SYSTEM WIRING OVERVIEW
CUSTOMER INTERFACE HARNESS
NOTE: The Customer Interface Harness must be properly grounded to maintain CE compliance.
Customer electrical connections to the ECU are made through a shipped loose harness called the Customer Interface Harness [standard harness length = 25 ft.
(8 m); optional harness length = 50 ft. (15 m)]. The terminated end of the harness connects to a bulkhead connector behind the Power Distribution Box on the Power Distribution Box bracket. The unterminated end of the harness connects to customer connections.
Table 2.10-1 (pages 2.10-2, 2.10-3, and 2.10-4) provides information on each of the unterminated wires in the Customer Interface Harness.
Some connections of the Customer Interface Harness are required for ESM system operation. See “Required Connection Descriptions – Customer Interface Har-ness” on page 2.10-5 for more information. See
“Optional Connections” on page 2.10-6 for more infor-mation on optional connections.
Setting up user-adjustable parameters is through PC-based ESP and is done via a serial cable (RS-232) supplied by Waukesha Engine. This serial cable has a standard 9-pin RS-232 connection that plugs into the PC and an 8-pin plastic Deutsch® connector that plugs into the ECU.
WARNING
Explosion Hazard – Do not disconnect equipment unless power has been switched off or the area is known to be non-hazardous. Improper mainte-nance or misuse could result in severe personal injury or death.
WARNING
Do not install, set up, maintain, or operate any electrical components unless you are a technically qualified individual who is familiar with the electri-cal elements involved. Electrielectri-cal shock can cause severe personal injury or death.
CAUTION
CAUTION
Table 2.10-1 Customer Interface Harness Loose Wire Identification (Part 1 of 3) WIRE
LABEL DESCRIPTION SIGNAL NAME SIGNAL
TYPE
A digital output from the ECU that indicates that the ECU is in either alarm or shutdown mode.
Engine Alarm Digital HSD O/P WHT 14 18 20 1604
KNK ALM
A digital output from the ECU that indicates the engine is knocking and will shut down immediately unless some action is taken to bring the engine out of knock.
Engine Knocking Digital HSD O/P WHT 47 18 20 1617
ENG ESD
A digital output from the ECU that indicates that the ECU is in shutdown mode. Output is NOT latched.
Emergency
Shutdown Digital HSD O/P WHT 42 18 20 1607
ESD
A digital input to the ECU from the local control that must be high for the engine to run. If ESD goes low, the engine performs an emergency shutdown.
Emergency Engine
Shutdown Digital I/P YEL 15 18 20 1606
RUN/STOP
A digital input to the ECU from the local control that must be high for the engine to run. If RUN/STOP goes low, the engine performs a normal shutdown.
High = OK to Run Low = Normal Shutdown
Digital I/P YEL 25 18 20 1611
GOV 40
Used for remote speed voltage input setting. Fit “jumper”
between GOV 40 and GOV 41 to
Used for remote speed voltage input setting. Fit “jumper”
between GOV 40 and GOV 41 to I/P-Fit “jumper” between
40 and 41 for 4 – 20 mA operation
TAN 41 18 20 1619
GOVREMSP+
Input to the ECU that is used for remote speed setting using 4 – 20 mA signal.
Remote Speed Setting 4 20 mA Signal +
4 – 20 mA I/P+
Open circuit for 0.875–4.0 V
operation
LT GRN 39 18 20 1614
GOVREMSP-Input to the ECU that is used for remote speed setting using 4 – 20 mA signal.
Remote Speed Setting 4 20 mA Signal
-4 – 20 mA I/P-Open circuit for
0.875–4.0 V operation
LT BLU 27 18 20 1613
GOVAUXSIG
Used for compatible load sharing input. Used for power generation applications only.
Aux. Input Signal ±2.5 V I/P RED 28 18 20 1615
GOVAUXGND
Used for compatible load sharing input. Used for power generation applications only.
Aux. Input Ground Ground BLK 29 18 20 1110
GOVAUXSHD Used as shield for compatible
load sharing input. Harness Shield Shield SLVR 46 18 20 1137
GOVALTSYN
Alternate governor dynamics.
Used for power generation appli-cations only to obtain a smooth idle for fast paralleling to the grid.
Alternate Governor
Dynamics Digital I/P YEL 10 18 20 1620
GOVHL IDL
Digital input to the ECU that changes the operating rpm of the engine. Used for power generation applications only.
When using GOVREMSEL, the input status of GOVHL IDL must be checked. See information on setting this input to a “safe mode” in Table 2.10-2.
Rated Speed/Idle
Speed select Digital I/P YEL 37 18 20 1616
GOVREMSEL
Digital input to the ECU that switches between either remote speed setting input or high/low idle input. Must be used to enable remote speed input. Not typically used for power generation.
Remote Speed
select Digital I/P YEL 22 18 20 1608
LRG LOAD
Digital input to the ECU that
“kicks” the governor to help the engine accept large load addi-tions. Mainly useful for stand-alone power generation applications.
Load Coming Digital I/P YEL 20 18 20 1631
START
Momentary digital input to the ECU that is used to begin the engine start cycle.
Start Engine Digital I/P YEL 24 18 20 1609
LOGIC GND Used as the negative connection point for 4 – 20 mA signals.
Customer Reference Ground
Ground via internal resettable fuse
(See Note 2)
BLK 4 16 16 1111
WKI+
A 4 – 20 mA analog input to the ECU that represents the real time WKI rating of the fuel. Use not necessary for most applica-tions. See Section 2.25 for scal-ing information.
Fuel Quality (WKI)
Signal + 4 – 20 mA I/P+ LT GRN 30 18 20 1623
WKI-A 4 – 20 mWKI-A analog input to the ECU that represents the real-time WKI rating of the fuel.
Use not necessary for most applications. See Section 2.25 for scaling information.
Fuel Quality (WKI)
Signal - 4 – 20 mA I/P- LT BLU 31 18 20 1622
PROG OP 1
A 4 – 20 mA output from the ECU that represents an engine operating parameter. See Table 2.35-8 on page 2.35-11 for scaling and other information.
Average rpm 4 – 20 mA O/P+ ECU that represents an engine operating parameter. See Table 2.35-8 on page 2.35-11 for scaling and other information.
Oil Pressure 4 – 20 mA O/P+ ECU that represents an engine operating parameter. See Table 2.35-8 on page 2.35-11 for scaling and other information.
Coolant ECU that represents an engine operating parameter. See Table 2.35-8 on page 2.35-11 for scaling and other information.
Intake Manifold Section 2.35 for additional infor-mation.
RS485 A- Comms GRY 2 18 20 1305
RS 485B+
RS485 MODBUS®, see Section 2.35 for additional infor-mation.
RS485 B+ Comms GRY 23 18 20 1306
ACT LOAD%
A 4 – 20 mA output from the ECU that represents the actual percentage of rated torque the engine is currently producing.
See Table 2.35-8 on page 2.35-11 for scaling information.
Engine Load + 4 – 20 mA O/P+
(See Note 2)
DK
GRN 32 18 20 1624
Table 2.10-1 Customer Interface Harness Loose Wire Identification (Continued), (Part 2 of 3) WIRE
LABEL DESCRIPTION SIGNAL NAME SIGNAL
TYPE