Omega Speaker Systems LCIC-WIM-BEN Appendix a I/O & the LED Display, General Notes about the I/O

Appendix A: I/O & the LED Display

A.1 General Notes about the I/O

*The digital I/O is available on CONN6 (15 pin Dsub).

*Digital Outputs

The outputs are opto-isolated 300mA 50V solid state relays. When activated (status LED is on), they switch the OUTPUT x (x=1,2,3, or

4)to I/O VOLTAGE OV. Hence the load would normally be connected between OUTPUT x and the I/O VOLTAGE+.

*Digital Inputs

The digital inputs are designed to work with either npn or contact input devices. They are activated by an external device pulling INPUT x (x=1,2,3,or 4) down to I/O VOLTAGE OV.

To work in this way an external IO VOLTAGE+ (in the range 10-30V) must be present.

* Analog Output

The analog output signal is set by a 16 bit DAC and appears on pin12 of CONN6. The output is with respect to the LCIC_WIM board ground (not the I/O 0V). The board ground appears at

pin13 of CONN6. The analog output control is application dependent.

48