Specifications

1-14
1.10.2 ATO (Automatic Top-Off) Board Pin Positions and Harnesses
Connector From/To Harness #
Pin
# Function
Voltag
e
Wire
Color
1 Output DV - Vat #1
2 Output FV - Vat #1
3 Output DV - Vat #2
4 Output FV - Vat #2
5 Output DV - Vat #3
Solenoids
8074572 x1 (FV)
8074572 x2 (DV)
6 Output FV - Vat #3
Ground Orange
7 Top Off Pump Red
Top Off Pump &
JIB Reset Switch
8074671
8 JIB Low Reset
16VDC
Black
9 24VAC DV - Vat #1
10 24VAC FV - Vat #1
11 24VAC DV - Vat #2
12 24VAC FV - Vat #2
13 24VAC DV - Vat #3
Solenoids
8074572 x1 (FV)
8074572 x2 (DV)
14 24VAC FV - Vat #3
24VAC Orange
15
J8
Top Off Pump & JIB
Reset Switch
8074671
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
J3 - Vat #3
J2 - Vat #2
J1 - Vat #1
ATO RTD
8074655 - Vat #1
8074654 - Vat #2
8074621 - 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
2 CAN Lo Red
3 CAN Hi White
4 5VDC+ 5VDC Black
5 24VDC 24VDC Red
J10
Network Resistor
(pins 2 & 3)
or to next ATO Board (4
& 5 vat units)
8074552
6 Ground White
1 Ground Black
2 CAN Lo Red
3 CAN Hi White
4 5VDC+ 5VDC Black
5 24VDC 24VDC Red
J9 AIF J5 8074546
6 Ground White