Campbell Scientific SDM-CD8S 8 Channel Solid State DC Control Module - Manual (Page 7)

SDM-CD8S 8 Channel Solid State DC
Control Module
FIGURE 1. SDM-CD8S face panel
1. Function
The SDM-CD8S has 8 DC voltage outputs and returns that can be switched on
and off manually or under datalogger control. The “switch” is in the power
return. The power Input (6-26 VDC) powers both the outputs and the SDM-
CD8 logic. LEDs allow a visual indicator of active outputs.
The outputs can be controlled by a datalogger or controlled manually with an
override switch and individual rocker switches for each of the outputs.
When the manual control switch is in the ON position, outputs are controlled
by the position of the individual rocker switches. In the OFF position the state
of the relays is controlled by the SDM commands from the datalogger.
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