Section 2. installation and hardware set-up, 1 setting the sdm address – Campbell Scientific SDM-SIO4 4-Channel Serial I/O Interface User Manual
Page 13
2-1
Section 2. Installation and Hardware
Set-Up
The
SDM
-
SIO4
is
designed
to
be
mounted
on
an
enclosure
chassis
plate
using
the
two
mounting
holes
in
the
tabs
on
the
side
of
the
case
.
Before installation, it is necessary to set up the address of the SDM-SIO4 and also the
mode of operation of each serial port. These settings are determined by jumpers inside the
case. To access these, remove the four M3 screws and lift the lid off. With the connectors
facing you, you will see two blocks of jumpers on the right hand side of the circuit board.
Turn off the 12V supply and take static prevention
precautions before removing the lid.
2.1 Setting the SDM Address
The 4 x 2-way block of jumpers close to the ‘D’ connectors selects the SDM
address of the SDM-SIO4. This address ranges from 0 to 15. The four selector
blocks are numbered on the PCB silk screen as 1, 2, 4, and 8; ‘8’ is closest to
the ‘D’ connectors. This is in binary format as shown in Table 2-1.
TABLE 2-1. Address Settings
Selector Block Settings
SDM Address
8
4
2
1
0
0
0
0
0
0
0
0
1
1
0
0
1
0
2
0
0
1
1
3
0
1
0
0
4
0
1
0
1
5
0
1
1
0
6
0
1
1
1
7
1
0
0
0
8
1
0
0
1
9
1
0
1
0
10
1
0
1
1
11
1
1
0
0
12
1
1
0
1
13
1
1
1
0
14
1
1
1
1
15
NOTE: A ‘1’ means the selector block shorts both pins. ‘0’ means the selector
is only connected to one pin (for storage).
CAUTION