Revolabs Solo Executive Operation Manual - Manual (Page 14)

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Using the Rear Panel DB25 Control Port
The DB25 Control Port allows the use of third party control and muting
systems, using parallel port IO (active low, open collector).
The pin-out status functions, shown below, provide system muting operations
via third party audio mixing products. Push the System Mute switch all the
way to the right to operate this feature. The Mute OUT indicators determine
individually muted channels and the SYS Mute IN mutes all channels by using
a programmable muting macro in the control device.
Connector Front View
DB25 Connector Pin ................. Function
Pin 1 ........................................... Mute – Channel 1 output
Pin 2 ........................................... System Mute – Input
Pin 3 ........................................... Mute – Channel 2 output
Pin 5 ........................................... Mute – Channel 3 output
Pin 7 ........................................... Mute – Channel 4 output
Pin 9 ........................................... Mute – Channel 5 output
Pin 11 ......................................... Mute – Channel 6 output
Pin 13 ......................................... Mute – Channel 7 output
Pin 15 ......................................... Mute – Channel 8 output
Pin 25 ......................................... Ground
Pin All Others.............................. Not Used
Please refer to the third party control device operating manual for more
information regarding setup and programming.