LD Didactic Sensor Panel 2 Instruction Manual

02/18-W2013-Wei

- The device is appropriate for in ter ior use only!

7 8 9 10 11 12

1 Description

This device is used to examine the operation of various analog and digital sensors. The device is equipped with original sensors for monitoring the differential pr essure of a DPF as well as for detec ting the position of the acc elerator pedal, the neutral position of the transmission, and the brake pedal. The knocking sensor 739 03 can also be c onnected to it. The device is intended for use in educati onal institutions. Use in a r eal vehicle (including use of individual components) is not permitted.

Safety Note

- Use only safety bridging plugs and safety connection leads!

- Be careful not to short-circuit the power supply. Fire hazard!

- The device should only be used for training purposes. Installation in an actual vehicle is prohibited!

LD DIDACTIC GMBH • Leyboldstrasse 1 • D-50354 Hürth • Phone (02233) 604-0 • Fax (02233) 604-222 • E-Mail: info@ld-didactic.de

Technic al alterations reser ved

Instruction Manual 739 708

Sensor Panel 2

1 Connections Plus Terminal 30 and Terminal 15 2 Slot for CAN Terminating Resis tance STE

120 Ω 3 Connections and Fuses 4 Connection Socket CAN H and CAN L 5 Display for a Lack of Short-circuit to Ground 6 Sensitivity Adjustment and Output Signal for

the Knocking Sensor with Display 7 Short-circuit to ground Terminal 31 8 Sensor for Low Pressure 9 Sensor for Accelerator Position 10 Sensor for the Neutral Position of the Transmis-

sion 11 Sensor for Brake Pedal 12 Connection for Knocking Sensor

2 Scope of the delivery

Sensor panel 2, 739 708

Not included, but recommended accessory equipment:

• Set of 10 magnets 689 0815

• CAN-Databus-Multi-Adapter 773 961

• Knocking sensor 739 03

• PVC tubing, 7 mm diam., 1 m 667 193

• Hand vacuum pump 375 58

• Automotive fault simulator 738 491

• Connecting leads, set of 7 739 195

User manual Page 2/4

3 Technical data

Supply voltage: U = 12 V=

differential pressure indicator

Supply voltage: U = 5 V= Interface: SENT (3 µs) acc. to SAE J2716 Pressure range: 0-125 kPa SENT channels: FDC with pause, slow channel SENT signals: 1*12 bit, single secure

Accelerator position transdu cer

Supply voltage: U = 12 V= Interface, pedal sensor: SENT (3 µs) acc. to SAE J2716 Sensitivity: 3 mT SENT channels: FDC without pause, slow ch. SENT signals: 1*12 bit

Neutral gear position transducer

Interface: PWM Supply voltage: U = 5 V= Low level: UL < 1 V High level: UH > 4 V Frequency: f Pull-up resistor R = 1 kΩ

Brake light/pedal switch

Interface, brake pedal: Digital Interface, brake light: Digital High level: U

Knock sensor amplifier

Input filter: fg = 1.6 kHz High level: U Pulse width: tkn = 400 ms

= 125 Hz

= 12 V

= 7 V

4 Setup and Functional Checks

 Connect th e device to the po wer supply at T erminals

15 and 30 (1) and the ground (7).

 Insert the 4-m m safety bridging plugs int o the socket

(3) above the control unit as well as in all socket pairs below the control unit.

 Insert a bridging plug into position 2 to activate the

CAN terminating resistor.

 Turn on the supply voltage and the ignition.

5 Functional description

Differential Pressure Indicator (8)

Based on the meas ured differential pressure between Filter Outlet (P1) and Filter Inlet (P2), the pressure sensor determines the actual exhaust flow through the diesel p articulate filter and thus the degree of clogging of the filter. This value is

transmitted via a SENT interface to the engine control unit. If the determined value exceeds a limit stored in the c on tr ol u nit, a regeneration process is initiated to burn the residues present in the particulate filter.

Accelerator Pedal Position Indicator (9)

The detection of the accelerator pedal position takes place with a Hall-ef fect linear sensor, type HAL283 with a SENT interf ace. Thus, voltage is generated proportional to the magnetic flux through the Hall element.

Indicator for Neutral Position of Transmission (10)

This is an active distance sensor based on the Hall effect with a PW M interf ac e. T he sens or reac ts to magnetic field chan ges b y chang ing the Hall voltage. Under the influence of a magnetic field or a ferromagnetic material, the sensor generates a pulse width modulated signal, in whose duty cycle the distance as well as the polarity of the magnetic field is coded. A small depr ession on t he magnet holder marks the north pole.

LD DIDACTIC GMBH . Leyboldstrasse 1 . D-50354 Huerth . Phone +49 2233 604-0 . web: www.ld-didactic.com . e-mail: info@ld-didactic.de

by LD Didactic GmbH Printed in the Federal Republic of Germany

Technical alterations reserved

Page 3/4 User manual

Bytes 2-4, all bits

Differential pressure

101

Enhanced Message

Brake Light / Brake Pedal Switch (11)

Contactless, combination brake light / brake pedal switch based on the H all effect, which gen erates a digital signal for the actu ation of the brak e light, and a corresponding inver ted s ignal f or anal yzing the brake pedal position. T he sensor is sensitive to polarity.

CAN bus

Differential pressure sensor G505:

The sensor signals are mirrored internally on the CAN bus. The following signals are sent:

CAN-ID Length Position Signal

100 8

(byte 2 = nibble 0, byte 3 = nibble 1, byte 4 = nibble 2)

Conversion: p = -(x-800)/3 [mbar] where x = nibble 0 to

Optional: Knocking Sensor (12)

The signal from the knocking sensor is filt ered in order to suppress electric al noise. The sens itivity can be adjusted at Potenti ometer 6, for which a knocking signal is detec ted. This is then visua lly displayed and outputted as a pulse of approx. 400 ms in width and 7 V in amplitude at 4-mm output.

102 4 Short Message 200 2 Byte 1, bits 0-15 Distance 300 1 Byte 1, bit 0 Brake light

Note: Numbering system of bytes: 1 (left) to 8 (right) Numbering system of bits: 0 (right) to 7 (left)

Example of converting the differential pressure: CAN message $100: 0D 06 09 0F 03 01 09 04

p = -(69Fh – 800)/3 = -(1695-800)/3 = -298 mbar

User manual Page 4/4

accelerator pedal position







Accelerator pedal sensor G79:

The sensor signals are internally mirrored on the CAN bus. The following signals are transmitted:

CAN-ID Length Position Signal

100 5 Bytes 3+4, bits 0-7 102 4 Short Message

200 2 Byte 1, bits 0-15 Distance 300 1 Byte 1, bit 0 Brake light

Hint: Counting of bytes: 1 (left) to 8 (right) Counting of bits: 0 (left) to 7 (right)

Example for converting the pedal value: CAN message $100: 0D 00 06 09 04

α = (69h-75)/4 = -(105-75)/4 = 7.5°

Indicator light "CAN ACTIVE"

The control unit is equippe d with two LEDs that indicate the current operating status. The red LED is o n continuously during norm al operation. The gr een LED blinks for each CAN output, regardless of whether SENT messages, analog values, or digital values are outputted.

6 Fault Switch Connection

On the back, there is a 7-pin socket to connect an

automotive fault simulator 738 491 using a 7-pin connection cable, wh ich is included in 739 195. This f ault

switch can be used to apply faults to the following signals: Contact Y1 G505, signal SENT 1

Contact Y2 F+F63, Signal T 54 Contact Y3 G701, signal PWM Contact Y4 F+F63, signal 0/I Contact Y5 G79+G185, signal SENT 2-1 Contact Y6 G61, signal knock sensor (13)

Select the corresponding channel Y1-Y6 on the fault simulator by pressin g the "Fault channel" buttons,

. Then select the fault to be switched by pressing the

"fault code" buttons,

or .

The following faults are recommended: #4 Short circuit to ground

#6 Short circuit 500 #7 Short circuit 500

Ω to T 30 Ω to ground

To activate the fault, press the "SET" button; to deactivate it, press the "RESET" button. For add itional details about the automotive fault simulator 738 491, refer to the instructions for use.

7 Disposal

Electric and electronic products must not be disposed of in household waste. Dispose of the unusable products in accordance with the applicable legal regulations.