Campbell Scientific SDM-INT8 8-Channel Interval Timer - Manual (Page 33)

Appendix A. Address Jumper
The address is factory set at address 00. Figure A1 (also shown inside the
INT8 cover) shows the 16 possible positions and their corresponding address.
Use the addresses shown in Figure A1 in Instruction 101.
The address block requires soldering to change the address. If two or more
INT8s are to be used on the same datalogger, one can remain at address 00,
while the others must be changed. Disconnect power before opening the case
and soldering.
Every SDM device connected to the datalogger must have a unique address.
Figure A-1. Address Selection
A-1