Trombetta Inc. is a manufacture of electrical equipment. BIRD is an abbreviation for Bi-directional Isolater Relay Delay (a computer of sorts). Both Trombetta and Intellitec make BIRD devices to control relays. Finally the relays in question are known as battery disconnect relays. That means that 12 volt power must be applied continually for the relay to pass current. This type of relay's normal state is disconnected.
Hope this helps.
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Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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