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Here’s one of the simplest way to use our FABModules…. Hook up the following FABs together:
FAB2010 – XLR Input Module
FAB2110 – Input Transformer Module
FAB3010 – XLR Output Module
All that’s missing is Power, if you want to enable the -20dB Pad, Phantom Power and Polarity Reverse functions. Otherwise, it will still work without power applied. After all, it’s just an input transformer inserted in your signal chain.
Populated our FAB3010 XLR Output Module. There is a Logic controlled relay, used for Polarity Reverse function. All you need to do is apply a Logic “1” to the header pin (which can be +3.3V, +5V, or your V+ voltage) and it will trigger Polarity Reverse.
Received our FAB3010 XLR Output Module. Just to recap, the FAB3010 Module includes a relay-controlled Polarity Reverse. All you need to do is apply Logic “1” to the header pins (located on upper left corner) and it will switch the relays on/off. A Logic “1” can be anywhere from +3.3V to +5V, or up to your V+ voltage.
I need to make a Revision B board because I want to move the XLR jack farther out, so it won’t have any problems with clearances if you want to mount the XLR jack on a .125″ thick case panel. But other than that, I think it looks good.
Will try to populate this board in the next day or so, so I can test the Polarity Reverse logic control. I don’t foresee any problems, but the proof is in the pudding as they say.
FAB3010 is our XLR Output Module.
It features RFI protection, and a logic-controlled Polarity Reverse (via Relays). All you need to do is apply +5V to Pin1 of the Logic Header to reverse output polarity.