Reliant EMC

Schwarzbeck LISN / AMN solutions

Schwarzbeck family of LISN Line Impedance Stabilisation Networks / AMN Artificial Mains Network

 

Click here for the Schwarzbeck LISN Overview Matrix
 
A LISN Line Impedance Stabilization Networks / AMN Artificial Mains Network
Supplies the neccessary 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
 Schwarzbeck LISN Figure 1: Measurement setup conducted disturbances
Figure 1: Measurement setup conducted disturbances
 
We can distinguish three types of LISN:
V-LISN
T-LISN
Delta-LISN
 
Figure 2 shows the voltage relationship of a two-line-system with separate ground.
 
The V-LISN measures the unsymmetric 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.

 

 Schwarzbeck LISN-Topology Figure 2: LISN / AN Topology

 

 Schwarzbeck LISN Overview Matrix
Type
Topology
Impedance
Current
max.
Paths
Options
CISPR 16-1-2 socket (V-LISN CISPR 16-1-2)
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 (V-LISN CISPR 16-1-2)
Type
Topology
Impedance
Current
max.
Paths
Options
NNLK 8121
V-LISN
(50 µH + 5 Ω) || 50 Ω
4 x 50 (100) A
 4
RC, Hochstrom, 400/700V, Lüfter
NSLK 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 LISN
Type
Topology
Impedance
Current
max.
Paths
Options
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 LISNS for MIL-461 and MIL-462L
Type
Topology
Impedance
Current
max.
Paths
Options
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 (ISN / T-Networks)
Type
Topology
Impedance
Current
max.
Paths
Options
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
Type
Topology
Impedance
Current
max.
Paths
Options
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
 
(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


 

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