts in the DSP frame. Make sure you comply to the electrical specifications given later in this manual! This is especially important if you need to drive an electrical load with the GPO and not just want to transmit a control signal! (see Technical Specifications)
Start the RM2200D software in Configuration Mode. Select the tab Frame I/O. (see Frame I/O - Configuring the DSP Frame)
Find the connector you just used to connect the external signal to. Assign a descriptive label to the GPO used. If necessary, set up the type of the output signal to either inverted, Pulse on or Pulse off. The first options inverts the signal state, the other two generate a pulse when the signal either becomes active (Pulse on) or inactive (Pulse off). Select the logic source which will drive this GPO. As a test, assign a key from the Master Control Module to it.
Upload the Config. Press the key you have just assigned as logic source. The read light should light up as long as the key is pressed.
Go back to the RM2200D software. Select the tab Frame I/O and find the microphone input signals. For each input, make sure the checkbox for the option On-Air Logic 1 is checked. This makes the logic source On-Air Logic 1 active anytime an input signal with this option set is on a fader channel and the fader is open.
Finally, select the logic source On-Air Logic 1 to drive the GPO for the red light.
Upload the new Config. Now, if you open any microphone fader, the red light signalisation should become active.