Claas Atos 350-330 (A79) Tractors Technical System ES

File List:

00 1157 713 X.pdf

00 1157 713 X.pdf:

Technical systems
CCN Explanation
CCN (CLAAS Component Number)
General indications
Electrical regulations
Hydraulic regulations
CCN (CLAAS Component Number)
Introduction
Manual validity
Validity of this diagnostic manual
01 Engine
0125 Fuel/injection system
fuel supply circuit
Measurement value table
Function Description
Hydraulic diagram of the fuel supply circuit
fuel injection circuit
Measurement value table
Function Description
Hydraulic diagram of the fuel injection circuit
Power reading sheets
Work preparation:
Unit Conversions
Calculation formula
Example of curve measured on an ATOS 340
0130 Lubricating oil system
Engine lubrication circuit
Measurement value table
Function Description
Engine lubrication pressure control
0135 Cooling system
Engine cooling circuit
Measurement value table
Function Description
Hydraulic diagram of the cooling circuit
Engine thermostat control
0140 Exhaust gas system
Engine exhaust circuit
Measurement value table
Function Description
Exhaust gas and recycled exhaust gas circuit diagram
0145 Air suction
Engine air intake circuit
Measurement value table
Function Description
Intake air circuit diagram
0150 Engine coupled parts
Engine start
Tractor with mechanical inverter and mechanical lift
Tractor with mechanical inverter and electronic lift
Tractor with hydraulic inverter and mechanical lift
Tractor with hydraulic inverter and electronic lift
Measurement value table
Function Description
0155 Engine adjustment
Engine speed setpoint
Measurement value table
Function Description
0165 Exhaust gas aftertreatment
Engine aftertreatment system
Measurement value table
Function Description
02 Gears / clutch / cardan shaft
0202 Complete component
Transmission presentation
0222 Hydraulic inversion
REVERTSHIFT Hydraulic Inverter
Tractor with electronic lift
Tractor with mechanical lift
Measurement value table
Function Description
Calibration of REVERSHIFT clutches and clutch pedal
Checking the REVERSHIFT control pressure
Accumulator control «5015»
«9048» inverter lubrication pressure control
0234 Load Switching Gear
TWINSHIFT
Tractor with electronic lift
Tractor with mechanical lift
Measurement value table
Function Description
Checking the TWINSHIFT control pressure
TRISHIFT
Measurement value table
Function Description
Checking the TRISHIFT Control Pressure
0242 Differential
Locking differentials
Tractor with electronic lift
Tractor witchanical lift
Measurement value table
Function Description
Oping law
Hydraulic control circuit
Checking Differential Lock Control Pressure
0252 Electrohydraulic drive of the front axle
Traction on the four wheels
Tractor with electronic lift
Tractor with mechanical lift
Measurement value table
Function Description
Operating law
Hydraulic control circuit
Checking the four-wheel drive control pressure
04 Brake
0405 Service brake
Tractor service brake only with rear brakes
Measurement value table
Tractor service brake with front and rear brakes
Measurement value table
Tractor service brake with front and rear brakes and hydraulic parking brake
Measurement value table
0415 Parking brake
Hydraulic parking brake
Measurement value table
Function Description
Checking the pressure of the hydraulic parking brake “9023”
Checking the hydraulic parking brake control pressure
Assisted parking brake accumulator check «5019»
0420 Trailer air brake equipme Trailer pneumatic brake
Measurement value table
Function Description
0425 Hydraulic Trailer Brake
Hydraulic Trailer Brake
05 Address
0505 Address
Main address, standard address
Measurement value table
Function Description
steering box
Pressure control in steering cylinders
Main address, dynamic address
Measurement value table
Function Description
Dynamic steering operating rules
steering box
Pressure control in steering cylinders
06 Lifting device
0605 Rear linkage
ATOS 240-220 mechanical rear linkage
Description of operation
ATOS 350-330 mechanical rear linkage
Description of operation
Electronic rear lift
Measurement value table
Description of operation
Rear linkage calibration
0610 Front linkage
Front lift
Function Description
08 Drives
0802 Rear PTO
Rear power take-off on traors with mechanical lift
Measurement value table
Function Description
Tractor rear PTO with mechanical lift, external controls and/or front PTO
Measurement value table
Function Description
Rear power take-off on tractors with electronic lift
Measurement value table
Function Description
Rear power take-off regimes
Regime selection
Rear PTO clutch
Checking the rear power take-off activation pressure
0804 Front power take-off
Front power take-off on tractors with mechanical lift
Measurement value table
Function Description
Front power take-off on tractors with electronic lift
Measurement value table
Function Description
09 Hydraulics
0910 Bombs
Hydraulic steering pump «2018»
Control of the steering hydraulic pump «2018»
Auxiliary hydraulic pump «2027.1»
Checking the auxiliary hydraulic pump «2027.1»
Auxiliary hydraulic pump «2027.2»
Checking the auxiliary hydraulic pump «20nverter crankcase drain pump «2106»
Checking the inverter crankcase drain pump «ydraulic pipes
ATOS 240-220 lubrication circuit
ATOS 350-330 lubrication circuit
Lubrication points
0920 Valves
Pressure limiter block
Checking the low pressure control pressure «9010»
Solenoid valve block
REVERSHIFT control block
TRISHIFT control block
Hydraulic Parking Brake Check Valve Block
Circuit control block 60 liters eco
Measurement value table
Function Description
Auxiliary hydraulic distributors
Auxiliary hydraulic distributor, two ways and three positions
Auxiliary hydraulic distributor, four ways and three positions
Auxiliary hydraulic distributor, four ways and four positions
Auxiliary hydraulic distributor, six ways and four positions
Auxiliary hydraulic distributor, six ways and four positions
Auxiliary hydraulic distributor, six ways, three and four positions
Distributor flow control
rol of pressure limiter «7006»
Electrical distributor block
Measurement value table
Elohydraulic distributor flow control
0935 Hydraulic system control/supervision
Hydraulic system monitoring
Tractor with mechanical lift
Tractor with electronic lift
Measurement value table
0980 Hydraulic connection diagram
Hydraulic circuit on two-wheel drive ATOS 350-340-330 with mechanical shuttle
Hydraulic circuit on two-wheel drive ATOS 240-220 with mechanical shuttle
Hydraulic circuit on four-wheel drive ATOS 340-330 with mechanical shuttle, TWINSHIFT and front PTO
Hydraulic circuit on four-wheel drive ATOS 240-220 with mechanical shuttle and TWINSHIFT
Hydraulic circuit in ATOS 350 four-wheel drive with mechanical shuttle, TWINSHIFT, front power take-off and dynamic steering
Hydraulic circuit on ATOS 330 four-wheel drive with REVERSHIFT, TWINSHIFT, front PTO and hydraulic parking brake
Hydraulic circuit on ATOS 340 four-wheel drive with REVERSHIF TWINSHIFT, front PTO and hydraulic parking brake
Hydraulic circuit on two-wheel drive ATOS 340-330 with REVERSHIFT
Hydraulic circuit on two-wheel drive ATOS 240-220 with REVERSHIFT
Hydraulic circuit on two-wheel drive ATOS 350 with REVERSHIFT
Hydraulic circuit on ATOS 350 four-wheel drive with REVERSHIFT and TWINSHIFT
Hydraulic circuit on ATOS 240-220 four-wheel drive with REVERSHIFT, TWINSHIFT and front PTO
Hydraulic circuit on ATOS 350 four-wheel drive with REVERSHIFT, TRISHIFT, front PTO, dynamic steering and hydraulic parking brake
ATOS 350-330 with auxiliary hydraulic circuit on tractors with mechanical lift and a hydraulic distributor
ATOS 240-220 with auxiliary hydraulic circuit on tractors with mechanical lift and a hydraulic distributor
ATOS 350-330 with auxiliary hydraulic circuit on tractors with mechanical lift, two hydraulic distributors and hydraulic trailer brake
ATOS 240-220 with auxiliary hydraulic circuit on tractors with mechanical lift, two hydraulic distributors and hydraulic trailer brake
ATOS 350-330 with auxiliary hydraulic circuit on tractors with electronic linkage, three hydraulic distributors, electrohydraulic distributor, “Cradle” trailer brake and front linkage
ATOS 240-220 with auxiliary hydraulic circuit on tractors with electronic linkage, three hydraulic distributors, electrohydraulic distributor, “Cradle” trailer brake and front linkage
ATOS 350-330 with auxiliary hydraulic circuit 60 liters eco on tractors with electronic lift, three hydraulic distributors, electrohydraulic distributor, “Cradle” trailer brake and front linkage
ATOS 240-220 with auxiliary hydraulic circuit 60 liters eco on tractors with electronic lift, three hydraulic distributors, electro-hydraulic distributor, “Cradle” trailer brake and front linkage
10 Install. electrical/electronic
1010 Central electrical system
Location of relays and fuses
Relays and fuses on the front
Fuse assignment
Relay assignment
Dashboaelay assignment (tractor with electronic lift)
Relay assignment (tractor with mechanical lift)
Cab Relay assignment
Relay and fuse board
Assignment of tractor fuses with mechanical lift
Tractor relay assignment with mechanical lift
Fuse assignment on tractors with electronic lift
Relay assignment on tractors with electronic lift
Power fuse and starter relay
Fuse assignment
Relay assignment
1012 Modules / sensors
Module overview
Tractor equipped with mechanical lift (A)
Tractor equipped with electronic lift (B)
Location of the modules
A015 Engine management module
A057 Transmission control module
A060 Hydraulic system control module
A062 External functions module
A101 Control panel module. Tractor with REVERSHIFT and mechanical lift
A101 Control panel module. Tractor with mechanical inverter and mechanical lift
A101 Control panel module. Tractor with REVERSHIFT and electronic lift
A147 Rear linkage control panel
A174 Multifunction Control Module — Mechanical Inverter Tractor
A174 Multifunction Contr Module – Tractor with REVERSHIFT
A206 Rear PTO Management Module
1015 Cable sets
WL001 Front wiper wiring with fixed windshield
WL002 External functions module wiring
WL003 Cab roof wiring
WL004 Cab roof work lights wiring
WL005 Rotating flashing light wiring
WL006 Wiring the work lights on the handrail
WL007 Front PTO solenoid valve wiring
WL008 Air Brake Pressure Switch Wiring
WL009 CUNA brake solenoid valve wiring
WL010 Auxiliary electrohydraulic distributor wiring
WL011 Front wiper wiring with swing windshield
WL012 Injector wiring – Atos 350-330
WL012 Injector wiring – Atos 240-220
WL014 Wiring of additional relays
WL015 Front wiring
WL016 Alternator wiring
WL017 Positive battery wiring (tractors without front linkage)
WL018 Positive battery wiring (trith front linkage)
WL019 Preheating wiring
WL020 Cab wiring (tractors with mechanical shuttle and electronic rear e)
WL021 Cab wiring (tractors with mechanical shuttle and mechanical rear linkage)
WL022 Transmission wiring (tractors with mechanical shuttle and electronic rear linkage)
WL023 Transmission wiring (tractors with mechanical shuttle and mechanical rear linkage)
WL024 Console wiring (tractors with electronic rear linkage)
WL025 Wiring of the 60 liter eco circuit (connection of the hydraulic system control module “HYD A060”)
WL026 Front signal light wiring
WL027 Rear signal light wiring
WL028 Wiring of the headlights and the acoustic warning
WL029 – WL030 Battery wiring
WL031 Rear PTO control wiring (tractors with mechanical rear linkage)
WL032 Rear PTO control wiring 540/540 eco
WL033 Cab wiring (tractors with REVERSHIFT and electronic rear linkage)
WL034 Cab wiring (tractors with REVERSHIFT and mecl rear linkage)
WL035 Transmission wiring (tractors with REVERSHIFT and electronic rear linkage)
WL036 Steering angle seiring
WL037 Wiring of the inverter solenoid valves
WL038 Transmission wiring (tractors with hydraulic shuttle and mechanical lift)
WL039 Motor wiring
WL040 Dynamic steering wiring
WL041 Rear PTO Management Module Wiring
1080 Electrical connection diagram
SCM01 Work lighting
SCM01-01 Work lighting. ATOS 350-330 with mechanical shuttle or with hydraulic shuttle and electronic lift
Component List
SCM01-01 Work lighting. ATOS 350-330 with hydraulic shuttle and mechanical lift
Component List
SCM01-01 Work lighting. ATOS 240-220 with hydraulic shuttle and electronic lift
Component List
SCM01-01 Work lighting. ATOS 240-220 with mechanical shuttle
Component List
SCM01-01 Work lighting. ATOS 240-220 with hydraulic shuttle and mechanical lift
Component List
SCM02 Road signs
SCM02-01 Signal lights. ATOS 350-330 with mechanical inverter
Component List
SCM02-01 Signal lights. ATOS 350-330 with hydraulic shuttle and mechanical lift
Component List
SCM02-01 Signal lights. ATOS 350-330 with hydraulic shuttle and electronic lift
Component List
SCM02-01 Signal lights. ATOS 240-220 with mechanical shuttle
Component List
SCM02-01 Signal lights. ATOS 240-220 with hydraulic shuttle and mechanical lift
Component List
SCM02-01 Signal lights. ATOS 240-220 with hydraulic shuttle and electronic lift
Component List
SCM03 Ventilation and air conditioning
SCM03-01 Air conditioning. ATOS 350-330
Component List
SCM03-01 Air conditioning. ATOS 240-220 with hydraulic or mechanical shuttle
Component List
SCM04 Elevator. power take off
SCM04-01 Elevator management. ATOS 350-340-330
Component List
SCM04-01 Elevator management. ATOS 240-220
Component List
SCM04-02 Elevator sensors and solenoid valves. ATOS 350
Component List
SCM04-02 Elevator sensors and solenoid valves. ATOS 340-330
Component List
SCM04-02 Elevator sensors and solenoid valves. ATOS 240-220
Component List
SCM04-03 Rear power take-off with external controls. ATOS 350-330 with hydraulic shuttle and mechanical lift
Component List
SCM04-03 Rear power take-off without external controls. ATOS 350-330 with hydraulic shuttle and mechanical lift
Component List
SCM04-03 Rear power take-off with external controls. ATOS 350-330 with mechanical shuttle and mechanical lift
Component List
SCM04-03 Rear power take-off without external controls. ATOS 350-330 with mechanical shuttle and mechanical lift
Component List
SCM04-03 Rear power take-off with external controls. ATOS 240-220 with hydraulic shuttle and mechanical lift
Component List
SCM04-03 Rear power take-off without external controls. ATOS 240-220 with mechanical shuttle and mechanical lift
Component List
SCM04-03 Rear power take-off with external controls. ATOS 240-220 with mechanical shuttle and mechanical lift
Component List
SCM04-03 Rear power take-off without external controls. ATOS 240-220 with hydraulic shuttle and mechanical lift
Component List
SCM04-03 Front and rear power take-offs. ATOS 350-330 with hydraulic shuttle and mechanical lift
Component List
SCM04-03 Front and rear power take-offs. ATOS 350-330 with hydraulic shuttle and electronic lift
Component List
SCM04-03 Front and rear power take-offs. ATOS 350-330 with mechanical shuttle and electronic lift
Component List
SCM04-03 Front and rear power take-offs. ATOS 240-220 with hydraulic shuttle and electronic lift
Component List
SCM04-03 Front and rear power take-offs. ATOS 240-220 with hydraulic shuttle and mechanical lift
Component List
SCM04-03 Front and rear power take-offs. ATOS 240-220 with mechanical shuttle and electronic lift
Component List
SCM04-03 Front and rear power take-offs. ATOS 350-330 with mechanical shuttle and mechanical lift
Component List
SCM04-03 Front and rear power take-offs. ATOS 240-220 with mechanical shuttle and mechanical lift
Component List
SCM05 Starting and charging circuit
SCM05-01 Startup. ATOS 350-330 with hydraulic shuttle and electronic lift
Component List
SCM05-01 Startup. ATOS 240-220 with hydraulic shuttle and electronic lift
Component List
SCM05-01 Startup. ATOS 350-330 with hydraulic shuttle and mechanical lift
Component List
SCM05-01 Startup. ATOS 240-220 with hydraulic shuttle and mechanical lift
Component List
SCM05-01 Startup. ATOS 350-330 with mechanical shuttle and electronic lift
Component List
SCM05-01 Startup. ATOS 240-220 with mechanical shuttle and electronic lift
Component List
SCM05-01 Startup. ATOS 350-330 with mechanical shuttle and mechanical lift
Component List
SCM05-01 Startup. ATOS 240-220 with mechanical shuttle and mechanical lift
Component List
SCM06 Transmission
SCM06-01 Transmission. ATOS 350 with TRISHIFT hydraulic shuttle and electronic lift
Component List
SCM06-01 Transmission. ATOS 350-340-330 with TWINSHIFT hydraulic shuttle and electronic lift
Component List
SCM06-01 Transmission. ATOS 240-220 with hydraulic shuttle and electronic lift
Component List
SCM06-01 Transmission. ATOS 350-340-330 with hydraulic shuttle and mechanical lift
Component List
SCM06-01 Transmission. ATOS 240-220 with hydraulic shuttle and mechanical lift
Component List
SCM06-01 Transmission. ATOS 350-330 with mechanical shuttle and electronic lift
Component List
SCM06-01 Transmission. ATOS 240-220 with mechanical shuttle and electronic lift
Component List
SCM06-01 Transmission. ATOS 350-330 with mechanical shuttle and mechanical lift
Component List
SCM06-01 Transmission. ATOS 240-220 with mechanical shuttle and mechanical lift
Component List
SCM07 Accessories
SCM07-01 Car radio. ATOS 350-330 with hydraulic or mechanical shuttle
Component List
SCM07-01 Car radio. ATOS 240-220 with hydraulic or mechanical shuttle
Component List
SCM07-02 Accessories. ATOS 350-330 with hydraulic shuttle and electronic lift
Component List
SCM07-02 Accessories. ATOS 240-220 with hydraulic shuttle and electronic lift
Component List
SCM07-02 Accessories. ATOS 350-330 with hydraulic shuttle and mechanical lift
Component List
SCM07-02 Accessories. ATOS 240-220 with hydraulic shuttle and mechanical lift
Component List
SCM07-02 Accessories. ATOS 350-330 with mechanical inverter
Component List
SCM07-02 Accessories. ATOS 240-220 with mechanical shuttle
Component List
SCM08 Windshield Wiper/Washer
SCM08-01 Windshield Wiper/Washer. ATOS 350-330 with hydraulic shuttle
Component List
SCM08-01 Windshield Wiper/Washer. ATOS 240-220 with hydraulic shuttle
Component List
SCM08-01 Windshield Wiper/Washer. ATOS 350-330 with mechanical inverter
Component List
SCM08-01 Windshield Wiper/Washer. ATOS 240-220 with mechanical shuttle
Component List
SCM10 Networks
SCM10-01 Powertrain CAN bus (CAN 1). ATOS 350-330 with hydraulic or mechanical shuttle and electronic lift
Component List
SCM10-01 Powertrain CAN bus (CAN 1). ATOS 240-220 with hydraulic or mechanical shuttle and electronic lift
Component List
SCM10-01 Powertrain CAN bus (CAN 1). ATOS 350-330 with hydraulic shuttle and mechanical lift
Component List
SCM10-01 Powertrain CAN bus (CAN 1). ATOS 240-220 with hydraulic shuttle and mechanical lift
Component List
SCM10-02 Engine CAN bus (CAN 8). ATOS 350-330 with hydraulic or mechanical shuttle
Component List
SCM10-02 Engine CAN bus (CAN 8). ATOS 240-220 with hydraulic or mechanical shuttle
Component List
SCM10-01 Powertrain CAN bus (CAN 1). ATOS 350-330 with mechanical shuttle and mechanical lift
Component List
SCM10-01 Powertrain CAN bus (CAN 1). ATOS 240-220 with mechanical shuttle and mechanical lift
Component List
SCM13 Braking system
SCM13-01 Brake. ATOS 350-330 with mechanical shuttle and electronic lift
Component List
SCM13-01 Brake. ATOS 240-220 with mechanical shuttle and electronic lift
Component List
SCM13-01 Brake. ATOS 350-330 with hydraulic shuttle and electronic lift
Component List
SCM13-01 Brake. ATOS 240-220 with hydraulic shuttle and electronic lift
Component List
SCM13-01 Brake. ATOS 350-330 with hydraulic shuttle and mechanical lift
Component List
SCM13-01 Brake. ATOS 240-220 with hydraulic shuttle and mechanical lift
Component List
SCM13-01 Brake. ATOS 350-330 with mechanical shuttle and mechanical lift
Component List
SCM13-01 Brake. ATOS 240-220 with mechanical shuttle and mechanical lift
Component List
SCM13-02 Trailer brake. ATOS 350-330 with hydraulic or mechanical shuttle and electronic lift
Component List
SCM13-02 Trailer brake. ATOS 240-220 with hydraulic or mechanical shuttle and electronic lift
Component List
SCM13-02 Trailer brake. ATOS 350-330 with hydraulic or mechanical shuttle and mechanical lift
Component List
SCM13-02 Trailer brake. ATOS 240-220 with hydraulic or mechanical shuttle and mechanical lift
Component List
SCM18 Engine
SCM18-01 Engine management. ATOS 350-330 with hydraulic shuttle and electronic lift
Component List
SCM18-01 Engine management. ATOS 350-330 with hydraulic shuttle and mechanical lift
Component List
SCM18-01 Engine management. ATOS 240-220 with hydraulic shuttle and mechanical lift
Component List
SCM18-01 Engine management. ATOS 240-220 with hydraulic or mechanical shuttle and electronic lift
Component List
SCM18-01 Engine management. ATOS 350-330 with mechanical shuttle and electronic lift
Component List
SCM18-01 Engine management. ATOS 350-330 with mechanical shuttle and mechanical lift
Component List
SCM18-01 Engine management. ATOS 240-220 with mechanical shuttle and mechanical lift
Component List
SCM18-02 Engine sensors. ATOS 350-330
Component List
SCM18-02 Engine sensors. ATOS 240-220 with hydraulic or mechanical shuttle and electronic or mechanical lift
Component List
SCM18-03 Injectors and “EGR” valve. ATOS 350-330 with mechanical shuttle and mechanical lift
Component List
SCM18-03 Injectors and “EGR” valve. ATOS 240-220 with hydraulic or mechanical shuttle and electronic or mechanical lift
Component List
SCM18-04 Preheating and chargint. ATOS 350-330 with mechanical or hydraulic shuttle
Component List
SCM18-04 Preheating. ATOS 240-220 with hydraulic or mechhuttle
Component List
SCM19 Dashboard
SCM19-01 Control panel. ATOS 350-330 with hydraulic or mechanical shuttle and electronic lift
Component List
SCM19-01 Control panel. ATOS 240-220 with hydraulic or mechanical shuttle and electronic lift
Component List
SCM19-01 Control panel. ATOS 350-330 with hydraulic or mechanical shuttle and mechanical lift
Component List
SCM19-01 Control panel. ATOS 240-220 with mechanical shuttle and mechanical lift
Component List
SCM20 Hydraulic system
SCM20-01 60 liter eco circuit. ATOS 350-330 with hydraulic shuttle and electronic lift
Component List
SCM20-01 60 liter eco circuit. ATOS 240-220 with hydraulic or mechanical shuttle and electronic lift
Component List
SCM20-01 60 liter eco circuit. ATOS 350-330 with hydraulic shuttle and mechanical lift
Component List
SCM20-01 60 liter eco circuit. ATOS 240-220 with hydraulic shuttle and mechanical lift
Component List
1085 Networks
Tractor CAN bus network architecture with mechanical inverter and mechanical lift.
CAN bus network
CAN bus resistors
Location of CAN bus resistors
Tractor CAN bus network architecture with REVERSHIFT and mechanical lift
CAN bus network
CAN bus resistors
Location of CAN bus resistors
Tractor CAN bus network architecture with REVERSHIFT, mechanical lift and 60 liter eco circuit
CAN bus network
CAN bus resistors
Location of CAN bus resistors
Tractor CAN bus network architecture with electronic lift.
CAN bus network
CAN bus resistors
Location of CAN bus resistors
12 Driver’s cab/platform
1240 Air conditioning equipment
Manual air conditioning
Measurement value table
Air conditioning circuit
Function Description
Preliminary checks
Controls and diagnosis
Failures and solutions
Reading sheets
92 Diagnosis
Presentation of error codes
Introduction
Viewing error codes
Error code
Meaning of the letter that indicates the function or organ causing the error code
9210 Machine Error Codes
Rear PTO Error Codes
Rear PTO Error Codes
Instrument panel error codes
Instrument panel error codes.
List of error codes (any ECU)
Location of components
Electrical installation
To Terminal. Modules
B Sensors
C Electrical and electronic devices
and lighting
G Voltage source
H Signaling device. Light indicator
M Motor (electric)
R Potentiometers. Resistors
S Switches. Switches (control in cabin)
U Switches. External controls
V Electronic components
X Connections
and electromagnetic coil
Z Actual value switches