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SDM-IO16 16-Channel Input/Output Expansion Module
e SDM-IO16 expands the digital input and/or
output capability of Campbell Scienti c dataloggers. It
o ers similar functionality to the control ports of our
dataloggers. When con gured as an input, each port
can monitor logic state, count pulses and switch clo-
sures, measure signal frequency, and determine duty
cycle. When con gured as an output, the SDM-IO16
can drive normal logic level inputs and directly control
low-voltage valves and relays.
SDM-SIO1 Serial Input/Output Module
e SDM-SIO1 expands the number of serial devices
that can communicate with a CR800, CR850, CR1000,
or CR3000 datalogger. e SDM-SIO1 module con-
nects to a remote serial device using industry standard
hardware that can be set to true RS-232, RS-485 or
RS-422 mode. It accepts up to 2047 bytes of serial
data and stores the data in a bu er. e bu er allows
remote equipment to transmit large amounts of data
without hindering other processes in the datalogger.
SDM-SIO4 Four-Channel Serial Input/Output Interface
e SDM-SIO4 adds capacity and exibility to a data-
logger. It has four serial ports that communicate with
intelligent serial sensors, display boards, printers, satel-
lite links, and other serial devices. Once programmed,
the SDM-SIO4 communicates with connected devices
in parallel with the datalogger’s own program se-
quence, thus making the complete datalogging system
faster and more e cient.
SET UP
STATUS
SDM-SIO4
4-Channel Serial I/O
M
odule
MADE IN ENCLAND
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