Campbell Scientific SDM-IO16 16-Channel Input/Output Expansion Module - Manual (Page 8)

SDM-IO16 16 Channel Input/Output Expansion Module
to sixteen SDM-IO16s may be addressed, making it possible to control a
maximum of 256 ports from the first three datalogger control ports.
The SDM-IO16 is supplied with two removable mounting brackets that attach
to the ends of the unit, as shown in Figure 1.
The full functions and support for the error checked
communications protocol require an operating system for the
datalogger and Edlog template files that post-dates March 2002.
The CR10X and CR23X with older operating systems and the
CR10, CR7 and 21X dataloggers can use I/O Instruction 104 to
set and use the ports for output only. NOTE
2. Specifications
2.1 General
Compatible dataloggers: CR800, CR850, CR1000, CR3000, CR5000,
CR10X, and CR23X. (CR10, 21X, and CR7
output modes only.)
Operating voltage: 12 VDC nominal (9 to 18 V).
Current drain at 12V DC: 600 µA typical standby (All ports HI, no load,
not pulse counting).
Maximum (no output load): 3 mA active with
all 16 ports counting pulses at 2 KHz. Above
the quiescent level, power consumption is
roughly proportional to input signal frequency
and number of ports used.
Current drawn from any output must be added
to the quiescent level to give the total current
drain.
SDM and I/O port: 0/5 V logic level ports compliant with the
requirements of the CS SDM protocol — these
are designed for connection to the datalogger's
control/SDM ports.
Operating temperature: -25 °C to +50°C standard
Size: 235 mm over mounting brackets x 100 mm x
24 mm
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