SCANIA_DEC2 Eng Control Instal Instructions

19:01-19 Issue 1

en

program 99

Installation instructions - Industrial engines

Scania DEC2 control system OEM engines

Part No. 1 588 726

©

Scania CV AB, Sweden, 2001-01:1

Program 99

THE INSTALLATION CONTRACTOR IS RESPONSIBLE FOR A FUNCTIONAL INSTALLATION IN ACCORDANCE WITH SCANIA’S SCA NIA’S INSTALLA INSTALLATION TION INSTRUCTIONS. CLASSIFICA CLASSIF ICATION TION APPROVAL APPROVAL MAY MAY DEPEND DEP END ON THE CLASSIFICATION SOCIETY ON EACH

Address inquiries to: SCANIA CV AB Industrial and Marine Engines Service Support S-151 87 Södertälje Phone +46 (0)8 553 810 00 Fax +46 (0)8 553 831 80 1fn

Contents Important . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Scania DEC2 control system system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Sensors and monitors monitors on the DC12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Sensors and monitors on the DI12. DI12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Sensors and monitors on the DI14. DI14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Sensors and monitors on the DI9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 DEC2 control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Electrical connections on all engines. engines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Electrical connections for all-speed all-speed engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Electrical connections for fixed speed speed engines . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

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Program 99

Important  No work may be carried out on the DEC2 control unit or sensor and wiring. Doing so can affect the control unit safety system and cause injury to the operator and damage to the engine or the equipment being powered by it. • Never splice a damaged wire. Renew the complete wiring, otherwise the function and safety of the system may be affected. • Sensors for the DEC2 control system are intended for use in the DEC2 only.

The following points must be considered to avoid damaging the DEC2 control unit: • The control unit must be fitted so that the casing is electrically isolated from its surroundings. • Make sure that cables to battery and alternator are connected correctly before starting the engine. • The power supply to the unit must be turned off completely before disconnecting wires to the control unit. • Disconnect the DEC2 control unit when rapid charging the battery. • Disconnect the battery when carrying out electric welding.

Basic principles for electrical connection of the DEC2 system The following factors often cause problems to electronic systems: • EMI (electromagnetic interference)

- Use separate supply leads from the battery to the DEC2 control system and make sure they are as short as possible. The following may cause problems with high voltage spikes:

• Extreme heat • High voltages • High levels of vibration

Note: Although the DEC2 system is protected against the environmental factors described above, all measures must be taken to avoid them.

• Solenoids, relay windings, electromagnets connected to the same battery supply circuit as the DEC2 unit. • Loose battery or alternator connections. • Faulty voltage regulator in alternator. • Faulty or inferior battery charger. • Short circuits

- All cables to the DEC-2 must be connected either to battery (-) or battery (+). Any cables left “open” in order to obtain a (-) function will act as aerials and can cause interference in the system.

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3

Program 99

Scania DEC2 control system

1. 2. 3. 4. 5. 6. 7.

PC for diagnosis and program revisions Junction box on engine Coolant pump Engine speed Oil pressure Charge air temp Boost pressure

Sensor All sensors and monitors required for the DEC2 control system are located on or are connected to the engine on delivery. Their locations on the engine are illustrated on pages 5, 6, 7 and 8.

Junction box

8. Connectors to battery, warning lamp, switches for lamp test/fault code test, throttle actuation sensor, trim potentiometer, function switches 9. EDC electronic control unit 10. Fuel shut-off valve

On the control unit end of the cable harness is a short cable harness with two extra connectors, one 12-pin and one 8-pin. These connectors are used for connecting the power supply, main indicator lamp, switch for lamp test/fault code test and other switches and throttle actuation sensor or trim potentiometer if fitted. There is also a 2-pin connector that can be used for a suppressor when necessary.

The junction box is located on the engine on delivery. The location of the junction box on the engine is illustrated on pages 5, 6, 7 and 8.

Cable harness The cable harness for connecting to the control unit is 6 m long (standard length) and connected to the junction box on delivery.

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!

WARNING! WARNING!

No equipment besides that specified may be connected to the DEC2 cable harness. Doing so will risk injury to the operator and damage to the engine or the equipment being powered by it. Sensors and monitors for the DEC2 system must not be used for other purposes.


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Program 99

Sensors and monitors on the DC12

1. 2. 3. 4. 5. 6.

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Boost pressure Charge air temperature Oil pressure Junction box Coolant temperature Engine speed

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Program 99

Sensors and monitors on the DI12

1. 2. 3. 4. 5. 6.

6

Boost pressure Charge air temperature Oil pressure Junction box Coolant temperature Engine speed

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Program 99

Sensors and monitors on the DI14 (locations identical to DC14)

1. 2. 3. 4. 5. 6.

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Boost pressure Junction box Charge air temperature Oil pressure Coolant temperature Engine speed

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Program 99

Sensors and monitors on the DI9 (locations identical to DC9)

1. 2. 3. 4. 5. 6.

8

Charge air temperature Coolant temperature Junction box Boost pressure Oil pressure Engine speed

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Program 99

DEC2 control unit

1. 2. 3. 4. 5. 6. 7. 8. 9.

Bracket for insulating the control unit Calibration potentiometer Multipin connector Communication / Diagnostics port LED display DIP switches, under rubber cover Calibration test point Joint sleeve Hose for boost pressure from engine

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Program 99

Avoid earthing the control unit

Location - The control unit should be located away from the engine but not farther away than that the accompanying cable harness will reach.

The cover on the control module with program version 7.0 is connected directly to the negative terminal on the circuit board. In this way, the cover is connected directly to battery minus.

- Place the control unit upright as illustrated to avoid condensation in the boost pressure hose and allow it to run off the cover.

This has been done to further protect the control unit against electrical interference.

- The LED display must be easy to read while the engine is running and when performing fault diagnosis. - The COMM/DIAG port must be easily accessible for connecting.

Note: The COMM/DIAG port may be used by qualified personnel only. - Place the control unit so that the multipin connector, the connector for the boost pressure line, the adjusting screw and the calibrating pin on the control unit are easily accessible. - The control unit must not be located in close vicinity to electrical fields.

Note: The control unit must be calibrated after renewing it or the injection pump. See Adjustment and calibration, 03:02-03 .

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To avoid “earth faults”, especially on two-pin installations, the DEC2 control unit cover must be electrically isolated from e.g. the hull of a ship. This is important to consider even when renewing a control unit with program version V6.0, as only control units with program V7.0 are supplied as a spare part.

Boost pressure hose We recommend fitting the boost pressure hose at an angle with the jointing sleeve at the lowest point. Open the jointing sleeve at regular intervals, preferably with the engine running under light load, to drain away any condensation.

Note: Whenever removing or renewing the control unit, disconnect the boost pressure hose at the jointing sleeve. Do not disconnect the hose from the control unit as the connector can be damaged very easily.


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Program 99

Electrical connections on all engines General

Cables to terminals C36 and C90:

Before starting an engine with DEC2 control unit, a number of electrical connections on both the standard version and with optional equipment must be made.

Leads and other equipment for the control panel are not included in the delivery from Scania.

It is mainly the wiring from the open 12-pin connector (C36) and the 8-pin connector (C90) in the cable harness from the control panel that must be connected on installation. Leads and components for the cable harness to the control panel are not included in the delivery from Scania with the exception of the terminal sleeves and terminals to be connected to the accompanying cable harness. It is essential that a contact pressing tool of high quality be used for assembling terminals to the customised cable harness.

Concerning the different functions of the switches (both standard and optional) and how they are connected, refer to the next page. The wiring diagrams can be found on pages 19 to 25. Switches S16, S17, S18, S19 and S24 are to be placed on the control panel if used. Switch S20 (lamp test/fault code test) should be place close to the control unit so that the LEDs on the DEC2 unit can be seen while turning on the switch.

We recommend using the DEUTSCH hand pressing tool, part no. DTT-16-00.

1. Scania standard cable harness 2. Customised cable harness Concerning connections to terminals C36 and C90: See pages 19 and 23

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Program 99

Electrical connections for all-speed engines Connecting alternative signal source to the DEC2 throttle actuation signal input The diagram below shows how to connect an alternative signal source. The difference in voltage between pin B8 (signal) and pin A7 (reference) must be adjusted to the following values: • 0,40-0,42 V DC for idle speed (control lever in min. position) • 2,90-2,95 V DC for maximum engine speed (control lever in maximum position) - Maximum input impedance for analogue converter: 10 kohms - Idling switch (ISS) input, C10, must be connected to battery + (24V DC). Otherwise, the engine speed will not be able to exceed approximately 1200 rpm (fixed engine speed). - The throttle actuation sensor magnetisation, C8, must not be connected. See diagram.

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- It is also essential the signal source be electrically insulated from the DEC2 throttle actuation signal input in order to protect against EMI (electromagnetic interference), earth faults and other interference that may cause problems with performance/function.

Warning! If the voltage exceeds 5V DC, the DEC2 signal input can be damaged. Note: If the throttle actuation signal is delayed or is outside permitted limits when the DEC2 unit is powered up, it may result in a fixed engine speed of 900 rpm + engine speed droop or closedown depending on the position of DIP switch 5 ON = fixed engine speed OFF = closedown Measure the input signal on the DEC2 unit.


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Program 99

Connecting standard sensor to the DEC2 throttle actuation signal input

The Scania accelerator pedal sensor (APS) can be used as a throttle actuation sensor for various applications, since the signal input in the DEC2 unit is adapted to the specifications of this sensor. On delivery, the accelerator pedal sensor also includes the necessary contact housings and cable terminals for connecting it to a customised cable harness.

Concerning the connection of a Scania APS, see page 24

Description of connections to terminals C36 and C90 Connection

Switch or terminal

Switch position or connection to

C36-1

C46-2

Battery +

Voltage supply

C36-2

C47-2

Battery -

System earth

S16-1 1)

Battery +

Isochronous control

Droop/ Isochronous

Battery -

Control of speed droop

Battery +

Alt 1: Allows temporary use of power/torque curve 2 2) Alt 2: Allows temporary use of power/torque curve 2 2)

Battery -

Allows temporary use of power/torque curve 1

Battery +

Drive position

Run/Stop

Battery -

Turns off the power stage for the control and the engine stops. The control unit is still supplied with voltage

S19-1 1)

Battery +

Maintains the engine speed at that specified by the potentiometer when engaged.

Speed Hold 4)

Battery -

No speed hold. Engine running in normal mode.

C36-3

S17-1

1)

C36-4 Power Control

S18-1 3) C36-5

C36-6

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Function description


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Program 99

Connection

Switch or terminal



Battery +

The control unit first performs a test of all the LEDs and the operator’s warning lamp for 2 seconds. After which a fault code will be displayed with the control unit LEDs for 5 seconds. The system returns to normal mode for 2 seconds and the procedure will be repeated if the switch is turned on. See Troubleshooting.

Battery -

Switch position for normal mode.

S20-1 C36-7

C36-8

Lamp test/Fault code test switch

W14-2 Warning lamp

Battery + via warning lamp

Operator’s main warning lamp should be placed on the control panel. It is essential the current strength be limited to 500 mA so that it does not affect the function of the interface.

Battery +

Connect to the idle/safety switch C189-2 when the Scania accelerator pedal sensor is included in the system.

Battery +

If another signal source is used, connect it directly to battery + . See circuit diagram and specification on page 12.

C189-2 C36-9

Idle/Safety switch

C190-A / D35

C36-10

Voltage supply for throttle actuation sensor

TPSE in control unit

-

-

Connect to terminal C190-A for the throttle actuation sensor when the Scania accelerator pedal sensor is included in the system.

Do not connect if another signal source is used.

C190-B / D35

C36-11

Return from throttle actuation sensor

TPSR in control unit

Connect to terminal C190-B for the throttle actuation sensor when the Scania accelerator pedal sensor is included in the system.

-

Connect as reference for the analogue converter if another signal source is used. See circuit diagram and specification on page 12.

TPSS in control unit

Connect to terminal C190-C for the throttle actuation sensor when the Scania accelerator pedal sensor is included in the system.

-

Connect as reference for the analogue converter if another signal source is used. See circuit diagram and specification on page 12.

C190-C / D35

C36-12

Signal from throttle actuation sensor

-

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Program 99



Battery +

If the injection pump is not equipped with fuel shut-off valve, connect to battery + when the engine is to be run. The fuel shut-off valve can also be used as a shut-down device. In this case, a separate switch and relay must be coupled into the circuit. For emergency shut-down only.

C90-2

Fuel shut-off valve EHAB only

Battery -


C90-3

Reserved 4)

Battery -

-

C90-4

Reserved 4)

Battery -

-

Connection

C90-1

Switch or terminal

Fuel shut-off valve EHAB or ELAB

C90-5

-

-

Load indicator signal (LIS), 0 - 4 VDC, corresponding to 0 - 100% power output from engine. Signal uses TPSR (C36-11) as reference earth.

C90-6

-

-

Connects to TPSR (C36-11) when load indicator signal (LIS) is used

C90-7

-

-

Reserved

C90-8

-

-

Reserved

1) Optional switch. 2) Possibility of using power/torque curve 2 is an option on OEM equipment. 3) This switch should be used for normal shut-down of the engine without turning off the battery voltage.

4) The two reserved inputs must not consume any current but be connected to battery -. Note: It is essential that all connections to the separate inputs on the control unit (C36-3, C36-4, C36-5, C36-6, C36-7, C36-9, C90-3, C90-4) are connected to either battery + or battery - and not left open to avoid interference that affect the function of the circuit. The connections left “open” will act as aerials for interference, despite them being internally connected to battery -.

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15

Program 99

Electrical connections for fixed speed engines Fine adjustment of speed for fixed speed engines - The engine speed can be adjusted approximately ±100 rpm with potentiometer D8 via the trim input. To obtain a symmetrical speed adjustment, DIP switch 7 must be set to OFF, see page 9. - The Speed Hold switch must be set to Battery position in order to carry out speed adjustment via the trim potentiometer. - Fine adjustment of the speed is disengaged when the Speed Hold switch is set to Battery +, which means the potentiometer cannot affect the speed setting.

- If a trim potentiometer is not connected, the Speed Hold switch must be set to Battery + to disengage the fine speed adjustment. - If the Speed Hold switch is set to Battery when there is no trim potentiometer present, the control unit will automatically apply full negative trim, -100 rpm. - The logic used for smooth increase in engine speed and speed droop is independent of the trim input and therefore does not interact.

Description of connections to terminals C36 and C90 Connection

Switch or terminal


C36-1

C46-2

Battery +

Voltage supply

C36-2

C47-2

Battery -

System earth

S16-1 1)

Battery +

Isochronous control

Droop/ Isochronous

Battery -

Control of speed droop

Battery +

Alt 1: Allows temporary use of power/torque curve 2 2) Alt 2: Allows temporary use of power/torque curve 2 2)

Battery -

Allows temporary use of power/torque curve 1

S18-1 3)

Battery +

Drive position

Run/Stop

Battery -

Turns off the power stage for the control and the engine stops. The control unit is still supplied with voltage

S19-1 1)

Battery +

Maintains the engine speed at that specified by the potentiometer when engaged.

Speed Hold 4)

Battery -

No speed hold. Engine running in normal mode.

C36-3

S17-1

1)

C36-4 Power Control

C36-5

C36-6

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19:01-19

Program 99

Connection

Switch or terminal



Battery +

The control unit first performs a test of all the LEDs and the operator’s warning lamp for 2 seconds. After which a fault code will be displayed with the control unit LEDs for 5 seconds. The system returns to normal mode for 2 seconds and the procedure will be repeated if the switch is turned on. See Troubleshooting.

Battery -

Switch position for normal mode.

S20-1 C36-7

C36-8

Lamp test/Fault code test switch

W14-2

Battery + via warning lamp

Warning lamp

S24 - C36-9

4)

-

Battery +

Operator’s main warning lamp should be placed on the control panel. It is essential the current strength be limited to 500 mA so that it does not affect the function of the interface. Connects to separate Idle/Run switch (S24) that switches between battery- for idling and battery + for running. Must always be connected to battery + unless the Idle/Run switch (S24) is used.

C190-A / D8-3 C36-10

Voltage supply for throttle actuation sensor

TPSE in control unit

-

-

Connect to trim potentiometer D8-3 (option)

Not applicable

C190-B / D81: C36-11

Return from throttle actuation sensor

TPSR in control unit

-

-


Not applicable

C190-C / D8-2 C36-12

Signal from throttle actuation sensor

TPSS in control unit

-

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Not applicable


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Program 99



Battery +


C90-2

Fuel shut-off valve EHAB only

Battery -


C90-3

Reserved 5)

Battery -

-

C90-4

Reserved 5)

Battery -

-

C90-5

-

-

C90-6

-

-

C90-7

-

-

Reserved

C90-8

-

-

Reserved

Connection

C90-1

Switch or terminal

Fuel shut-off valve EHAB or ELAB

Signals for load distribution and synchronisation 6)

1) Optional switch. 2) Possibility of using power/torque curve 2 is an option on OEM equipment. 3) This switch should be used for normal shut-down of the engine without turning off the battery voltage.

4) Concerning the fine speed adjustment function, see page 16. 5) The two reserved inputs must not consume any current but be connected to battery -. 6) Get in touch with Scania’s suppliers of GAC equipment directly: Huegli Tech AG. Note: It is essential that all connections to the separate inputs on the control unit (C36-3, C36-4, C36-5, C36-6, C36-7, C36-9, C90-3, C90-4) are connected to either battery + or battery - and not left open to avoid interference that affect the function of the circuit. The connections left "open" will act as aerials for interference, despite them being internally connected to battery -.

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19:01-19

Program 99

Wiring Diagrams A complete wiring diagram can be found on drawing 1456343.

Summary of connections to terminals C36 and C90

A B

These three cables must be twisted 40 turns/metre All-speed engines: Signals for load indication Fixed-speed engines: For load distribution and synchronisation equipment only

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19

Program 99

Key to component designations Example:

S16-1 S16

Component code in wiring diagram

1

Terminal or connection point for the component = twisted leads

Lead designations in circuit diagram Example:

30DEC.rd-2.5+C46-2 means: 30DEC

lead marking

bn

lead colour code

1.5

cable area in mm 2, 1.0 mm2 if no area specified

C46

Component to which lead is connected

2

Terminal or connection point

Colour codes for electrical wires Code

Colour

bk

black

bn

brown

rd

red

og

orange

ye

yellow

gn

green

bu

blue

vt

violet

gy

grey

wh

white

pk

pink

20

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19:01-19

Program 99

List of components for wiring diagram Comp

Description

Remarks

B25

Switch

Idle safety switch

B26

Switch

Kick-down, used only on vehicles with automatic gearbox.

C36

Connector

12-pin

C38

Connector

3-pin

C39

Connector

2-pin

C40

Connector

2-pin

C41

Connector

2-pin

C42

Connector

2-pin

C43

Connector

2-pin

C44

Connector

2-pin

C45

Connector

2-pin

C46

Connector

1-pin

C47

Connector

1-pin

C90

Connector

8-pin

C92

Connector

2-pin

C155

Connector

2-pin

C189

Connector

2-pin

C190

Connector

3-pin

C191

Connector

3-pin

D8

Potentiometer

Fixed speed engine

D35

Potentiometer

All speed engines

E6

Control unit

DEC2

E6

Control unit

DEC2

F7

Fuse

16 A, battery +24 V

F8

Fuse

16 A, battery minus

F9

Fuse

5 A, battery +24 V

F10

Fuse

5 A, battery minus

P1

Battery

R20

Relay

Supply 16 A

R22

Relay

Supply 5 A

S16

Switch

Droop/Isochronous

S17

Switch

Power Control

S18

Switch

Run/Stop

S19

Switch

Speed hold / No speed hold

S20

Switch

Lamp test / Fault code

S23

Switch

On / Off, power supply

S24

Switch

Idle / Run

T18

Sensor

Engine speed

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21

Program 99

Comp

Description

Remarks

T19

Sensor

Coolant temperature

T20

Sensor

Charge air temperature

T22

Charge air outlet from engine

Boost pressure

T24

Monitor

Oil pressure

V3

Solenoid valve

Fuel shut-off

W14

Indicator lamp

Diagnostics

22

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19:01-19

Program 99

Connection to control unit and cables to control panel

A B C D E F

Note: Dotted leads and components are NOT included with delivery from Scania.

Main switch Cable harness to control panel Load indicator signal Cable harness to engine Air hose to the engine Joint coupling

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23

Program 99

Components in control panel

A B C

24

Throttle actuation sensor for all-speed engines Trim potentiometer and switch for idle/run for fixed-speed engines Cable harness to C36 and C90

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Note: Dotted leads and components are NOT included with delivery from Scania.


19:01-19

Program 99

Components on the engine

A B C D

Junction box, engine Applies to D9/D12/D14M Applies to D14A Applies with EHAB

19:01-19

E F G H

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Applies with ELAB Not connected Cable harness to control unit Air hose to control unit


25

Program 99

Specifications Control unit Voltage supply: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rated 24 V DC The control unit is transient and polarity protected by a series diode. Operating voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The DEC2 unit is designed for operating with a battery voltage of 15 to 32 V DC. Power consumption: . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 A max plus control drive stages 8 A continuous, 20 A max. Polarity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Negative earth, body must be insulated on 2-pin system Temperature range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 °C to +65°C Relative humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Up to 95% Surface treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fungus and corrosion resistant

Solenoid switch Resistance at 20°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 - 0.8 Ω, Injection pump with ELAB 0.6 - 1.2 Ω, Injection pump with EHAB 0.6 - 1.2 Ω, Injection pump with mechanical stop lever Measured between C39 1 and 2

Control rod sensor Resistance at 20°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 -23 Ω, measure between: C38 A and B, C38 A and C

Temperature sensor Resistance at °C for complete sensor. . . . . . . . . . . . . . . 37 334 13 329 5 382 2 410 621 207 129 69

± 5 041 Ω ± 1 491 Ω ± 355 Ω ± 195 Ω ± 58 Ω ± 23 Ω ± 16 Ω ± 11 Ω

-40°C -20°C 0°C 20°C 60°C 100°C 120°C 150°C

Engine speed sensor Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486-594 Ω Inductance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187-253 mH, measured between C41-1 and 2 Distance between sensor and flywheel/gear ring. . . . . . 0.5 - 1.5 mm

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19:01-19

Program 99

Fuel shut-off valve Resistance at 20°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ELAB: 1-pin, 42 - 48 Ω Measured between C155 -1 and earth EHAB: 2-pin, 35 -50 Ω Measured between C155 -1 and 2

Oil pressure monitor Opening pressure on rise . . . . . . . . . . . . . . . . . . . . . . . . 1.1 ± 0.15 bar Closing pressure on drop . . . . . . . . . . . . . . . . . . . . . . . .0.7 ± 0.15 bar

Current consumption for separate inputs/outputs Current consumption:. . . . . . . . . . . . . . . . . . . . . . . . . . .less than 100 mA Applies to following separate inputs: Idle safety switch . . . . . . . . . . . . . . . . . . . . . . . (B25 Droop/Isochronous. . . . . . . . . . . . . . . . . . . . . . (S16) Power Control . . . . . . . . . . . . . . . . . . . . . . . . . (S17) Run/Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (S18) Speed hold / No speed hold . . . . . . . . . . . . . . . (S19) Lamp test / Fault code . . . . . . . . . . . . . . . . . . . (S90) Idle / Run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (S24)

C90-3 and C90-4 (reserved) must not consume any current but be connected to battery -.

Current consumption for throttle actuation signal input Current consumption: Input for accelerator pedal sensor or trim potentiometerless than 20 mA

Speed trimming input (fixed speed): • 5 kohm potentiometer • 0.5 - 4.0 VDC operating voltage (0 - 5 VDC max)

19:01-19

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SCANIA_DEC2 Eng Control Instal Instructions

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