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1.13.2 ATO (Automatic Top-Off) Board Pin Positions and Harnesses
Connector From/To Harness # Pin # Function Voltage Wire Color
1 Output DV - Vat #1
Green
2 Output FV - Vat #1
Red
3 Output DV - Vat #2
Green
4 Output FV - Vat #2
Red
5 Output DV - Vat #3
Green
Solenoids
8074718 (FV)
8074717 (DV)
6 Output FV - Vat #3
Ground
Red
Top Off Pump
7 Top Off Pump Red
JIB Reset Switch
8074719
8 JIB Low Reset
16VDC
Black
9 24VAC DV - Vat #1
White
10 24VAC FV - Vat #1
Black
11 24VAC DV - Vat #2
White
12 24VAC FV - Vat #2
Black
13 24VAC DV - Vat #3
White
Solenoids
8074718 (FV)
8074717 (DV)
14 24VAC FV - Vat #3
24VAC
Black
15
J8
Top Off Pump & JIB
Reset Switch
8074719
16 Ground
16VDC
Red
1 24VAC Ret Orange
2 24VAC
24VAC
Blue
3
4
5 12VAC Ret Red
6 12VAC
12VAC
Brown
7
J4 (Rear) /
J5 (Front)
Transformer 8074553
8
1 DV - Probe Ground White
2 DV - Probe Red
3 FV - Probe Ground White
J1 - Vat #1
J2 - Vat #2
J3 - Vat #3
ATO RTD
8074655 - Vat #1
8074654 - Vat #2
8074654 - Vat #3
4 FV - Probe
Ohm
Red
1 16VDC Black
J6 Orange LED 8074555
2 16VDC Ret
16VDC
Red
1
2
3 Ground
4 RB7/DATA
J7
5 RB6/CLOCK
1 Ground Black
8074552
(Network Resistor)
2 CAN Lo Red
3 CAN Hi White
4
5
J10
Network Resistor
(pins 2 & 3)
or to next ATO Board
(4 & 5 vat units)
8074546
to next ATO board.
6
1 Ground Black
2 CAN Lo Red
3 CAN Hi White
4
5
J9 CM7 J6/J7 8074646
6