Specifications

EMC-CS-2009.1

February 11, 2010

10.0 Conducted Transient Emissions: CE 410

These requirements are applicable to the following component categories:

Electronic Modules: AX, AY

Electric Motors and Inductive Devices: BM, EM, R

10.1 Requirement

The component shall not produce transient voltages magnitudes exceeding +75 / - 100 volts on its power supply circuit(s).

10.2 Test Verification and Test Setup

The DUT shall be tested in accordance with ISO 7637-2, except where noted in this specification, using the test setup

illustrated in Figure 10-1.

• The DUT power circuit(s) shall be connected directly to the Artificial Network through either mechanical or

electromechanical switch with a single set of contacts. The switch shall have the following characteristics:

- contact rating: I ≥ 30 A or twice the rated current of the DUT (which ever is greater), continuous, resistive

load

- no suppression across relay contact;

- single/double position contact electrically insulated from the coil circuit

- Coil with transient suppression (applies only to electromechanical relay)

The actual switch used for testing shall be specified in the EMC test report.

• The wiring between the DUT and the Artificial Network shall be 200 +/-50 mm in length. No other connections shall

be made between the switch and the DUT.

• The supply voltage to the DUT shall be +15 -0.5/+0 volts. The power supply shall have a short circuit current

capability 100 amperes or twice the specified stall current of the DUT. The negative terminal of the power supply

shall be connected to the ground plane.

• A digital sampling scope shall be used for the voltage measurements using a capable sampling rate of 1 Giga-samples

per second (single acquisition capability) and a minimum memory depth of 2048 samples. The bandwidth shall be

greater than 100 MHz. The voltage shall be measured using a 1:100 probe (< 4 pf). See ISO 7637-2 for additional

requirements

• The DUT shall be placed on an insulated support 50mm above the ground plane. A DUT with an outer metal chassis

may be electrically connected to the ground plane only if the DUT's design requires that its chassis must be grounded

to the vehicle for functionality (the DUT engineering specification must state this requirement). The DUT's grounding

configuration shall be documented in the EMC test plan and test report.

• If the DUT is an electric motor or actuator, it shall be tested in the “stall” condition unless analysis demonstrates this

condition can not occur. If the motor contains internal protection (e.g. PTC device) that would limit or interrupt

current to the DUT during a stall condition, testing shall be performed with the maximum rated mechanical load on the

motor/actuator.

10.3 Test Procedures

a) Close the external switch contacts (see Figure 9-1) and power up the DUT. Verify the DUT is functioning properly.

b) Set the oscilloscope time base to 1 msec/div.

c) Set the oscilloscope for single acquisition mode ("single shot"). Set the trigger level to +10 volts.

d) Open and close the external switch contacts to verify the scope properly triggers. Do not proceed until triggering has

been verified!

e) Repeat steps a) through c) except the trigger level of the digital sampling scope shall be set to +80 volts .

f) Adjust the oscilloscope sampling rate to the highest level available for the time base selected.