2
.RS-485 BUS to 8 RS-485 ports(RS-485 BUS can be connected
128 sets RS-485 device in parallel at the same time)
3
. Host serial port (RS-232C) to RS-485 ports, or RS-485 BUS to
RS-485 ports (RS-485 BUS can be connected 128 sets RS-485
device in parallel at the same time)
1.
Host serial port (RS-232C) to 8 RS-485 ports
RS-232
Host
I / P R S - 2 3 2
( UT-1128 )
8
7
6
5
4
3
2
1
20
19
18
17
16
RS-485
BUS
I / P R S - 4 8 5
( UT-1128 )
RS-232
I / P R S - 2 3 2
( UT-1128 )
I / P R S - 4 8 5
( UT-1128 )
I / P R S - 4 8 5
or
RS-485 BUS
4
5
6
20
19
18
17
16
8
7
6
5
4
3
2
1
20
19
18
17
16
8
7
6
5
4
3
2
1
20
19
18
17
16
8
7
6
5
4
3
2
1
Standard DIN U35 DIN-Rail installation(bottom side)
RS-485 port malfunction alarm & protection is a good way
for connecting RS-485 devices and reliability improvement.
UT-1128 has 8 slave computer ports, all of them are with
short-circuit protection, and they can be worked under close
mode. When any of the RS-485 port short-circuit, it only will
affect its own RS-485 BUS system, but not other RS-485 ports
BUS system. User can find out the faults according to the
fault indicators.
RS-485
A
device
RS-485
B
device
RS-485
C
device
RS-485
D
device
RS-485
E
device
RS-485
F
device
RS-485
G
device
RS-485
H
device
RS-485
A
device
RS-485
B
device
RS-485
C
device
RS-485
D
device
RS-485
E
device
RS-485
F
device
RS-485
G
device
RS-485
device H
Host
RS-485
A
device
RS-485
B
device
RS-485
C
device
RS-485
D
device
RS-485
E
device
RS-485
F
device
RS-485
G
device
RS-485
A
device
RS-485
B
device
RS-485
C
device
RS-485
D
device
RS-485
E
device
RS-485
F
device
RS-485
G
device
RS-485
device H
