LD Didactic Sensor Panel 2 Instruction Manual

02/18-W2013-Wei

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

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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 [phone] • Fax [phone] • E-Mail: [e-mail]

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

Technic al alterations reser ved

Instruction Manual 739 708

Sensor Panel 2

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6

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

d

= 12 V

H

= 7 V

H

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 [phone] . web: www.ld-didactic.com . e-mail: [e-mail]

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

Technical alterations reserved