Specifications

EMC-CS-2009.1
© Copyright Ford Motor Company – All Rights Reserved Page 69 of 121
February 11, 2010
Table 18-2: CI 250 Delay Time Sequences 1 - 4
d1 0.1 ms d6 0.4 ms d11 0.2 ms d16
0.1 ms
d2 0.5 ms d7 0.3 ms d12 0.3 ms d17
0.1 ms
d3 0.2 ms d8 0.4 ms d13 0.6 ms d18
0.3 ms
d4 0.7 ms d9 0.6 ms d14 0.5 ms d19
0.4 ms
Sequence
1
d5
0.5 ms d10 0.6 ms d15 0.3 ms d20
0.2 ms
d1 0.2 ms d6 0.8 ms d11 0.4 ms d16
0.2 ms
d2 1.0 ms d6 0.6 ms d12 0.6 ms d17
0.2 ms
d3 0.4 ms d8 0.8 ms d13 1.2 ms d18
0.6 ms
d4 1.4 ms d9 1.2 ms d14 1.0 ms d19
0.8 ms
Sequence
2
d5
1.0 ms d10 1.2 ms d15 0.6 ms d20
0.4 ms
d1 0.5 ms d6 2.0 ms d11 1.0 ms d16
0.5 ms
d2 2.5 ms d6 1.5 ms d12 1.5 ms d17
0.5 ms
d3 1.0 ms d8 2.0 ms d13 3.0 ms d18
1.5 ms
d4 3.5 ms d9 3.0 ms d14 2.5ms d19
2.0 ms
Sequence
3
d5
2.5 ms d10 3.0 ms d15 1.5 ms d20
1.0 ms
d1 1 ms d6 4 ms d11 2 ms d16
1 ms
d2 5 ms d6 3 ms d12 3 ms d17
1 ms
d3 2 ms d8 4 ms d13 6 ms d18
3 ms
d4 7 ms d9 6 ms d14 5 ms d19
4 ms
Sequence
4
d5
5 ms d10 6 ms d15 3 ms d20
2 ms
dn represents the delay between consecutive pulses
18.2 Test Verification and Test Setup
Testing shall be performed using either of the test Setups shown in Figure 18-5a or 18-5b. Selection of the test setup is based
on analysis by the FMC EMC group of how the DUT will be grounded in typical vehicle applications. The test configuration
shall be documented in the EMC test plan.
• The test harness connection between the DUT to the Load Simulator shall be < 2000 mm. Individual ground circuits
may be part of the cable harness or split out as illustrated in the figures. If the DUT has multiple ground circuits, they
shall be test separately.
• Ground circuits not being tested shall be connected directly to the ground plane.
• The DUT and any electronic hardware in the Load Simulator shall be powered from an automotive battery or linear
DC power supply (see paragraph 4.5.4 for requirements). Power circuits to the DUT shall be connected to the power
supply. The power supply negative terminal shall be connected to the ground plane.
• The DUT and wire harness shall be placed on an insulated support 50 mm above the ground plane.
• The source used for generation of the continuous and transient disturbances is shown in Figure 18-5.
The signal source illustrated in Figure 18-6 includes two isolation transformers. The transformers are used to facilitate
generation of the required disturbances into a 0.5 ohm load using most commercially available amplifiers. The
transformers also facilitate DC isolation of amplifier from the DUT. Alternative configurations may be permitted if
approved by the FMC EMC department.