Himoinsa CEM7 - Page 28

CEM7 CONTROL UNIT INPUTS AND OUTPUTS | PAGE 28
FUEL TRANSFER PUMP/HEATING/ELECTRONIC PROTECTION OUTPUT (BT).
RELAY OUTPUT
The fuel transfer pump/heating output (BT) of the CEM7 control unit is a relay
output that can be congured (Regulations table, parameter 4) to manage the
fuel tank relling function through the fuel transfer pump or control the engine
heating process or electronic protection output for overload or short circuit.
The fuel transfer pump/heating output (BT) congured as electronic protection is
activated when the control unit detects excessive consumption (Thresholds
table, parameters 7 and 8) and activates an overload (Alarms table, parameters
28 to 30) or short circuit alarm (Alarms table, parameters 58 to 60).
The programming of the BT output may be assigned to any of the functions of the
programmable outputs (Settings table, parameter 44). In this case, the default
function of the output is disabled.
EXCITATION OUTPUT OF THE BATTERY CHARGE ALTERNATOR (D+). DIGITAL
OUTPUT
The D+ output of the CEM7 control unit is responsible for exciting the battery
charging alternator during the starting process. This output can be congured
(Regulations table, parameter 3) to provide a start pulse (alternator mode) for a
programmable time interval (Times table, parameter 8) or keep the alternator
continuously energized (dynamo mode).
GENSET CONTACTOR OUTPUT (CG). RELAY OUTPUT
The genset contactor output (CG) of the CEM7 control unit is a relay output that
manages the closing and opening of the contactor. The activation of the genset
contactor can be congured to be continuous or via a pulse (Times table,
parameter 29).
The programming of the CG output may be assigned to any of the functions of
the programmable outputs (Settings table, parameter 45). In this case, the de-
fault function of the output is disabled.
ENGINE STARTING OUTPUT. (ARR). POWER OUTPUT
The engine starting output (ARR) of the CEM7 control unit is an output connected
to a high power shortable driver which activates the starter. The engine starting
output remains active until a programmed motor running condition is detected
(Regulations table, parameters 19 to 22) for a programmable maximum time
(Times table, parameter 5).
ENGINE STOP OUTPUT. (PC). POWER OUTPUT
The engine stop output (ARR) of the CEM7 control unit is an output connected to
a high power shortable driver (70 A) which activates the stopping of the engine.
The congurable engine stop output (PC) can be congured so that it controls
engines with four different stop modes (Regulations table, parameter 18):
• Stop via de-energisation. The engine stop output congured as a
stop via de-energisation is activated 500 minutes after the preheating
output has been deactivated, which occurs when the engine stop
command has been given.
• Stop by excitation. The engine stop output congured as a stop by
excitation is activated for a programmable time interval (Times table,
parameter12) the engine stop command has been given.
• Stop by excitation/de-energisation. The engine stop output congured
as a stop by excitation/de-energisation is activated 500 minutes
after the preheating output has been deactivated, and is deactivated
when the engine stop command has been given. This output is used
to enable the engine sensors, with the preheating output involved in
performing the engine stop via the process of stopping by excitation.
• Control PULL/HOLD. The engine start control set in PULL/HOLD mode
uses the PC engine stop output as a PULL signal which is activated
for a xed time of 1 second during starting. Any of the programmable
outputs (SAL1, SAL2 or SAL3) can be used as a HOLD signal (Settings
table, parameters 1 to 3, value 25) which remains active during the
time the engine is running.