Laurel-electronics LAUREATE SERIES Serial Comunications Manual de usuario descargar pdf (Pagina 6)

1.3 RS-232 AND RS-485 JUMPERS SETTINGS

RS232 Interface

Jumper g - installed for normal operation

Jumper h - installed when used as a slave display with

the RS232 output of another meter of the series.

Jumper j - provides a pull-up resistor on the RTS line.

Note: The board is shipped standard with jumpers g

and j installed RS232

RS485

RS485 Interface

Note: Bias jumpers b and e must be

installed on board for proper operation. If

the outputs of more than 1 RS485 are

connected together, then one (AND ONLY

ONE) RS485 board must have the jumpers

installed.

Full Duplex

Jumpers b and e - bias jumpers installed on

one board

Jumpers a and d - are installed with long cable

runs to add 121 ohm termination resistors. If mul-

tiple meters are on same line, only the last meter

in the line should be jumpered.

Half Duplex

Jumpers b and e - bias jumpers installed on one board

Jumpers c and f - installed for half duplex operation

Jumper a - is installed with long cable runs to add 121 ohm

termination resistor. If multiple meters are on same line, only the

last meter in the line should be jumpered.

-5-

1 2 3 4 5 6 7 8 9 10 11 ... 39 40

Sin comentarios

Laurel-electronics LAUREATE SERIES Serial Comunications Manual de usuario Pagina 6