Schwarzbeck Mess Elektronik

Schwarzbeck - EMC measurement equipment

Schwarzbeck Mess Elektronik was founded by Günter Schwarz Beck in 1953. Schwarzbeck Mess Elektronik is headquartered in Schoenau – Altneudorf, near Heidelberg, Germany. The main focus of Schwarzbeck Mess Elektronik is the development, manufacture and distribution of products and services related to EMC measurements.

LISN Line Impedance Stabilisation Networks / AMN Artificial Mains Network

A LISN Line Impedance Stabilization Networks / AMN Artificial Mains Network

  • supplies the necessary mains voltage (AC or DC) and current for the Equipment under Test (EuT).
  • couples interference voltage generated by the EuT and supplies it to the receiver.
  • provides well defined RF-impedance to the Equipment under Test (EuT)
  • keeps away unwanted disturbance coming from mains (filter)
  • protects the mains from unwanted disturbance voltage generated by the EuT

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We can distinguish three types of LISN: V-, T- and Delta-LISN

The V-LISN measures the unsymmetrical disturbance voltage between the two lines L1 and ground or L2 and ground respectively. V-LISN are also called V-ANM (Artificial Mains Network). The V-LISN is by far the most commonly used LISN.

There are two types of V-LISN with different impedances. The V-LISN with a 5μH inductance (CISPR 16-1-2, CISPR 25, ISO 7637, DO160) are normally used to measure equipment for vehicles, boats and aircrafts connected to onboards mains with DC or 400 Hz. The other Type of V-LISN with 50 µH according to CISPR 16-1-2, MIL STD 461 and ANSI C63.4 is intended to operate at mains frequencies of 50 Hz or 60 Hz.

The T-ISN (Figure 2 right) measures the asymmetric disturbance voltage (common mode voltage) and provides it to an EMI Receiver. T-ISN is normally used for measuring telecommunication and data transmission equipment connected to symmetrical lines as e.g. twisted pairs..

 

LISN / AN Topology

Schwarzbeck LISN overview


Type Topology Impedance Current max. Paths Options
CISPR 16-1-2 socket
NSLK 8117 V-LISN (50 µH + 5 Ω) || 50 Ω 2 x 10 A 2
NSLK 8127 V-LISN (50 µH + 5 Ω) || 50 Ω 2 x 16 A 2 RC, PLC
NSLK 8126 V-LISN (50 µH + 5 Ω) || 50 Ω 2 x 16 A Schuko
4 x 16 A CEKON
4 RC
NSLK 8128 V-LISN (50 µH + 5 Ω) || 50 Ω 2 x 16 A Schuko and
4 x 32 A CEKON
4 RC
NSLK 8163 V-LISN (50 µH + 5 Ω) || 50 Ω 4 x 64 A CEKON 4 RC
CISPR 16-1-2 Wing Terminals
NNLK 8121 V-LISN (50 µH + 5 Ω) || 50 Ω 4 x 50 (100) A  4 RC, Hochstrom, 400/700V, Lüfter
NNLK 8122 V-LISN (50 µH + 5 Ω) || 50 Ω 2 x 50 A  2
NNLK 8129 V-LISN 50 µH || 50 Ω 4 x 200 (300) A  4 RC, 400/700 V, Lüfter
NNLK 8129-2 HV V-LISN 50 µH || 50 Ω 2 x 200 (300) A 2 RC,TC
NNLK 8130 V-LISN 50 µH || 50 Ω 4 x 400 (500) A  4 RC
NNLK 8140 V-LISN 50 µH || 50 Ω 1 x 800 (1000) A single
Automotive
NNHV 8123 V-LISN 5µH || 50 Ω 70 (100) A single
NNHV 8123-200 V-LISN 5µH || 50 Ω 200 A single
NNHV 8123-400 V-LISN 5µH || 50 Ω 400 A single
NNBM 8124 V-LISN (5µH + 1 Ω) || 50 Ω 70 (100) A single N-connector
NNBM 8124-200 V-LISN (5µH + 1 Ω) || 50 Ω 200 A single N-connector
NNBM 8124-400 V-LISN (5µH + 1 Ω) || 50 Ω 400 A single N-connector
NNBM 8126 A 890 V-LISN 5 µH || 50 Ω 70 (100) A single DO-160
BAN 8508 8 A (DC) single
BAN 8530 30 A (DC) single
MIL
NNBL 8225 V-LISN (50 µH + 5 Ω) || 50 Ω 20 A single
NNBL 8226 V-LISN (50 µH + 5 Ω) || 50 Ω 70 (100) A single
NNBL 8226-HV V-LISN (50 µH + 5 Ω) || 50 Ω 70 (100) A single
NNBL 8226-2 V-LISN (50 µH + 5 Ω) || 50 Ω 70 (100) A 2
NNBL 8229-HV V-LISN (50 µH + 5 Ω) || 50 Ω 200 A single
NNBL 8230 V-LISN (50 µH + 5 Ω) || 50 Ω 300 A single
NNBL 8240 V-LISN (50 µH + 5 Ω) || 50 Ω 800 (1000) A single
T-ISN
NTFM 8131 T-ISN 150 Ω ± 10% 3 A (AC)  2
NTFM 8158 T-ISN 150 Ω ± 20 Ω 600 mA DC (pair)  2
CAT5 8158 T-ISN 150 Ω ± 20 Ω 600 mA DC (pair)  2
CAT3 8158 T-ISN 150 Ω ± 20 Ω 600 mA DC (pair)  2
ISN S8 T-ISN 150 Ω ±20 Ω
150 Ω + 60 Ω /-45 Ω
1 A (DC)  8
ISN S1 T-ISN 150 Ω ±20 Ω
150 Ω + 60 Ω /-45 Ω
1 A (DC) single
Special – LISN
Pilot ISN 150 Ω ±20 Ω 1.4 A DC 2
ECSS LISN1 (1.5 µH) || 50 Ω 10 A 2
ECSS LISN 2 (2 µH) || 50 Ω 10 A 2
ECSS LISN 2 – 75A (2 µH) || 50 Ω 75 A 2
ECSS LISN 3 (0.7 µH) || 50 Ω 10 A 2
NPLC 8500 V-LISN 1 Ω 16 A single
PVDC 8300 PV-LISN
Universal
150 Ω common
100 Ω differental
50 A (100 A with opt. fans)  2 Fans
PVDC 8301 PV-LISN
Universal
150 Ω common
100 Ω differental
200 A  2
TEMP 8400

Tempest-

V-LISN

1.4 kΩ 16 A  2 TEMP 8401

CDN – Coupling / Decoupling Networks

The Coupling- / Decoupling Networks are used to inject common mode disturbances to Equipment under Test (EuT). Further the CDNs provide sufficient decoupling between Auxiliary Equipment (AE) and disturbance signal. The requirements for CDN and their application are described in the standard IEC 61000-4-6 (Immunity to conducted disturbances, induced by radio-frequency fields). CDNs have a common mode impedance of 150 Ohm and are available for a multitude of cable types and connectors.

Schwarzbeck CDN – Overview

 

CDN Type Application Product Range
M type
  • Mains
  • Unscreened lines
  • Unbalanced lines
  • AC or DC
  • Power supply applications
  • High current
CDN M1
CDN M2
CDN M2/3PE
CDN M3
CDN M3PE
CDN M4
CDN M4PE
CDN M5PE
AF type
  • Unscreened lines
  • Unbalanced lines
  • Low current
CDN AF2
CDN AF3
CDN AF4
CDN AF6
CDN AF8
S type
  • Coaxial cables
  • Shielded lines
  • Screened lines
CDN S1
CDN S2
CDN S4
CDN S8
CDN S9
CDN S15
CDN S19
CDN S24
CDN S25
T type
  • Unscreened lines
  • Balanced lines
  • Telecommunication ports
  • Unshielded twisted pairs
CDN T2
CDN T4
CDN T8