Himoinsa CEM7 User Manual

CEA7 CONTROL UNIT INPUTS AND OUTPUTS | PAGE 24
If zero is entered as the number of teeth for the ywheel ring gear parameter, the
control unit is congured to not have a pickup sensor and calculate the engine
speed from the frequency of the AC signal generated by the genset according to
the ratio 50Hz/1500rmp or 50Hz/3000rpm, 60Hz/1800rmp or 60Hz/3600rpm
(Regulations table, parameter 26).
The CEA7 control unit can be congured to produce both an overspeeding alarm
(Alarms table, parameters 22 to 24) as well as a under speed alarm (Alarms
table, parameters 25 to 27) depending on the mechanical speed provided by the
pickup.
5.5 PROGRAMMED DIGITAL OUTPUTS
The CEA7 control unit has 9 specic purpose outputs (3 relay outputs, 3 power
outputs and 3 digital outputs).
The functioning of these outputs is preset by default values but can be modied
by setting the control unit.
PREHEATING OUTPUT. (PR). POWER OUTPUT
The preheating output (PR) of the CEA7 control unit is an output connected to a
high power shortable controller (70 A) which regulates the heating process of the
engine's spark plugs during the starting process. The activation time of the
preheating output can be set (Times table, parameter 4). The preheating output
can also be used to control stopping via the excitation of engines which use this
type of stop or for activation of the GAS supply ramp (Regulations table,
parameter 18).
The programming of the PR output can be assigned to any of the functions of the
programmable outputs (Settings table, parameter 43). In this case, the default
function of the output is disabled.
ENGINE STARTING OUTPUT. (ARR). POWER OUTPUT
The engine starting output (ARR) of the CEA7 control unit is an output connected
to a high power shortable driver (40 A) which activates the starter. The engine
starting output remains active until a programmed startup condition is detected
(Regulations table, parameters 19 to 22) for a programmable maximum time
(Times table, parameter 5).
ALTERNATOR VOLTAGE INPUT (DI)
The alternator voltage analogue input allows the voltage generated by the battery
charging alternator to be monitored. This input is used to diagnose possible
malfunctioning of the alternator if it detects low voltage while the engine is
running; under these conditions, a battery alternator alarm (Alarms table,
parameters 10 to 12) is generated.
Also, this voltage can be programmed for detecting genset start up conditions
(Regulations table, parameter 20) via an alternator voltage threshold for the
engine when running (Thresholds table, parameter 21), provided it is not set in
dynamo mode (Regulations table, parameter 3).
AUXILIARY ANALOGUE INPUT (TC)
The auxiliary analogue input is assigned by default to the supervision of the oil
temperature and can be programmed to be allocated to any other measurement
through a programmable curve (Analogue Sensors table).
The analog input TC can be congured to operate as a digital input (Regulations
table, parameter 37, value 1 or 2).
ANALOGUE INPUTS EXPANSION
The CEA7 control unit allows you to add 8 analogue temperature inputs to the
PT100 sensor through the expansion of up to 2 CCPT100 devices. 2 maximum
temperature alarms can be added to each of these 4 analogue temperature
inputs with a P100 sensor.
The CEA7 control unit allows you to add 4 congurable analogue inputs (voltage
0 to 10 V, current 4 to 20 mA or resistive) through the expansion of the CCPT100
device. A congurable response curve, a descriptive text and the units displayed
in the user interface of the control unit can be associated to each of these 4
congurable analogue inputs.
5.4 PICKUP INPUT (PKC1, PKC2)
The measurements module pickup input measures the engine speed in
revolutions per minute (rpm). To calculate the speed it is necessary to enter the
number of teeth on the ywheel ring gear (Thresholds table, parameter 24).

Himoinsa CEM7 Specifications

General

Brand	Himoinsa
Model	CEM7
Category	Control Unit
Language	English