UENR4655-03 April 2017
Harness And Wire Electrical Schematic Symbols Symbols
T
Pressure Symbol
Temperature Symbol
Level Symbol
Flow Symbol
Circuit Breaker Symbol
Symbols and Definitions Fuse: A component in an electrical circuit that will open the circuit if too much current flows through it.
COOLANT LOSS
Switch (Normally Open): A switch that will close at a specified point (temp, press, etc.). The circle indicates that the component has screw terminals and a wire can be disconnected from it. Switch (Normally Closed): A switch that will open at a specified point (temp, press, etc.). No circle indicates that the wire cannot be disconnected from the component.
EN-CAN TERMINATING RESISTOR
EMCP 4.3
Ground (Wired): This indicates that the component is connected to a grounded wire. The grounded wire is fastened to the machine. Ground (Case): This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the machine.
REMOTE TSTAT
C9, C13, C15 and C18 Generator Set with EMCP 4.3 Electrical System
J1 CONNECTOR
C9 Gen Set: NGP1-UP NTX1-UP
CHARGING ALTERNATOR
Reed Switch: A switch whose contacts are controlled by a magnet. A magnet closes the contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch.
C13 Gen Set: KJE1-UP T321-UP
C15 Gen Set: NAP1-UP T331-UP
Sender: A component that is used with a temperature or pressure gauge. The sender measures the temperature or pressure. Its resistance changes to give an indication to the gauge of the temperature or pressure.
T
Relay (Magnetic Switch): A relay is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close the switch part of the relay.
C18 Gen Set: NAW1-UP T341-UP
Solenoid: A solenoid is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close a valve or move a piece of metal that can do work.
STARTER MOTOR
Magnetic Latch Solenoid: A magnetic latch solenoid is an electrical component that is activated by electricity and held latched by a permanent magnet. It has two coils (latch and unlatch) that make electromagnet when current flows through them. It also has an internal switch that places the latch coil circuit open at the time the coil latches.
Harness and Wire Symbols Wire, Cable, or Harness Assembly Identification: Includes Harness Identification Letters and Harness Connector Serialization Codes (see sample).
ANNUNCIATOR JACKET WATER HEATER
Harness Identification Letter(s): (A, B, C, ..., AA, AB, AC, ...)
L-C12 3E-5179
AG-C4 111-7898
L-C12 3E-5179
1
Part Number: for Connector Plug
Harness Connector Serialization Code: The "C" stands for "Connector" and the number indicates which connector in the harness (C1, C2, C3, ...).
Part Number: for Connector Receptacle
2 Plug
Receptacle Pin or Socket Number
1 2
Deutsch connector: Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.
1 2
Sure-Seal connector: Typical representation of a Sure-Seal connector. The plug and receptacle contain both pins and sockets.
5A Fuse (5 Amps)
9X-1123
Component Part Number
325-AG135 PK-14
© 2017 Caterpillar All Rights Reserved
Harness identification code: This example indicates wire group 325, wire 135 in harness "AG".
Wire Gauge Wire Color
CAT, CATERPILLAR, their respective logos, “Caterpillar Yellow”, and the POWER EDGE trade dress as well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission.
BATTERY CHARGER
FUEL LEVEL
FUEL LEAK
*SOME COMPONENTS NOT SHOWN FOR CLARITY
LEFT SIDE VIEW
PL-CAN TERMINATING RESISTOR
BREAKER
CB-ECM ENCLOSURE E-STOP
CB-STR
RF-C1 CB RAIL
CB-ALT
EM-10(NOT SHOWN) AC STD BLOCK EMCP 4.3 BLOCK E-STOP SERVICE CONNECTOR
RELAYS 1-16 ETHERNET PORT A ETHERNET PORT B
ALT HEATER(NOT SHOWN) OPTIONS BLOCK CONTROL RELAY CB-JWH CB AUX CONTACTS
JWH RELAY
SHUNT TRIP RELAY
CB-ALH
GEN SD FAULT RELAY GEN RUNNING RELAY
*SOME COMPONENTS NOT SHOWN FOR CLARITY
EMCP PANEL VIEW
*SOME COMPONENTS NOT SHOWN FOR CLARITY
GENERATOR TOP VIEW
30 Page,
UENR4655-03
SMMS RELAY
(Dimensions: 39 inches x 28 inches)
PL-RS485 TERMINATING RESISTOR