53
Master
PLC & other device
Termination resistor
A
B
Slave
AC85~AC240V
48Hz~63Hz
BS-3520
6
7
Master
PLC & other device
Termination resistor
A
B
Slave
AC85~AC240V
48Hz~63Hz
BS-3520
6
7
AC85~AC240V
48Hz~63Hz
BS-3520
6
7
AC85~AC240V
48Hz~63Hz
BS-3520
6
AC85~AC240V
48Hz~63Hz
BS-3520
6
7
7
12-1-3 Example of
RS-485 connection
1.
1:1 connection with master
Shield
cable
and
twist
pair
cable
shall
be
used
.
Longitudinal resistance shall be exerted to both ends of writing. (100Ω ~ 120Ω, 1/2W~2W)
There may be a reverse display of A and B for some master equipment.
Connect by changing A and B in case communication is unavailable.
2.
Multiple connection of BS-3520 to 1 master