Measurement-computing PCI-COM422/485 Instrukcja Użytkownika Pobierz pdf (Strona 20)

RTS/CTS Transceiver type SP490

Data Rate 5Mbps min.

RTS/CTS Transceiver Input Characteristics

Input Voltage ±14V max.

Data Rate 5Mbps min.

Differential Threshold Voltage ±0.2V

Input Current 1mA (Vin = 12V)

-0.8mA (Vin=-7V)

Propagation Delay 90ns typ. (tplh/tphl)

RTS/CTS Transceiver Output Characteristics

Differential Output Voltage GND to Vcc (unloaded)

Short Circuit Current ±250mA

Propagation Delay 30ns typ. (tplh/tphl)

Miscellaneous All inputs supplied with 120 ohm jumper selectable

termination, data pull-up and data pull-down

resistors

RANSIENT

OLTAGE

UPPRESION

PTION

Board Description

PCI-COM422/485/S

PCI-COM

422/485-2/S

Data Transceiver Input SP491

Input Voltage Range (derated) ±12V

RTS/CTS Transceiver Input SP490

Input Voltage Range (derated) ±12V

TVS type SMAJ12A

Working Voltage ±12V

Breakdown Voltage 13.3V min.

14.7V max.

Peak Pulse Surge Current 15.1A max. (avalanche duration time =10µs)

Peak Pulse Power Dissipation 300W max. (avalanche duration time =10µs)

Peak Pulse Power Dissipation is proportional to the

amount of time the TVS remains in the avalanche

mode. For specific power vs. avalanche duration

information, consult the SMAJ12A datasheet.

NVIRONMENTAL

Operating temperature range 0 to 70°C

Storage temperature range -40 to 100°C

Humidity 0 to 90% non-condensing

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