HGM7220N/HGM7220S GENSET CONTROLLER USER MANUAL
HGM7220N/HGM7220S Genset Controller 2019-02-28 Version 1.0 Page 49 of 60
14.3 OVERALL DIMENSION
Figure 10 - Overall Dimensions
HGM7220N7220S series controller can suit for wide range of battery voltage DC (8~35) V. Negative
of battery must be connected with the engine shell. Diameter of wire that connects power supply with
battery must be over 2.5mm
2
. If floating charger is configured, please firstly connect output wires of
charger to battery’s positive and negative directly, then, connect wires from battery’s positive and negative
to controller’s positive and negative input ports in order to prevent charger disturbing the controller’s
normal working.
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SPEED SENSOR INPUT: Speed sensor is the magnetic equipment installed in starter and for
detecting flywheel teeth. Its connection wires with the controller should apply 2-core shielding line. The
shielding layer should connect to No. 18 terminal in controller while another side is hanging in air. The
else two signal wires are connected to No.17 and No.18 terminals in controller. The output voltage of
speed sensor should be within (1~24) VAC (effective value) during the full speed. 12VAC is
recommended (in rated speed). When the speed sensor is installed, let the sensor spun to contacting
flywheel first, then, make it back 1/3 lap, and lock the nuts of sensor at last.
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OUTPUT AND EXPAND RELAYS:
All outputs of controller are relay contact output type. If expansion
relays are needed, please add freewheel diode to both ends of expansion
relay’s coils (when coils of relay
has DC current) or, increase resistance-capacitance return circuit (when coils of relay has AC current), in
order to prevent disturbance to controller or other equipments.
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AC INPUT: Current input of HGM7220N/7220S series controller must be connected to outside current
transformer. And the current transformer’s secondary side current must be 5A. At the same time, the
phases of current transformer and input voltage must be correct. Otherwise, the current collected and
active power maybe not be correct.
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WITHSTAND VOLTAGE TEST: When controller had been installed on display window, if the high
voltage test is needed
, please disconnect controller’s all terminal connections, in order to prevent high
voltage getting into controller and damaging it.
NOTES:
a) ICOM port must be connected to negative pole of battery.
b) When there is load current, open circuit is prohibited on
transformer’s secondary side.
