How to Set the Internal Jumpers and DIP Switches (Cortex 320)

Jumpers and switches location on the Cortex-320 main board

1 – Status input

The status inputs can all be individually set for separate grounds or for internal grounds with pull-up resistors. The factory default DIP switches position is in the both pull-up mode (IN position on all 4 inputs) and the internal ground mode (NO position all 4 inputs).

2 – Battery monitoring

The Metering Input 12 has a jumper (JP1) that allows measurement of the RTC battery voltage when in position YES. To display the correct battery voltage, the voltage range of the metering input 12 must be in the 5V position. Furthermore, the metering input ABC parameters must be set to: A=0, B=1, C=0, D=0 in the input’s configuration screen.

3 – Metering input

To configure the metering input in 0-5V or 0-60V voltage range, place the VOLTAGE RANGE jumper in the desired voltage range position (5V or 60V) and the AUDIO DETECT jumper in the NO position. By default, the metering input jumpers are set 0-5V.
If you want to use a metering input as an audio rectifier, place the AUDIO DETECT jumper in the YES position and the VOLTAGE RANGE jumper in the 5V position.

4 – Digital mode for metering input

The DIP switches S3 and S1 set an internal pull-up resistor on the metering input. When the METERING DIP Switches are in the IN position, the selected metering inputs are now usable as status input. To work properly, it’s necessary to place the VOLTAGE RANGE jumper of the selected metering inputs in the 5V position. When the selected inputs are open circuit, the metering inputs show approximately 2V (High).

5 – Relays

Relays 4, 5 and 6 can be SPST Form A or B. Place the jumper in NO position to have an SPST Form A relay or in NC position to have an SPST Form B relay. By default, the three relay jumpers are in NO position.

6 – Audio IN/OUT

These two jumpers configure the back-panel audio connector as either an input or an output. By default, the two jumpers are set for input operation.

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