Ohaus RS422 Interface Option Kit Manual multi User Manual
Page 15
Paquete opcional RS485 / RS422 ES-3
• La opción RS485 / RS422 puede configurarse para modo de operación dúplex (4
hilos) o medio dúplex (2 hilos). El puente W1 debe retirarse para el modo
dúplex e instalarse para el modo medio dúplex.
Figura 2.3 Dúplex Figura 2.4 Medio dúplex
• Se proporciona una conexión a tierra en el conector J2 para los sistemas que la
requieren.
•
Se proporciona una resistencia de terminación de 120 ohmios al instalar un
puente en el conector W2 de la tarjeta de PC RS485 / RS422. Cuando se
cortocircuita el W2, la resistencia de terminación se coloca entre las líneas RXD +
y RXD -.
•
Para más información acerca de instalaciones de RS485, consulte el documento
TSB-89-A
Application Guidelines for TIA/EIA-485-A
, publicado por la
Telecommunications Industry Association.
.
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