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New kohler detroit dec 550 digital controller comlete
Kohler Decision-Maker 550 Controller
General Description and Function
The Decision-Maker 550 generator set controller provides
advanced control, system monitoring, and system diagnostics
for optimum performance and compatibility with selected
engine Electronic Control Modules (ECM).
ECM models only: The Decision-Maker 550 controller
directly communicates with the ECM to monitor engine
parameters and diagnose engine problems (see Controller
The standard Decision-Maker 550 interfaces the generator
set to other power system equipment and other network
management systems using standard industry network
communications. The 550 controller uses unique software
logic to manage sophisticated functions, such as voltage
regulation, normally requiring additional hardware.
The Decision-Maker 550 interface is available with a
keyswitch option to allow easy master switch function to meet
appropriate local code requirements. The key is removable in
A digital display and keypad provide access to data. The
display provides complete and understandable information,
and the keypad allows easy local access.
The controller can communicate directly with a personal
computer via a network or via a modem configuration. See
G6-50 spec sheet for more information.
The controller supports Modbus protocol. Use with serial
Monitor III, an optional menu-driven Windows-based PC
software, monitors engine and alternator parameters and
also provides control capability. See G6-76 spec sheet for
Menu 15 (Protective Relays) is required for optional
protective functions and is only available with the Kohler
Modbus is a registered trademark of Schneider Electric.
Windows is a registered trademark of Microsoft Corporation.
Industrial Generator Set Accessories
Decision-Maker 550 with Keyswitch Option
Decision-Maker 550 Software Version 2.10 or higher
Power source with circuit protection: 12- or 24-volt DC
Power drain: 700 milliamps (or 400 milliamps without panel lamps)
Humidity range: 5% to 95% noncondensing
Operating temperature range: -40 C to +70 C (-40 F to +158 F)
Storage temperature range: -40 C to +85 C (-40 F to +185 F)
Environmentally sealed 16-button membrane keypad
Three-position (run, off/reset, auto) selector switch or keyswitch Latch-type emergency stop switch with International
Electromechanical Commission (IEC) yellow ring identification
Fuse-protected battery circuits
Controller mounts locally or remotely up to a distance of 12 m (40 ft.)
and viewed from one of four positions
460 x 275 x 291 mm (18.15 x 10.8 x 11.47 in.)
In order to meet NFPA 110, Level 1 requirements, the generator
set controller must monitor specific engine/generator functions
Low coolant temperature warning
High coolant temperature warning
High coolant temperature shutdown
Low fuel (level or pressure) *
EPS supplying load High battery voltage *
Contacts for local and remote common alarm
* Requires optional input sensors on some generator set models.
The control functions apply to both the ECM and non-ECM equipped
models unless noted otherwise.
The voltage adjustment provides keypad adjustment in 0.1 volt
increments of the average line-to-line AC output voltage with a
maximum adjustment of 10% of the system voltage.
The controller firmware provides generator set overload and short
circuit protection matched to each alternator for the particular
The controller automatic restart feature initiates the start routine
and recrank when the generator set slows to less than 390 rpm
Battleswitch (Fault Shutdown Override Switch)
The battleswitch input provides the ability to override the fault
shutdowns except emergency stop and overspeed shutdown in
emergency situations and during generator set troubleshooting.
Real-time clock and calendar functions time stamp shutdowns for
local display and remote monitor. Also use these functions to
determine the generator set start date and days of operation.
This feature provides the ability to bypass (override) the cooldown
temperature shutdown and force the generator set to run for the full
engine cooldown time delay. Also see Time Delay Engine Cooldown
selects the number of crank cycles (1-6) and the crank time from 10
to 30 seconds. The crank disconnect depends upon the speed
sensor input information or the generator frequency information.
The default cyclic crank setting is 15 seconds on, 15 seconds off
The digital voltage regulator provides 0.25% no-load to full-load
To conserve battery power, the display turns off after 5 minutes of
inactivity. Pressing any keypad button activates the display.
The controller monitors ECM communication links and provides fault
detection for oil pressure signal loss, coolant temperature signal
loss, and ECM communication loss. Each of these faults provides
local display, alarm horn ON, and relay driver output (RDO) on ECM
models only. See Controller Diagnostics following for additional
Idle speed function provides the ability to start and run the engine
at idle speed for a selectable time period. The engine will go to
normal speed should the temperature reach warm-up before the
Keypad switch verifies functionality of the indicator LEDs, alarm
The load shed function provides a load control output (RDO) with
user-selectable load shed level.
