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CPU-95 DIGITAL IGNITION SYSTEM
9.6
LEFT ENTRY:
Run a separate conduit to the left entry for all connections to the
user interface terminal strips in the Ignition Module. Use 24 AWG,
UL style 1015 wire or shielded cable for these connections; the 24 AWG
wire is available from Altronic under part number 603102 (black) or
603103 (white).
A. SHUTDOWN INPUT (terminal 1):
This input is open for normal operation of the ignition system
and is connected to engine ground for shutdown. Use a normal-
ly-open dry contact that closes to engine ground to inhibit igni-
tion firings for engine shutdown.
B. MISCELLANEOUS INPUT (terminal 2):
The miscellaneous input is a normally open input that when
grounded provides the ability to activate various user selected
features. The default feature is the one-step retard. The other
available features are the multi-strike and max. energy level;
any number of the three features can be used, but must first be
configured through a PC (personal computer) using the termi-
nal program. For programming and operating details, refer to
the CPU-95 Operating Instructions form CPU-95 OI and Terminal
Program user instructions form CPU-95 PI.
C. ALARM OUT (terminal 3), FAULT OUT (terminal 4),
FIRE CONFIRM OUT (terminal 5):
Three output switches are available for monitoring ignition
system status. Each output consists of a solid state normally-
closed switch that is referenced to one common return path,
COMMON OUT (terminal 6) which is isolated from engine or power
ground. A fault condition will cause each normally-closed out-
put switch to turn off. The maximum rating of the switches is
100 Vdc, 75 mA. The recommended hookup is shown on drawing
709 966. For further description, refer to the CPU-95 Operating
Instructions form CPU-95 OI.
D. RS-485 SERIAL PORT:
The RS-485 serial port is used for connection to either the op-
tional Display Module or to a PC. If a permanent connection
is made to the RS-485 serial port, use a two conductor shielded
cable of fine gauge stranded wire and connect the wires to the
terminals marked SERIAL RS485+, SERIAL RS485− and shield.
6
FORM CPU-95 II 4-08
NOTE: This is a 5-volt low
level signal.
NOTE: The shelf state (un-
powered) of these switches
is an open condition.
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