-3-
3.2 (continued)
Outputs 1 and 2 can be software configured for either normally open (N/O) or normally closed
(N/C) operation and have an LED indicator associated with them. Outputs 3 and 4 are pre-
programmed normally open for use with the optional Auto start feature. If an Output Module
is programmed for normally closed (energized for run), the LED will be ON in the normal run
condition and OFF for a fault condition. For Normally open configured modules the LED will
be OFF for normal run condition and turn ON for a fault condition.
The standard Output Modules’ outputs use the top row of the dual 16-position terminal strip
which is marked OUT 1 through OUT 4. Each of these outputs are fused with a replaceable
6.3 amp slow-blow fuse, Altronic P/N 601653. In addition to accepting industry standard
Output Modules, a custom Altronic Output Module P/N 691124 is available for tripping ignition
powered CD fuel valves and shorting CD ignition shutdown leads upon a fault. When both
functions are required, two of these modules are used as follows: OUT 1 slot must be used
to trip the fuel valve, and OUT 2 slot must be used to short the ignition. If 12-24 Vdc is lost
to the DE-2500 annunciator system, the custom Output Modules will trip the fuel valve and
short the ignition shutdown lead. This mimics the “fail-safe” operation of a normally closed
Output Module and therefore the LED will be ON in the normal run condition and OFF for a
fault condition. In programming the system, these modules are identified by using the
IGN/FUEL selection. Terminals IGN+ and IGN! are used to connect the shutdown lead, and
FV1 and FV2 are used for the CD fuel valve. A capacitor is included in the Power Supply
Module to supply the energy to trip the fuel valve.
3.3 The 12-24 Vdc power for the DE-2500 system is applied to the power supply terminals
marked (+) and (!) 12 - 24 VDC INPUT POWER. A 6.3 amp replaceable slow-blow fuse
protects the system from over currents, and a power LED lights when power is applied to the
system.
3.4 The external connection for the two serial RS-485 communication ports is on the Power
Supply Module terminal strips. Port 2 is for RS-485 serial communication to future Altronic
instruments, and port 3 is for RS-485 serial communication to a PC (personal computer) or
a PLC (programmable logic controller) to perform remote monitoring or control functions if
desired.
3.5 Terminals marked IGN IN and PU IN are used by the DE-2500 system to detect either engine
rotation or ignition system firings. This input monitors changing signals such as those seen
on either the ignition shutdown lead or a magnetic pickup monitoring an engine mounted gear.
THE MAGNETIC PICKUP INPUT MUST BE USED FOR APPLICATIONS ENABLING THE
AUTO START FUNCTION.
- The IGN IN terminal connects to the positive (+) C.D. ignition shutdown lead.
- The PU IN terminal connects to one magnetic pickup input; the other pickup wire connects
to the minus (!) terminal on the Power Supply Module.
NOTE: An installation may use only one of the terminals IGN IN or PU IN.
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