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
.
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.
CDN Type | Application | Product Range |
M type |
|
CDN M1 CDN M2 CDN M2/3PE CDN M3 CDN M3PE CDN M4 CDN M4PE CDN M5PE |
AF type |
|
CDN AF2 CDN AF3 CDN AF4 CDN AF6 CDN AF8 |
S type |
|
CDN S1 CDN S2 CDN S4 CDN S8 CDN S9 CDN S15 CDN S19 CDN S24 CDN S25 |
T type |
|
CDN T2 CDN T4 CDN T8 |