RS-485 Port Protection Evaluation Board 2

Performance Graphs

11/11 • FU1107

ESD +8 KV Contact Discharge (IEC-61000-4-2)

Surge 1.2/50 5 KV

Figure 3

Figure 4

Figure 5

Figure 6

Ch 1: input voltage / surge / fault to TBU® HSP

Ch 4: TBU® HSP current

1

Ch1

Ch1

116 V

MA

400 ns

31.60 %

1.00 A Ω

Ch4

200 V

Ch1 Max

329 V

Ch1 Min

-20.5 V

Trig?

PreVu

Ch4 Max

1.98 A

Ch4 Min

-81.1 mA

T

T

4

The ohm unit following the current units

shown for Channel 4 (i.e. AOhm)

indicates that a 50 ohm termination was

used internal to the oscilloscope

T

Ch 1: input voltage / surge / fault to TBU® HSP

Ch 4: TBU® HSP current

1

Ch1

Line

116 V

MA

4.00 ms

20.20 %

200 mA Ω

Ch4

100 V

Ch1 Max

124.4 V

Run

Trig’d

Ch4 Max

365.4 mA

Ch4 Min

-322.4 mA

T

T

4

The ohm unit following the current units

shown for Channel 4 (i.e. AOhm)

indicates that a 50 ohm termination was

used internal to the oscilloscope

T

Ch 1: input voltage / surge / fault to TBU® HSP

Ch 4: TBU® HSP current

Ch1

Line

116 V

MA

4.00 ms

20.20 %

200 mA Ω

Ch4

20.0 V

Ch1 Max

28.3 V

Run

Trig’d

Ch4 Max

451.8 mA

Ch4 Min

-395.7 mA

T

T

The ohm unit following the current units

shown for Channel 4 (i.e. AOhm)

indicates that a 50 ohm termination was

used internal to the oscilloscope

T

Reference

For more information on implementing advanced circuit protection technologies for RS-485 ports, please review the Bourns RS-485

“TBU”is a registered trademark of Bourns, Inc. in the U.S., Taiwan and European Community.

“Bourns”is a registered trademark of Bourns, Inc. in the U.S. and other countries.

COPYRIGHT© 2011 • BOURNS, INC. • 11/11 • e/FU1107

For further technical support and for complete

circuit protection solutions, please visit

www.bourns.com

Ch 1: input voltage / surge / fault to TBU® HSP

Ch 4: TBU® HSP current

1

Ch1

Ch1

-380 V

MA

10.0 ns

20.40 %

5.00 A Ω

Ch4

500 V

Ch1 Max

545 V

Ch1 Min

-390 V

Trig?

Run

Ch4 Max

11.3 mA

Ch4 Min

-2.55 A

T

T

4

The ohm unit following the current units

shown for Channel 4 (i.e. AOhm)

indicates that a 50 ohm termination was

used internal to the oscilloscope

T