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There is single green 2-pin Phoenix connector on the on the right side of the board for
supplying the board with +5VDC. Pin 1 is the +5VDC input and pin 2 is the ground.
There is single black 3-pin Phoenix connector on the on the right side of the board for RS-
485 diagnostics. Pin 1 is the RT+ signal, pin 2 is the ground/shield and pin 3 is the RT-
signal.
A Prizm Diagnostics cable can be connected directly to this 3-pin connector or
through a stacked Mini4 Video Input or Output board.
NOTE: To complete the RS-485 diagnostics link from the surface to the subsea boars, the
Dual Sonar Board must be stacked onto a Mini4 Video Input or Output board to complete
the link over the multiplexer's fiber.
1.3.1 Dual Sonar Board Indicators and Controls:
LEDS:
There are 4 surface mount vertical LED indicators on the top of the board and 4 surface
mount right-angle LED indicators on the bottom of the board.
Top of Board
LED
Indication
D1 (Green)
Located at the top left of the board serves as an indicator that +5V DC is available to the
board. Supply voltage 5V to the board is selected via the placement of fuse F1 (or F2 or F3).
D2 (Green)
Located on the top center of the board, labeled 'FIBR A', provides an indication that the
transceiver module has detected the presence of an input signal on the fiber link. When 'ON'
indicates that this board has a good level of received optical power from the remote unit A.
NOTE: IF BOARD IS CONFIGURED AS AN INPUT, THEN THIS LED WILL BE OFF.
D3(Green)
Located on the top center of the board, labeled 'FIBR B', provides an indication that the
transceiver module has detected the presence of an input signal on the fiber link. When 'ON'
indicates that this board has a good level of received optical power from the remote unit B.
NOTE: IF BOARD IS CONFIGURED AS AN INPUT, THEN THIS LED WILL BE OFF.
D5(Green)
Located at the bottom right of the board serves as an indicator that +3.3V DC is operational
on the board. 3.3V is generated by the on-board DC-DC converter at U9.
Bottom of Board
LED
Indication
D10 (Green)
'ON' when sonar data is being sent out of the board on link A
D15 (Green)
'ON' when sonar data is being received into the board on link A
D16 (Green)
'ON' when sonar data is being sent out of the board on link B
D19 (Green)
'ON' when sonar data is being received into the board on link B
201630-xxx Mini4 Dual Sonar Board Manual, Preliminary
Page 4 of 14
2/23/09
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