TB1005 Test Board
The TB1005 test board is provided for the convenience of evaluating the DS1005 controller (IB1005 + SB1005 boards). The board is basically a loopback, feeding relay outputs into sensor inputs of the DS1004. Schematic diagram of the test board's connections is shown below:
Relays 1-6 are wired into sensor inputs 1-6. They commutate "Vin", which is the voltage from the power source for the DS1005. When a relay is activated, this voltage is applied to a corresponding sensor input.
There are eight sensor inputs but only six relays. Remaining sensor inputs 7 and 8 are controlled by two buttons which play the same role as the relays. Push a button and a corresponding sensor input is triggered.