CEA7 CONTROL UNIT INPUTS AND OUTPUTS | PAGE 20
5.1 DIGITAL INPUTS
PREESTABLISHED INPUTS
The CEA7 control unit's measurements module has 5 digital inputs with operation
that is already preset.
The xed purpose inputs have the following behaviour:
HIGH TEMPERATURE (ATA)
Digital signal indicating to the control unit that an alarm has been generated due
to high engine temperature (Table Alarms, parameters 1-3).
LOW OIL PRESSURE (BPA)
Digital signal indicating to the control unit that an alarm has been generated due
to low oil pressure (Table Alarms, parameters 4 to 6).
WATER LEVEL (NA)
Digital signal indicating to the control unit that an alarm has been generated due
to low water level (Table Alarms, parameters 16 to 18).
EMERGENCY STOP (PEM + SETA)
Digital signal indicating to the control unit that an immediate stop of the engine
must be performed without cooling.
FUEL RESERVE (RC)
Digital signal indicating to the control unit that an alarm has been generated due
to the fuel reserve (Table Alarms, parameters 19 to 21).
Detection of an active output is indicated by the following characters:
• OUT 1. A: Alarm active (AL).
• OUT 2. M: Engine started (MA).
• OUT 3. 1: Programmable output 1 (SAL 1).
• OUT 4. +: Battery charging alternator (D+).
• OUT 5. 2: Programmable output 2 (SAL 2).
• OUT 6. 3: Programmable output 3 (SAL 3).
• OUT 7. r: Network contactor (CRC, CRNA, CRNC).
• OUT 8. g: Genset contactor. (CGC, CGNA, CGNC).
• OUT 9. B: Fuel transfer pump/heating resistor (BTNA, BTA).
• OUT 10. 4: Electronic protection.
• OUT 11. R: Preheating/Powered stop (PR).
• OUT 12. P: Unpowered stop/Powered stop (PC).
• OUT 13. C: Enabling control unit.
By pressing the up or down scroll keys it is possible to display the analogue
inputs.
ANALOGUE INPUTS
N C 0 . 0 Ω P A 0 . 0 Ω
T M 0 . 0 Ω A A 0 . 0 Ω
D I 0 . 0 V V B 0 . 0 V
The value of the resistance analogue inputs is shown in ohms and the voltage
analogue inputs in volts. The various inputs displayed are:
• NC: Fuel level.
• PA: Oil pressure.
• TM: Engine temperature.
• AA: Auxiliary analogue.
• DI: Alternator voltage.
• VB: Battery voltage.
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