SDM-CVO4 4-Channel Current/Voltage Output Module
6
•
Provides four independent current or voltage outputs
•
Drives remote current-loop display units
•
Retransmits measured values to industrial control systems that have
current or high-voltage inputs
•
Sends control signals to valve controllers
•
Provides excitation voltages or currents to external sensors
•
Compatible CRBasic data loggers: CR6, CR3000, CR1000X, CR800
series, CR1000
5.1 Power Considerations
The SDM-CVO4 power requirements are large compared to most Campbell
Scientific products, especially when driving significant loads. Care must be
taken to ensure that the power supply can cope with this higher demand.
Alkaline batteries are
not
recommended for long term applications.
The SDM-CVO4 has two internal power supplies, one for channels 1 and 2 and
one for channels 3 and 4. It only turns on the power supply for channels 3 and
4 if sent an instruction that sets the output of those channels. If channels 3 and
4 are not used, the power consumption is approximately 20 mA lower than
when all outputs are used.
Where supported by the data logger, and when the application allows it, the
SDM-CVO4 can be shut down to reduce its consumption to less than 0.5 mA.
In this state, all outputs are switched off.
