Type 2530H1
9
Always set the three switches adjacent to the RS485
OUT connector to the up position, when using the con-
verter with a Type 2530H1 HART interchange multi-
plexer.
Setting the Converter RS485 Baud Rate
The set of ten switches between the RS232 connector
and the RS485 OUT connector determine the convert-
er baud rate. To set the converter for a baud rate of
38.4K baud (the recommended baud rate) set the
switch labeled 38.4K to the up position. Set all other
switches in the set of ten to the down position. To se-
lect another baud rate, set the switch labeled with the
desired baud rate to the up position and set all other
switches in the set of ten to the down position.
Multiplexer DIP Switches
The HART interchange multiplexer has eight dip
switch settings. The eight switches are numbered and
labeled on the face of the unit as follows:
Switches 1 through 5 set the network address.
Switches 6 and 7 set the baud rate.
Switch 8 puts the multiplexer into the test mode.
This switch should be OFF.
Note
Do not use a pencil to set the switches.
Graphite from the pencil can fall into the
switches causing them to fail.
To set the switches, use a pointed object to push the
switch to the desired position. See figure 13 for more
detail on multiplexer switch positions.
Setting the Multiplexer RS485 Addresses
Note
After changing the switch positions,
power to the multiplexer must be re-
moved and reapplied before the change
will become effective.
Use switches one through five to set network address-
es. There are a total of 32 possible addresses (0
through 31) for assignment to the multiplexer.
Each multiplexer in an RS485 network must have a
different address. When setting an address:
1. Remove power from the multiplexer.
2. Set the addresses. Table 3 shows the switch set-
tings for each of the 32 possible addresses.
Table 3. RS485 Address Switch Settings
Address
Switch Setting
Address
1
2
3
4
5
0
1
2
3
4
Off
ON
Off
ON
Off
Off
Off
ON
ON
Off
Off
Off
Off
Off
ON
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
5
6
7
8
9
ON
Off
ON
Off
ON
Off
ON
ON
Off
Off
ON
ON
ON
Off
Off
Off
Off
Off
ON
ON
Off
Off
Off
Off
Off
10
11
12
13
14
Off
ON
Off
ON
Off
ON
ON
Off
Off
ON
Off
Off
ON
ON
ON
ON
ON
ON
ON
ON
Off
Off
Off
Off
Off
15
16
17
18
19
ON
Off
ON
Off
ON
ON
Off
Off
ON
ON
ON
Off
Off
Off
Off
ON
Off
Off
Off
Off
Off
ON
ON
ON
ON
20
21
22
23
24
Off
ON
Off
ON
Off
Off
Off
ON
ON
Off
ON
ON
ON
ON
Off
Off
Off
Off
Off
ON
ON
ON
ON
ON
ON
25
26
27
28
29
ON
Off
ON
Off
ON
Off
ON
ON
Off
Off
Off
Off
Off
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
30
31
Off
ON
ON
ON
ON
ON
ON
ON
ON
ON
Table 4. Baud Rate Switch Settings
Baud Rate (baud)
Switch Setting
Baud Rate (baud)
6
7
9600
19200
38400
Off
ON
Off
Off
Off
ON
3. Apply power to the multiplexer.
Setting the Multiplexer RS485 Baud Rate
Note
After changing the switch positions,
power to the multiplexer must be re-
moved and reapplied before the change
will become effective.
Use switches six and seven to set the multiplexer
baud rate. A baud rate of 38.4K baud is recommended
for optimum data refresh rates. The switch settings
required to obtain the various baud rates are shown in
table 4.
Note
At system startup, check to see that all
network components, including the
