Rs232 Serial Communication; Rs485 Serial Communication - LAUMAS TLU Installation And User Manual

TLU
30
31
33
RS485 termination
J2 J1
If the RS485 network exceeds 100 metres in length or baud-rate over 9600 are used,
close the two jumpers, called "RS-485 termination", to activate two 120 ohm
terminating resistors between the '+' and '–' terminals of the line, on the terminal strip
of the furthest instruments. Should there be different instruments or converters, refer
to the specific manuals to determine whether it is necessary to connect the above-
mentioned resistors.

RS232 SERIAL COMMUNICATION

RS485 SERIAL COMMUNICATION

TLU
28 29 33
24 Vcc
+
VIN
0
CONVLAU
TX
RX
TLU
28 29
max 500 m
RS485 +
TX+
RS485 -
TX-
RX+
RX-
- 18 -
2
3
PC
5
DB9-F
TLU
33 28 29
RS485 +
RS485 -
33