Checkpoint LAB USB-RS232 Manual do Utilizador descarregar pdf (Página 14)

NOISE IMMUNITY

optoisolator, optocoupler – on-line signal & drive

Analog and Digital Optocoupler /Optoisolators

Analog Devices:

• http://www.analog.com (Analog Devices)

• High speed couplers - Analog Devices

http://www.analog.com/en/interface-isolation/digital-

isolators/products/optocoupler_alternative_icoupler/fca.html

Low voltage 1.8 V isolators for bus or multiple I/O lines

• http://videos.analog.com/video/1553875079001/ADuM348x-First-

Isolator-to-Interface-to-18V-IO/

• http://www.analog.com/en/prod/0,2877,ADuM2401,00.html

• http://www.vishay.com/optocouplers/

Solid State Relays

• http://www.vishay.com/solid-state-relays/ ;

• http://www.vishay.com/docs/83820/lh1521ba.pdf

NOISE IMMUNITY

POLARITY PROTECTION

Input Port

–

(+)

(–)

Input Port

–

1N5822 or

1N5817

1N4001

Schottky

Schottky diode

Schottky Low

forward

voltage drop

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 23 24

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Checkpoint LAB USB-RS232 Manual do Utilizador Página 14