Specifications

EMC-CS-2009.1
© Copyright Ford Motor Company – All Rights Reserved Page 111 of 121
February 11, 2010
Annex F (Normative): Transient Test Generator
The test generator presented in this annex produces transients for the following test methods:
• RI 130
• CI 220 Pulses A1, A2, and C
Figure F-1 illustrates the transient generator circuit that will produce CI 220 transient pulses A1, A2, and C in Modes 1, 2 and
3. The circuit contains a few critical components that may not be substituted without permission from the FMC EMC
department. These components are highlighted in the figures. Specific details about these test circuits including contact
locations for critical components may be found at http://fordemc.com
. Selection of test pulses and operating modes is
facilitated by simple switch settings. Table F-1 summarizes these switch configurations and associated test pulse/operating
mode.
Figure F-1: Transient Generator Circuit for RI 130 and CI 220
SW0
SW1
L1
R1
Q1
D1
RLY1
A
G
E
G
Pulse
A1, A2
Pulse
C
NC
C
SW2
SW3
L2
R3
R4
R2
C1
SW4
D
BNC Connectors
Ground to metal case
of Transient generator
B
C
GG
Short C and D for CI 220
Open C and D for RI 130
Key
R1: 51 ohms, 25W
L2: 100 mH inductor
(Osborne Transformer Part Number 32416)*
R2: 220 ohms ± 5% , 2W D1: Zener Diode, 39 V, 5W (1N5366A)
R3: 33 ohms ± 5% , 10W Q1: NPN transistor (TIP 41)
R4: 6 ohms ± 5% , 50W SW0 – SW4: Single Throw Switch (10 contact rating)
C1: 100 nF ceramic capacitor, 400V
RLY1: 12 volt AC Relay** Use normally closed (NC) contacts
(Potter & Brumfield KUP-14A15-12)*
L1: 5 uH inductor
(Osborn Transformer Part Number 8745)
*
* Critical Component, no substitutions permitted without written authorization from the FMC EMC department.
** See Table F-1 for relay specifications