Specifications

EMC-CS-2009.1
© Copyright Ford Motor Company – All Rights Reserved Page 60 of 121
February 11, 2010
16.2 Test Verification and Test Setup
Verification of component performance shall be in accordance with ISO 7637-2 except where noted in this specification.
• Test pulses A, B, and C shall be generated using the transient generator described in Annex F.
• Test pulses E, F and G shall be generated using a transient generator conforming to the requirements of ISO 7637-2.
• The test setup for application of Pulse G1 requires that a 0.5 ohm resistor be connected externally across the
Test Pulse Generator. This modification is shown in Figure 16-5.
• Test pulse G2 shall be generated using the circuit illustrated in Figure 16-6. The diode bridge shall be designed to
yield the open circuit voltage waveform shown in Figure D-10 of Annex D.
• The DUT and any electronic hardware in the Load Simulator shall be powered from a vehicle battery (see paragraph
4.5.4 for requirements). Artificial Networks shall not
be used as part of the test setup.
• The test harness connecting the DUT to the Load Simulator and transient pulse generator shall be < 2000 mm in
length. Individual ground circuits may be part of the cable harness or split out as illustrated in the setup figures below.
If the DUT has multiple power (e.g. battery direct, ignition/run, relay) and/or input circuits, these circuits shall be
configured to facilitate individual application of test pulses.
• The DUT and test harness shall be placed on an insulated support 50 mm above the ground plane.
• A device powered from an external, unregulated supply located in another module shall be tested as a system with the
sourcing module or an equivalent power supply. Details of this setup shall be documented in the EMC test plan.
Figure 16-1 illustrates the generic test setup for testing of a single DUT power supply circuit with a remote ground
connection.
Figure 16-1: CI 220 Test Setup for Devices with a Single Power Supply Circuit
Denotes Connection
To Ground Plane
Denotes Connection
To Ground Plane
Denotes Connection
To Ground Plane
Denotes Connection
To Ground Plane
Denotes Connection
To Ground Plane
Insulator
Ground Plane
Test Pulse
Generator
Ground Plane
Test Pulse
Generator
DUT
DUT
Power
Supply
+
-
Battery
+
-
Test
Fixture
Test
Fixture
Test
Fixture
Test
Fixture
Test
Fixture
Test
Fixture
Test
Fixture
Test
Fixture
Test
Fixture
Figure 16-2 illustrates the test setup for devices with two supply circuits. In this configuration, the untested power supply
circuit (U
1
) is connected directly to the battery. If the device has additional power supply circuits operating at the same
voltage, those circuits should also be connected directly to the battery.