Issue 1.00 DLA200 Dual Line Amplifier Units Page 6
Internal configuration of the DBU
RS485 - 232 address/baud rate configuration switches
No Colour
Function
1
Brown
RS485 address select
2
Red
RS485 address select
3
Orange
RS485 address select
4
Yellow
RS485 address select
5
Green
Baud Rate select
6
Blue
Baud Rate select
7
Violet
Baud Rate select
8 Grey
Factory
Setting
Baud rate selection with switches 5- 8 (0=off)
5 6 7 Baud
rate
0 0 1 2400
0 1 0 9600
1 0 0 19200
Any Configuration of switches not shown here means the baud rate defaults to 9600.
RS485 unit address with switches 1 - 4 (0=off)
Note addresses have been started at 32 to avoid any possible conflict in reading data
4 3 2 1
Address
0 0 0 0
32
1 0 0 0
33
0 1 0 0
34
1 1 0 0
35
0 0 1 0
36
1 0 1 0
37
0 1 1 0
38
1 1 1 0
39
0 0 0 1
40
1 0 0 1
41
0 1 0 1
42
1 1 0 1
43
0 0 1 1
44
1 0 1 1
45
0 1 1 1
46
1 1 1 1
47
An internal connection change is required for changing from RS232 to RS485. For this ensure the unit
is switched off and the 12 cover screws are removed.
The jumper LK1 on the PCB needs to be set to the correct position in order to change between RS232
and RS485 operation. RS485 is towards the front of the unit, while RS232 is when the jumper is placed
towards the rear of the unit.
NOTE:
When the Ethernet option is fitted to the unit the user cannot change between RS232 or RS485,
however the baudrate and address can still be changed. If the baudrate is changed the internal settings
for the Moxa Ethernet board needs changing accordingly to match.
