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3.
Initial Inspection
4.
Overview
SDM-SIO1A and SDM-SIO4A Serial Input/Output Modules
•
The SDM-SIO1A ships with the following:
o
Two screws and plastic inserts to allow the module to be installed on
the backplate of standard Campbell Scientific enclosures
o
ResourceDVD (1), which includes the following:
This manual
−
−
DevConfig 2.12 software or later (only needed if upgrading the
operating system of the SDM-SIO1A)
•
Upon receipt of the SDM-SIO1A, inspect the packaging and contents for
damage. File damage claims with the shipping company. Contact
Campbell Scientific to facilitate repair or replacement.
The SDM-SIO1A expands the number of serial ports on a Campbell Scientific
datalogger. It can be used as a means of collecting data from digital sensors
and/or to send commands to sensors and devices. It can also be used to send
data to remote display devices.
The SDM-SIO1A will accept serial data and store it in its buffer allowing
remote equipment to transmit large amounts of data without needing to stop
other processes in the datalogger whilst the data is received.
The SDM-SIO1A connects to the datalogger via three digital lines using a
proprietary protocol called SDM. It connects to the remote serial device using a
standard serial interface that can be set to RS-232, RS-485, or RS-422 signal
levels.
Up to 15 SDM-SIO1As can be connected to a single datalogger via the SDM
port, allowing the user to connect 15 different items of equipment to their
datalogger with ease, in addition to any connections made to the datalogger
built-in serial ports. Up to four SDM-SIO4As can be connected to the
datalogger as each module uses four successive SDM addresses, one per serial
port.
The SDM-SIO1A can also be used in "talk-through" mode to allow a user to
talk, via a terminal program, to a sensor connected to the SDM-SIO1A for test
and diagnostic purposes. Please refer to the datalogger manual for further
details.
3
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