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Schaffner NSG 500B/11 Interference Simulator for Automotive Electronic Equipments
Electronic equipment connected to
automobile electrical systems can also be susceptible to the interference
which is generated by switching of various inductive loads. This causes
surge voltages to appear on the supply lines of the vehicle of various
amplitudes, energy and rise times . Specifically, when the inductive loads
are disconnected from the battery with a mechanical switch, high energy in
the form of interference pulses or groups of pulses are created. The NSG
500B/11 allows the simulation of this interference in the laboratory to
enable the design engineer to determine if their products will fall prey
to these power line faults. If they do, he can design out the problems
before their company tries to market the design. To avoid interference
pulses generated by the NSG 500B/11 affecting the battery, a power line
filter has been incorporated.
All of the pulse outputs are protected
against short circuits. The input and output sockets are floating, so that
they can be connected to any desired potential. The following pulse types
can be generated by the NSG 500B/11:
| Pulse Type 1 |
+ 30V / 300V
Pulse Width: 2ms + 0.2ms
Rise Time: 1μs + 0.3μs
Period: 5s
Impedance: 10Ω or 30Ω
(by changing the resistance in the front panel) |
| Pulse Type 2 |
+ 30V / 300V
Pulse Width: 50μs +15μs
Rise Time: 0.3μs + 0.1μs
Period: 5s
Impedance: 10Ω or 30Ω
(by changing the resistance in the front panel) |
Pulse Type 3
(ISO 3a Pulse) |
-40V / -200V, continuously variable
Pulse Width: 100ns + 100ms - 0ns
Rise Time: 5ns + 3ns - 0ns
Period: 100μs, 10μs
Single pulses per pulse sequence: 100, + 15
Impedance: 50Ω |
Pulse Type 4
(ISO 3b Pulse) |
+ 40V / +200V continuously variable
Pulse Width: 100ns + 100ms - 0ns
Rise Time: 5ns + 3ns - 0ns
Period: 100μs, 10μs
Single pulses per pulse sequence: 100, + 15
Impedance: 50Ω |
Pulse Type 5
(ISO Pulse 6) |
+ 30V / 300V
Pulse Width: 300μs + 30μs
Rise Time: 60μs + 15μs
Period: 15s
Impedance: 10Ω or 30Ω
(by changing the resistance in the front panel) |
Pulse Type 6
(load dump)
with NSG 506
(ISO Pulse 5) |
0 / +200V + 10%, continuously variable
Pulse Width: 150 / 500ms + 10% by some 50ms steps
Rise Time: 70μ / 30%
Period: 5s
Impedance: 2Ω + 10% |
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