Overview; Ignition Module Output Switches, Led Indicators And Control Input - Altronic CPU-95 Operating Instructions Manual

1.0 OVERVIEW

1.1 The Altronic CPU-95EVS Digital Ignition system with enhanced display has been
designed for application on natural gas fueled engines. This system is field-
programmable and offers a variety of advanced control, emissions reduction,
primary and spark diagnostics, self diagnostics, serial communications and
engine protection features. The system consists of three main parts: an engine
mounted Ignition Module (791963-8/16A), DC to DC power supply (791911-1),
and a user interface Display Module (791909-1).
1.2 This document provides instructions and descriptions to be used in the operation
of the ignition system, and does not cover physical installation. Reference
the installation instructions, form CPU-95EVS II, for instructions regarding
installation and mounting.
2.0 IGNITION MODULE OUTPUT SWITCHES, LED
INDICATORS AND CONTROL INPUT
2.1 Three output switches in the Ignition Module provide a means of communicating
the current ignition status to other systems. These switches have isolated outputs
and share one common return path which is not referenced to engine or power
ground. They will be in the open condition when the unit is unpowered. A typical
application would be as a relay or solenoid coil driver.
FIRE-CONFIRM OUT switch: closed when the ignition is firing or trying to fire.
Could be used as a signal to the control system to turn fuel on.
FAULT OUT switch: closed to signal that the ignition has no diagnostic faults
which would result in a self-shutdown. Upon detecting a fault that would result in
a self-shutdown of the ignition, this switch will open. Could be used as a signal to
the control system to turn fuel off.
ALARM OUT switch: closed to signal that no unacknowledged faults or warnings
are present. Upon detection of a diagnostic fault or warning, this switch will open.
This output is designed to control an alarm indicator or sounding device.
2.2 Four red LED indicators are provided inside the ignition unit for troubleshooting
purposes:
POWER LED: on to indicate that the unit has power and the microprocessor is
running. The Power LED flashes to indicate that the unit has power but is not
operating correctly. The Power LED is off to indicate that the unit has no power.
TX LED: flashes to indicate that the ignition unit is transmitting on the RS-485
serial link.
RX LED: flashes to indicate that the ignition unit is receiving on the RS-485
serial link.
ALARM LED: turns on to indicate that a warning or fault is present. The ALARM
LED flashes when an acknowledged warning is present.
2.3 One RS-485 serial communications port is provided within the Ignition Module.
This port is normally used for communication to the optional Display Module. A PC
(personal computer) or a PLC (programmable logic controller) can be connected to
the RS-485 port to perform remote monitoring or control functions. The Ignition
Module can be operated in a stand-alone mode, but diagnostic and control features
would not be accessible. This port is also used to configure the ignition system for
its application using a PC and the CPU-95EVS PC terminal software.
2.4 One digital input is provided inside the ignition system (MISC. INPUT). This logic
CPU-95EVS OI 7-13
All rights reserved © ALTRONIC, LLC 2013
WARNING: DEVIATION FROM THESE
INSTRUCTIONS MAY LEAD TO
IMPROPER ENGINE OPERATION WHICH
COULD CAUSE PERSONAL INJURY
TO OPERATORS OR OTHER NEARBY
PERSONNEL.
THE IGNITION SYSTEM MUST BE
CONFIGURED PRIOR TO USE ON AN
ENGINE. REFER TO SECTION 4.9 TO
VIEW THE CURRENT CONFIGURATION.
REFERENCE FORM CPU-95EVS PI FOR
INSTRUCTIONS DESCRIBING HOW TO
CONFIGURE THE IGNITION SYSTEM.
VERIFY EEPROM PROGRAMMING
PRIOR TO STARTING ENGINE.
NOTE: These instructions pertain to
CPU-95EVS systems equipped with
logic firmware dated 03/09/13. The
firmware dates can be displayed from
the home screen by pressing "DIAG"
and then "ENTER". The date of the
installed firmware is viewed:
– Top line (LOGIC) applies to the
– Lower line (DISPLAY) applies to
NOTE: If possible, keep the original
shipping container. If future
transportation or storage is necessary,
this container will provide the
optimum protection.
2
output module firmware date.
the display module firmware date.