Campbell Scientific SDM-SIO4 4-Channel Serial I/O Interface - Manual (Page 11)

Section 1. Introduction
1-5
1.2.5 Environmental Operating Range
-25°C to +50°C (contact Campbell Scientific for extended temperature
requirements)
0 - 95% RH (non-condensing)
1.2.6 Other Key Features
• An internal lithium battery which retains configuration information
(estimated life 10 years)
• A built-in system watchdog which will reset the processor in the event of a
crash caused by transients, etc.
• A multi-tasking operating system allowing concurrent transmission and
receipt of data on all ports. This allows the receipt and processing of data
from all four serial ports concurrently at 9600 baud.
• A built-in status LED to give an indication of system function on power-up.
1.3 ‘Talk-Through’ Mode
Recent versions of the CR10X and CR23X datalogger operating systems allow
a user, while connected to the datalogger, to switch to a ‘talk-through’ mode via
either a direct or a remote telecommunication connection. This allows users to
communicate with a device connected to one of the four serial ports of the
SDM-SIO4 as if they were directly connected to that device. This can be very
useful for diagnosis or configuration of the remote device(s).
Users can also ‘talk through’ to access the command line mode of the
SDM-SIO4, enabling them to check the status of, or even to reconfigure, an
SDM-SIO4 via a remote connection.
Full details on using the command are given in the appropriate datalogger
manual – see the section on ‘Telecommunication’.
See Appendix C of this manual for limitations on the use of the talk-through
mode.