Coupling Decoupling Networks (CDN's)

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The EMC Shop stocks coupling decoupling networks (CDN's) for most power and data line configurations. CDN's are quintessential for performing EMC testing. In short, conducted immunity coupling networks ensure electrical transients are sent down the path of the line to the EUT. Decoupling that signal from entering the rest of the network is done in different ways. In radiated immunity, you are coupling wireless signals over the air through the antenna. It may be appropriate to use a decoupling clamp on lines as they exit the test chamber.

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Coupling/Decoupling networks are built in to most current generators for single phase power EUT. Coupling networks are typically easy to set up for conducted immunity (surge, EFT, PQF). RF conduted immunity requires an assortment of couplers and without proper setup, are easy to blow up.

Type's of Coupling Decoupling Networks

CDN's for Surge/EFT Immunity: Power Lines and Data Lines
RF CDN's for Conducted Immunity: Power Lines and Data Lines: Used for just decoupling as well
EM Clamps: Inject and decouple RF disturbances
Absorbing Clamps: Just for decoupling RF disturbances on cables (Needed for BCI Testing)
Bulk Current Injection Probes: Used for just coupling RF noise

Coupling/decoupling networks for RF conducted immunity have a port top-side where your inject the RF signal, an EUT side where the RF disturbances are directed to power or data lines. The decoupling path exit the AE Side and is generally safe from disturbances.

Coupling Decoupling Networks (CDN's) Categories

Injection Transformers

Capacitors

Coupling Decoupling Networks (CDN's) Test Equipment, Systems & Solutions

3ctest CDN 418TH8 CDN For Unshielded Symmetric High-Speed

SKU: sku-1116

Communication Frequency: 10 MHz, 100 MHz, 1000 MHz, 10 MB, 100 MB, 1000 MB

Standard Met: IEC 61000-4-8

Pulse Voltage: 4 kV

Coupling Mode: 4-pair unshielded symmetric

Connector: RJ45 female connector

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3ctest SGN 3483T Three-Phase Coupling/Decoupling Network

SKU: sku-1111

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3ctest SPN/SEPN/EFTN Series Coupling/Decoupling Network

SKU: sku-1110

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Teseq (Schaffner) CDN 163 3-Phase, 100 Amp EFT/Burst Coupling Network

SKU: 1064

Applications: Electrical Fast Transient Immunity

Test Standards: IEC/EN 61000-4-4

Industry: EMC Precompliance Testing, CE Marking, Medical Devices, Industrial Machinery, Electronics & IT

For Use With: Any Burst/EFT Generator

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Teseq CDN S900S RS-232 Coupling Decoupling Network for IEC 61000-4-6

SKU: 10828

Weight: 1.5 kg (3.3 lbs)

Application/Test Type: Coupling / decoupling network (CDN) for screened data/telcom lines or coaxial cables

Common Mode Impedance: 150 kHz to 26 MHz: 150 Ω ±20 Ω; 26 MHz to 230 MHz: 150 Ω +60 Ω / -45 Ω

Current Rating: 250 mA (CDN ST08 1 Amp)

Decoupling of Common Mode Disturbance: 150 kHz: Over 60 dB; 1.5 MHz: Over 60 dB; 30 MHz: Over 50 dB; 230 MHz: Over 40 dB (refer to data sheet for some exceptions)

Dimensions: 4 x 4 x 9.5 inches (10 cm x 10 cm x 24 cm); (CDN HDMI and CDN S752A: 28.8 cm 11 inches)

Frequency Range: 10 kHz to 80 MHz or 150 kHz to 230 MHz

Mains & EUT Connections: BNC 50 Ω, N 50 Ω, BNC 75 Ω, N 75 Ω, XLR 3 pins, DIN 5 pins, RJ45, D-Sub 9 pins, D-Sub 15 pins, D-Sub 25 pins, HDMI (refer to data sheet for exact model specifications)

RF Connector: BNC 50 Ω

RF Input Voltage: 20 Volts Max

Standards Met: IEC 61000-4-6, CISPR 22, IEC 60601-1-2

Voltage Division Factor: 9.5 dB to 10 dB ±1 dB (refer to data sheet for some exceptions)

Voltage Rating: AC max. voltage (line to ground): 100 V - 250V; DC max. voltage (line to ground): 150 V - 400 V; Test voltage: 200 V - 750 V DC, 2 sec (refer to data sheet for exact model specifications)

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$1,190.00
Teseq CDN M016 Switchable 16 Amp Coupling/Decoupling Network

SKU: 10827

Associated Equipment: RF Conducted Immunity Test Systems

Application/Test Type: switchable 2 or 3 power lines, (L+N or L+N+PE)

Common Mode Impedance: 150 kHz to 26 MHz: 150 Ω ±20 Ω 26 MHz to 230 MHz: 150 Ω +60 Ω / -45 Ω

Current Rating: 16 Amps

Decoupling of Common Mode Disturbance: 150 kHz: Greater than 30 dB 1.5 MHz: Greater than 60 dB 30 MHz: Greater than 40 dB 230 MHz: Greater than 20 dB

Dimensions: 3.9" x 3.9" x 9.5" (100 mm x 100 mm x 240 mm)

Frequency Range: 150 kHz to 230 MHz

Insertion Loss: Less than 0.1 dB

Mains & EUT Connections: 4 mm banana

RF Connector: BNC 50 Ω

RF Input Voltage: 30 Volts (Max)

Standards Met: IEC/EN 61000-4-6

Voltage Division Factor: 150 kHz to 80 MHz: 9.5 dB ±1 dB 80 MHz to 230 MHz: 9.5 dB +3 dB / -2 dB

Voltage Rating: AC max. voltage (line to ground): 250 V DC max. voltage (line to ground): 400 V; 3 kV DC, 2 sec

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$195.00 - $495.00

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Schloder M Type CDN's for Disturbance Signals to Unscreened Supply Lines (mains) AC + DC up to 1000V, 100A

SKU: sku-791

Application/Test Type: unscreened supply lines (mains) AC + DC

Current Rating: 16A / 32A / 63 A / 100 A

Dimensions: 160 x 84,5 x 240mm or 200 x 122,5 x 400mm depending on model

Frequency Range: 150 kHz to 230 MHz

Mains & EUT Connections: banana sockets

RF Connector: 50 Ω BNC (Female)

Standards Met: IEC / EN 61000-4-6

Voltage Rating: up to 250 VAC / 400 VDC

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EFT-DLC EFT/Burst Capacitive Coupling Clamp for Data Lines

SKU: 1780

Application/Test Type: Electrical Fast Transients on Data Lines (EFT Burst)

Built in Accordance to: IEC 61000-4-4

Coupling Length: 1 m (39.4 in)

Compatible Impulse Generators: Any EFT/Burst Generators (custom HV cable may be required)

RF Connector: Fischer HV Connector

Voltage Rating: up to 5.0 kV

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$195.00 - $2,495.00

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Fischer Custom Communications FCC-801-M3-16A, 3 Line M Series CDN, 150 kHz – 230MHz, 16 Amp

SKU: sku-731

Application/Test Type: 3 Power Conductors

Common Mode Impedance: Frequency dependent 150 kHz – 26MHz: 150Ω ±20Ω 26MHz – 80MHz: 150Ω +60Ω -45Ω 80MHz –230MHz: 150Ω +60Ω -60Ω

Current Rating: 16 Amps

Frequency Range: 150 kHz to 230 MHz

Mains & EUT Connections: Multi-Contact Safety Socket

RF Connector: 50 Ω BNC (Female)

RF Input Voltage: 30 Volts

Standards Met: IEC / EN 61000-4-6

Voltage Division Factor: 10dB+1dB/-3dB

Voltage Rating: DC less than 600V, AC less than 250V

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Dressler S1 Coupling/Decoupling Networks (CDN) 150 kHz-230 MHz

SKU: sku-399

Weight: 1.9 Lbs (0.86 kg)

Application/Test Type: For coupling and decoupling of interference signals on screened lines

Current Rating: 1.5 Amps

Dimensions: 7.25 x 4.25 x 5.75 (inches)

Frequency Range: 150 kHz to 230 MHz

Mains & EUT Connections: BNC

Standards Met: IEC/EN 61000-4-6

Voltage Rating: 100 V

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Teseq CDN 118-T4 Coupling Decoupling Network set for 1.2/50 µs and 10/700 µs Surge Pulses on 1 or 2 twisted pairs

SKU: 30093

Application/Test Type: 1.2/50 μs (2 ohms) and 10/700 μs (15 ohms) pulse up to 6.6 kV line to ground, 3 kV line to line (Pulse frequency: 3 per minute)

Current Rating: 0.5 Amps

Decoupling chokes 1 kHz: 20 mH nominal

Dimensions: 335 x 232 x 180mm

Mains & EUT Connections: 4 mm safety banana; Fischer 103

Ohmic resistance per path: 3 Ω

Series resistor: in relation to the selected pulse coupling network

Transmission 3 dB BW: 250 kHz

Voltage Rating: 250 Volts AC/DC

Inquire for Lead Time

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3ctest 405T8A1 Surge CDN For Unshielded Data Lines

SKU: sku-332

Application/Test Type: Test high-speed communication lines against lightening surge as per picture 10 in IEC/EN61000-4-5 edition 3

Coupling: Common mode (line to ground)l 90V gas discharging tube

Current Rating: Max 1 A

Impedance: 200Ω ±5%

Input: 1.2/50us, 10/700us

Mains & EUT Connections: RJ45 female

Standards Met: IEC 61000-4-5 Ed. 3

Test Voltage: 6kV (10kV, customized)

Voltage Rating: 90 VDC

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