Laurel-electronics LAUREATE SERIES Serial Comunications Manual de usuario descargar pdf (Pagina 5)

Another alternative for RS-485 is to use an RS-232 to RS-485 converter that plugs into the

computer RS-232 receptacle external to the computer and is powered from a +9V DC wall plug-

in adapter. One such unit is the B & B Electronics Model 485OT9L.

-4-

RS - 485 INTERFACE - J3A & J3B

FULL DUPLEX

ISO GROUND

BRX

ARX

ATX

BTX

ISO GROUND

MODEL 485OT9L

TB1

TDB (+) TRANSMIT +

TDA (-) TRANSMIT -

RDA (-) RECEIVE -

RDB (+) RECEIVE +

GND GROUND

RS232 TO 485 CONVERTER

SWITCH SETTINGS FOR MODEL 485OT9L

Baud rate

4800 Baud - S1-ON, S2-OFF S3-OFF S4-OFF

9600 Baud - S1-0FF, S2-ON S3-OFF S4-OFF

19200 Baud - S1-OFF, S2-OFF S3-ON S4-OFF

Echo - S5-OFF

2-wire/4-wire - S6-OFF, S7-OFF

Termination - S8-OFF

Driver Control - JP1-Jumper on SD

RS - 485 INTERFACE - J3A & J3B

HALF DUPLEX

ISO GROUND

ATX/ARX

BTX/BRX

ISO GROUND

MODEL 485OT9L

TB1

TDA (-) TRANS,RCV -

TDB (+) TRANS,RCV +

GND GROUND

RS232 TO 485 CONVERTER

SWITCH SETTINGS FOR MODEL 485OT9L

Baud rate

4800 Baud - S1-ON, S2-OFF S3-OFF S4-OFF

9600 Baud - S1-0FF, S2-ON S3-OFF S4-OFF

19200 Baud - S1-OFF, S2-OFF S3-ON S4-OFF

Echo - S5-ON

2-wire/4-wire - S6-ON, S7-ON

Termination - S8-OFF

Driver Control - JP1-Jumper on SD

1 2 3 4 5 6 7 8 9 10 ... 39 40

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