AccuLoad IV Installation & Maintenance Manual
Installation 29
3.5.5.1 A4B I/O Index Numbering
The following table provides details about configuring the A4B board’s I/Os.
3.5.5.2 A4B DIP Switch Settings
The following table provides information about S1 DIP switch settings on the A4B board.
3.5.6 A4I Board
The A4I board is an optional electronic module for the ST, QT, and N4 models, as well as the SA model’s
FCM component. It provides 20 AC digital outputs and 10 inputs that can be used in the following ways:
• Additive meter pulse inputs
• General purpose DC digital inputs
• Interface with up to 10 metered injectors
You can use multiple A4I boards on the AccuLoad, as follows:
Table 11: A4B I/O Index Numbering
Terminals Type of I/O AccuLoad Configuration Index Number
TB8 AC digital output Digital outputs 26 through 30
TB9 AC digital output Digital outputs 20 through 25
TB10 AC digital output Digital outputs 15 through 19
TB11 AC digital input Digital inputs 12 through 15
TB12 DC digital input or output Digital Inputs 16 through 19
or digital outputs 31 through 34
TB13 DC digital input or output Digital inputs 20 through 23
or digital outputs 35 through 38
PT1 Meter pulse inputs Meter pulse inputs 9 through 14
Table 12: A4B DIP Switch Settings
Switch Setting
S1-1 Factory use
S1-2 Reserved
S1-3 Reserved
S1-4 Reserved
S1-5 Reserved
S1-6 Clear pairing information
S1-7 Off for ST, QT, and N4 models
Board set selector for SA model
S1-8 Off for ST, QT, and N4 models
Board set selector for SA model
Table 13: Maximum Number of A4I Boards
Model A4I Boards
ST Up to two externally
QT Up to two externally or internally
N4 Up to two, but only one may be
installed internally
SA (FCM component) Up to four externally or internally
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