LOFA
TM
MC704
Panel Operation and Troubleshooting Manual
11
9M02-3000-A001-EN
Revision D
3.4 Battery Circuit Requirements
3.4.1 Battery Positive Connection
The electronic panel operates on either 12 VDC or 24 VDC electrical systems. The unswitched battery positive
connection to the panel is made at the weather-proof connector. The panel provides switched positive battery.
Protection for the unswitched battery positive circuit is dependent on specific equipment configuration. The
overload protection should not exceed 125% of the sum of all output currents plus 5 A for the panel. Powering the
panel through dedicated circuits with appropriate overload protection reduces the possibility of panel damage.
Circuit breakers are preferred over in-line fuses for circuit protection. Overcurrent protection devices should
ideally be located in a central location. If automatic reset circuit breakers are used, consideration of the
environment of the breaker is critical and may affect the trip point. The trip point of some circuit breakers can be
significantly reduced below the rated trip point if the circuit breaker is exposed to high temperatures.
WARNING
DISCONNECTING THE BATTERY WHILE THE ENGINE IS RUNNING MAY DAMAGE ELECTRICAL
COMPONENTS.
WHEN USING A BATTERY DISCONNECT SWITCH, CATTRON RECOMMENDS USING A 2-POLE
SWITCH TO DISCONNECT BOTH THE BATTERY AND ALTERNATOR OUTPUT.
3.4.2 Battery Negative Connection (Grounding)
WARNING
IMPROPER GROUNDING CAN CAUSE ELECTRICAL NOISE OR UNRELIABLE OPERATION AND
MAY DAMAGE THE PANEL OR OTHER COMPONENTS. ALL GROUND CONNECTIONS MUST BE
FREE FROM FOREIGN MATERIALS, INCLUDING PAINT, WHICH MAY INTERFERE WITH PROPER
GROUNDING.
A RELIABLE GROUND MUST BE PROVIDED FOR THE PANEL. CATTRON RECOMMENDS
THE GROUND CONNECTION BE MADE DIRECTLY TO THE BATTERY NEGATIVE.
GROUNDING THROUGH FRAME MEMBERS IS NOT RECOMMENDED.
ALL GROUND PATHS MUST BE CAPABLE OF CARRYING ANY LIKELY FAULT CURRENTS.
DO NOT REVERSE THE BATTERY POLARITY. ATTEMPTING TO CRANK THE ENGINE WHEN
THE POLARITY OF THE BATTERY CONNECTIONS IS REVERSED MAY DAMAGE THE PANEL.
Note:
A maximum of three ring terminals should be connected to a ground stud to ensure integrity of the
ground connection. The use of more than three terminals can cause the connection to become loose
.
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