Campbell Scientific SDM-CD16S 16-Channel Solid State DC Relay Controller Module - Manual (Page 9)

SDM-CD16S 16 Channel Solid State DC Control Module
For datalogger connections, see Table 1.
Multiple SDM-CD16Ss may be wired in parallel by connecting the datalogger
side of one SDM-CD16S to the next. In most installations the total length of
the cables connecting the SDM-CD16S and other SDM peripherals should not
exceed 20 feet.
Total cable lengths in excess of 20 feet may adversely influence
communication performance. (For CR7 dataloggers, the total cable length
should not exceed 600 feet.)
4.1 Wiring
4.1.1 SDM-CD16S Power and Control Connections
Refer to Figure 3 and Table 1 for SDM-CD16S operating power and control
connections to the datalogger.
EXTERNAL
7 TO 48 VDC
+ —
SDM-CD16S DATALOGGER
GND
C1
C2
C3
Connection to External Supply
SDM-CD16S DATALOGGER
12 V
C1
C2
C3
GND
Connection to Datalogger Supply
FIGURE 3. Connection Block Diagrams
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