Specifications

EMC-CS-2009.1
© Copyright Ford Motor Company – All Rights Reserved Page 50 of 121
February 11, 2010
13.0 Coupled Immunity: RI 130
These requirements are related to component immunity from wire-to-wire coupling of unintended transient disturbances.
These disturbances originate from switching of inductive loads including solenoids and motors. These requirements are
applicable to the following component categories:
Electronic Modules: A, AS, AM, AX, AY
Electric Motors: EM
13.1 Requirements
The device shall operate without deviation when exposed to coupled transient electromagnetic disturbances created from
switch contact arching and bounce. The requirements are delineated in Table 13-1. The source transient disturbance
characteristics are identical to Modes 2 and 3; Pulses A2-1 and A2-2. See Annex D regarding details of these transient
waveforms and the mode of application.
Table 13-1: RI 130 Coupled Immunity Requirements
Functional Performance
Status
Mode Pulse
Class A Class B Class C
A2-1
2
A2-2
I I I
A2-1
3
A2-2
I I I
13.2 Test Verification and Test Setup
Verification shall be performed using the basic test setup shown in Figure 13-1. The setup involves removal of a individual
wires from the DUT wire harness and placed in the test fixture for testing. Information regarding testing of twisted and/or
shielded wires may be found in Annex H along with a basic description of the test fixture. Details regarding fabrication of
the test fixture are found at http://www.fordemc.com
. Information regarding the transient pulse characteristics and the
transient generator may be found in Annex D and F respectively.
• The DUT and any electronic hardware in the Load Simulator shall be powered from a vehicle battery or a linear power
supply (see paragraph 4.5.4 for requirements). The battery or power supply negative terminal shall be connected to
the ground plane bench. The battery/power supply may be placed on the floor below or adjacent to the test bench.
• The DUT power and power returns shall be connected to the battery/power supply via Artificial Networks (ANs). The
ANs shall conform to CISPR 25. The ANs measurement ports shall be terminated with 50 ohms.
• The Transient Generator shall be powered from a vehicle battery (See Section 4.5.4 for requirements). The metal case
of the transient generator shall be connected to the ground plane. See Annex F regarding details of the transient
generator.
• The DUT and all parts of the test setup shall be a minimum of 100 mm from the edge of the ground plane.
• A digital sampling oscilloscope shall be used for test voltage/current verification. The oscilloscope shall have the
following capabilities:
• A minimum capable sampling rate of 1 Giga-samples per second (single shot capability).
• A minimum memory depth of 8 mega-samples for a single channel.
• Voltage and current probes are required to facilitate verification of the transient disturbance. Requirements for these
probes are found in Figure 13-1.
• If the outer case of the DUT is metal and can be grounded when installed in the vehicle, the DUT shall be electrically
bonded directly to the ground plane during testing. If the DUT case is not grounded in the vehicle, the DUT shall be
placed on an insulated support 50 mm above the ground plane.