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The PosiGround Controller is the "brains" of the system. It determines,
displays, and transmits the operational status of the system and whether
the ground clamps are properly connected. It also controls the warning
alarm and final alarm outputs. The system is powered from 12V truck power,
so there are no batteries to wear out or change. The controller scans the
grounding circuit and PTO input 16 times per second to determine the
system status.
There are these electrical connections on the main connector:
•
12V power, this is connected to switched 12V truck power and
operates the entire system.
W
WARNING: All power circuits must be fused. Although there is an internal
10A fuse in the controller the wire to the controller must be fused to prevent
fires or electrical damage. It is the installer's responsibility to install a fuse with a
maximum rating of 10 amps.
•
Ground, this is connected to truck ground and the grounded
grounding reel.
•
Ground sense, this is connected to the insulated grounding reel and
the clamp module.
•
PTO input, this is connected to the PTO or engagement sensor to
determine the truck status. The controller can be programmed to
accept a variety of inputs for this, see Chapter 4 under the sections
"To program the engagement sensor pullup" and "To program the
engagement sensor polarity".
•
Warning alarm low output – this provides ground and is connected
to the ground side of the warning device. The power side of the
device must be connected to 12V truck power.
•
Warning alarm high output – this provides 12V power and is
connected to the 12V power side of the warning device. The ground
side of the device must be connected to ground. This output is not
provided at this time.
•
Final alarm low output – this provides ground and is connected to
the ground side of the device. The power side of the device must be
connected to 12V truck power. This output is not provided at this
time.
•
Final alarm high output – this provides 12V power and is connected
to the 12V power side of the warning device. The ground side of the
device must be connected to ground.
The two connections (provides ground and provides 12V power) are
provided to accommodate any type of warning or final alarm/shutdown
device, normally only one of these connections is used. For example, some
horns or lights will automatically ground one side when mounted, so the
provides 12V power connection would have to be used in this case. All of
the alarm outputs are internally protected from short circuits and voltage
spikes.
Page 4
672-H Manual
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